РЕСПИРАТОРНЫЕ МОНИТОРЫ И СПОСОБЫ МОНИТОРИНГА ДЫХАНИЯ

... 1. Респираторный монитор, содержащий: ! первый датчик (20, 70), выполненный с возможностью генерирования сигнала (72) мониторинга респираторно-связанных движений, указывающего на респираторно-связанные движения; ! второй датчик (20, 22, 80, 82), выполненный с возможностью генерирования сигнала (84) мониторинга шумов, указывающего на респираторно-связанные шумы; а также ! синтезатор (90) сигналов, выполненный с возможностью синтеза сигнала (46) респираторного монитора на основе сигнала мониторинга респираторно-связанных движений и сигнала мониторинга респираторно-связанных шумов. ! 2. Респираторный монитор по п.1, в котором первый датчик (20, 70) и второй датчик (20, 22, 80, 82) содержат: ! датчик (20), выполненный с возможностью генерирования сигнала (66) датчика, указывающего как на респираторно-связанные движения, так и на респираторно-связанные шумы; ! первый фильтр (70), выполненный с возможностью выделения из сигнала датчика низкочастотного сигнала, содержащего частоты, относящиеся ...

DRAHTLOSES PERSÖNLICHES LOKALES NETZWERK

Traffic load generation method for mobile radio system testing

The method involves using several mobile stations (M) which access a common bus (CAN) and communicate with a control computer (SR) in a parallel mode via the bus. The control computer monitors and controls the load generation. Preferably, the generated load for testing the base station (BSS) is increased or reduced stepwise by including mobile stations connected to the bus. The mobile stations are activated or deactivated via the control computer.

Verfahren und Vorrichtung zum Testen mit einem Übertragungskanal mit Rauschen

Bei einem Verfahren zur Erzeugung eines Übertragungskanals mit Rauschen zum Testen eines LTE-Mobilfunkgeräts werden zwischen dem Tester und dem LTE-Mobilfunkgerät in einem Übertragungskanal, der eine Vielzahl von Trägerfrequenzen umfasst, mehrere physikalische Kanäle sowie Referenzsignale zur Evaluierung der Kanalqualität übertragen (41). Dabei werden durch Modulation aus der Vielzahl von physikalischen Kanälen und Referenzsignalen Modulationssymbole erzeugt (42), die nachfolgend entsprechend einem Frequenz-Zeit-Übertragungsschema bestimmten Zeitintervallen und Trägerfrequenzen zugewiesen werden (46). Daraufhin werden die Trägerfrequenzen durch eine Fourier-Transformation zusammengefasst (47) und auf dem Übertragungskanal ausgegeben (48), wobei der Übertragungskanal mit einem Rauschen verzerrt wird (45). Erfindungsgemäß werden nun das eine oder die mehreren vorbestimmten Referenzsignale und/oder ein oder mehrere vorbestimmte physikalische Kanäle gezielt nicht durch Rauschen verzerrt (43 ...

RFID-SYSTEM UND INFORMATIONSVERARBEITUNGSVERFAHREN

Ein RFID-System (1, 1A) speichert erste chronologische Daten (DA_1), die einen Empfangspegel eines Signals an einer ersten Kommunikationsvorrichtung (100A) repräsentieren, und zweite chronologische Daten (DB_1), die einen Empfangspegel eines Signals an einer zweiten Kommunikationsvorrichtung (100B) in einer Messperiode repräsentieren. Das System (1, 1A) spezifiziert einen höheren Empfangspegel von den Empfangspegeln an den ersten und zweiten Kommunikationsvorrichtungen entsprechend einer abgelaufenen Zeit ab einer Startzeit der Messperiode in den ersten und zweiten chronologischen Daten (DB_1) zu jeder abgelaufenen Zeit ab der Startzeit, und erzeugt dritte chronologische Daten (DZ_1), die den angegebenen Empfangspegel repräsentieren. Das System (1, 1A) zeigt mindestens ein Bild basierend auf den ersten chronologischen Daten (DA_1), ein Bild basierend auf den zweiten chronologischen Daten (DB_1) und ein Bild basierend auf den dritten chronologischen Daten (DZ_1) an oder zeigt diese Bilder ...

Hochfrequenzsignale-führendes Gerät mit äußerst geringer Störstrahlung

Das erfindungsgemäße Hochfrequenzsignale-führende Gerät, insbesondere ein Mess- und/oder Testgerät für Hochfrequenzsignale, umfasst eine Mehrzahl von Hochfrequenzbauggruppen (11-17) zur Erzeugung von Hochfrequenzsignalen. Zur Verminderung der abgestrahlten Störstrahlung sind zwischen den Hochfrequenzbaugruppen (11-17) elektromagnetische Strahlung absorbierende Dämpfungsmatten (20-22) angebracht und/oder die Hochfrequenzbaugruppen sind zumindest teilweise mit einer elektromagnetische Strahlung absorbierenden Dämpfungsmatte (20-22) ummantelt.

Method and system for testing data channel functionally in a radio apparatus

Test equipment

Wireless communication methods and apparatus

Carrier aggregation

Automatic determination and tuning of pico-cell topology for low-power wireless systems

In a cellular radio system, radio resources automatically determine the current cellular topology. The wireless basestations transmit a signal which can be received by all of the basestations in range of the transmitting basestation. Each basestation in the system serially, i.e. one basestation at a time, broadcasts a signal which is received by all other basestations within the range of the transmitting basestation. Each of the receiving radios determines the RSSI (Received Signal Strength Indication) at which they received the transmitted signal. This RSSI value is transmitted to the centre controller which determines the relative locations of the basestations. These values are used to determine which basestations are physically co-located into cells and then determine the relative locations of the cells to each other. ...

Compensation for signal loss between antenna processing unit and modem unit of a subscriber terminal

A subscriber terminal for wireless communication with a central terminal of a wireless telecommunication system has a first signal processing unit 110 associated with an antenna 100, and a second signal processing unit 130 remote from the first and associated with an item of telecommunications equipment 150. A connection medium 120 such as a coaxial cable connects first and second processing units. Calibration logic in the second processing unit controls the first processing unit to send test signals back to the second processing unit so that a signal loss introduced by the coaxial cable on the downlink can be determined and compensated. Uplink signal loss is compensated by sending a test signal from the second processing unit. The first signal processing unit may be mounted outdoors, externally to a subscriber's premises, and the second processing unit located indoors. within the subscriber's premises. Thus the less rugged and more expensive circuitry of the second processing unit is protected ...

Detecting interference in a downlink communication channel

A base transceiver 3 used for radio communication with one or more distant transceiver units 5 (mobile stations) is operable to apply a downlink interference detection mode wherein (i) the base transceiver periodically generates and sends a test signal to the one or more distant transceiver units; (ii) the base transceiver senses whether or not a response signal is sent, possibly within a predetermined time interval, by a distant transceiver in response to receipt of the test signal; and (iii) if no response signal is detected the base transceiver generates an interference detection signal. The base transceiver may further issue an auxiliary control signal to a receiver to initiate identification of the interference level on the downlink channel and possibly distinguish between the following interference conditions: (i) the downlink transmitter has a fault causing noise, (ii) the downlink transmission is subject to interference or (iii) no distant transceiver has received the transmitted ...

Network element, integrated circuit and method of assigning channels

A network element, or a method of controlling an antenna array arrangement, comprises: a plurality of antenna element feeds coupling via an interface with a plurality of radio frequency circuits which are connectable to a plurality of channels and where a signal processor applies a signal to a channel or an antenna element feed and detects the presence of the signal in the feed to at least one antenna element feed or to at least one channel and then records the detected relationships between the antenna element feeds and the channels. The applied signal may be a pilot signal. The recorded relationships can then be used in dynamically assigning and establishing desired signal connections between logical channels and the antenna elements during the operation of an antenna array. The network element and method may form part of an automatic self test system for an active antenna array arrangement. A computer program product may be arranged to perform the method and the physical channels associated ...

Over the air test configuration and method

Over the air test configuration and method

PROCEDURE AND DEVICE FOR EXAMINING VERKEHRS-UND FORWARD CHANNELS IN A WIRELESS DATA COMMUNICATION SYSTEM

SYSTEM AND PROCEDURE FOR THE DETERMINATION OF RADIO FREQUENCY RECEIVER SENSITIVITY

NETZWERKTEILNEHMER FÜR EIN DATENNETZWERK

The transmission channels in the radio data exchange network provide paths for subscribers (1-14), each fitted with at least a transmission or reception function, while a preset number comprise a transceiver function and are usable as stations or transmission channels. Each subscriber in the data network has a transceiver device. Independent claims are included for a determination method for the transmission channel and data exchange.

FADINGSIMULATOR

WIRELESS PERSONAL LOCAL NETWORK

DATA COLLECTION SYSTEM HANDHELD WITH REPLACEABLE MODULES

REGULATION OF ADJOINING CELLS IN A BASIS STATION

DIAGNOSTIC DEVICE FOR A MULTI-ANTENNA ARRAY

Data processing device and data processing method

This technology relates to a data processing device and a data processing method that enable convenience to be further improved when a plurality of transmission formats become available to a transmission frame. A data processing device installed in a transmitting-side facility processes a transmission frame to be transmitted as a broadcast signal to thereby add identification information for identifying the transmission format of the transmission frame, whereas a data processing device installed in a receiving-side facility processes a transmission frame, the transmission format of which is identified, on the basis of identification information added to the transmission frame to be transmitted as a broadcast signal. This technology is applicable, for example, as a method for a test stream.

Determination of neighbour cells in a base station

METHODS AND SYSTEM FOR DETERMINING A DOMINANT IMPAIRMENT OF AN IMPAIRED COMMUNICATION CHANNEL

SYSTEM AND METHOD FOR IDENTIFYING INTERFERERS IN A COMMUNICATION SPECTRUM

A method for identifying interferers in a radio communication band, such as the 2.4 GHz ISM band, uses a priori information of the interferers such as channel structure; channel frequency and channel bandwidth. Measured RSSI cats be used to detect and identify interferers. RSSI measurements can be made at multiple frequencies within a channel of the interferer. Randomization of RSSI measurements improves the likelihood of interferer detection and identification if such interferer is present. Metrics other than RSSI can be used.

TEST FIXTURE FOR ASSEMBLED WIRELESS DEVICES

A fixture for radio frequency ("RF") testing of an assembled wireless device, the wireless device having a removable casing concealing one or more RF spring connectors, the fixture comprising: a retainer for receiving the wireless device with the removable casing removed; a coaxial connector mounted through the retainer, the coaxial connector having a center contact and a shield contact, the coaxial connector for communicating RF test signals through a coaxial cable with external test equipment; a circuit board mounted on an inner side of the retainer and having one or more pads each for receiving one of the center and shield contacts; and, one or more probes mounted on ones of the pads for contacting ones of the RF spring connectors to distribute the RF test signals.

MEASUREMENT OF RF SIGNAL QUALITY PARAMETERS IN THREE DIMENSIONS

A system is presented for collecting measurements of wireless communication parameters throughout an environment. The system includes a wireless vehicle and a test station. The vehicle is configured to move through the environment, and has a radio disposed to receive a test signal and broadcast a reply signal. The test station is configured to wirelessly communicate with and control the wireless vehicle, and includes a test signal transmitter, a reply signal receiver, and a data collection and processing system. The data collection and processing system is configured to calculate wireless signal quality parameters characterizing signal quality between the test station and the vehicle at a plurality of locations of the vehicle as the vehicle moves through the environment, based on difference between the test signal and the reply signal at each location.

STANDING WAVE REDUCTION IN DIRECT FIELD ACOUSTIC TESTING

A direct field acoustic testing system includes at least two acoustical transducer groups and a signal modifier for introducing separately controllable time delays or phase shifts for each acoustical transducer group so as to provide an acoustic field conforming to a pre-determined specification with reduced deviations due to constructive or destructive interference between the acoustical transducer groups.

FULL DUPLEX WIRELESS TRANSMISSION WITH SELF-INTERFERENCE CANCELLATION

A full-duplex transceiver is provided with componentry and methods for cancellation of nonlinear self-interference signals. The transceiver is capable of receiving an incoming radio-frequency signal that includes both a desired radio-frequency signal component and a self-interference component caused by the transceiver's own radio-frequency transmission. The transceiver demodulates the incoming radio-frequency signal to generate a first demodulated signal. The transceiver combines an analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference. The transceiver processes the first and second demodulated signals to determine a desired incoming baseband signal and to determine nonlinear components of the self-interference signal, such as nonlinearities introduced by the transceiver's power amplifier.

SYSTEMS AND METHODS FOR TESTING RADIO-BASED DEVICES

Embodiments are disclosed of a switchplexer for performing test operations on a radio device. The switchplexer comprises a plurality of test ports corresponding to a plurality of radio device ports and a plurality of switches for routing test signals between the individual test ports. Processing logic is disclosed for controlling actuation of the switches to route test signals between individual test ports. The switchplexer disclosed herein may be incorporated into a mobile test device for self-test operations or may be used in a manufacturing or maintenance facility for testing and calibration operations.

HIERARCHICAL COMMUNICATION SYSTEM PROVIDING INTELLIGENT DATA, PROGRAM AND PROCESSING MIGRATION

Système de télécommunications (30) en arbre maximal dans lequel des réseaux (37, 40, 41) de communication par fil ou sans fil présentant des caractéristiques sensiblement différentes font partie d'un schèma général de liaisons entre des ordinateurs portables et mobiles (35, 36). Des copies des données, du code de programmation et des resources de traitement sont acheminées depuis leur source vers les destinations requérantes sur la base de la fréquence demandée, du coût de la liaison et des resources locales de stockage et/ou de traitement disponsibles. Chacun des éléments de réseau de configuration appropriée (33, 35, 36) joue un rôle actif dans le cheminement à travers les réseaux. De plus, des terminaux (43, 44, 45) portables de lecture des codes bidimentionnels (2-D) sont conçus pour pouvoir transmettre des images 2-D comprimées vers des serveurs d'accès stationnaire (33) qui identifient l'image du code par décodage et comparaison avec une banque de données d'images préalablement décodées ...

Procedure for examining a radio link.

Procedure and device for testing the function of a data channel in a portable radio station.

Calibration system for array antenna receiving apparatus

Physical amount monitoring method and circuit configuration

Test apparatus for RF receiver

For determining the intermodulation distortion of method and apparatus

RF communication system functioning diagnosing method, involves detecting whether system functions correctly/not based on verification of whether received RF frame has valid format and identification of power of RF frame

La présente invention concerne un procédé de diagnostic du bon fonctionnement d'un système de communication radiofréquence entre un émetteur RF et un récepteur RF, le dit procédé étant caractérisé en ce que : - on force l'émetteur à émettre une trame radiofréquence à un instant déterminé, - on vérifie lors des étapes suivantes : - a) que la trame radiofréquence a bien été reçue par le récepteur, - b) que la trame reçue par le récepteur présente un format valide, et - c) la puissance de la trame reçue par le récepteur, et - on en déduit si le système de communication fonctionne correctement, et sinon quel élément est en défaut.

TESTING DEVICE MEASURING OF COMMUNICATION LIMIT DISTANCE OF ELECTRONIC DEVICE AND TESTING METHOD THEREOF

FRAME ALIGNMENT OF TEST SIGNALS IN A COMMUNICATION NETWORK

CALIBRAGEM DE SISTEMA DE ANTENA

System and method for testing wide band data packet signal transceivers using narrow band testers

TEST DEVICE, MOBILE RADIO DEVICE AND METHOD FOR TESTING A MOBILE RADIO DEVICE

The invention relates to a method for testing a mobile radio device comprising at least one first antenna (9) and a second antenna (10), and to a mobile radio device (2) and test equipment (1). A signal generation unit (5) of the test equipment (1) generates a test signal (27). The test signal is transmitted to a mobile radio device (2) to be tested and is received by the mobile radio device (2) and evaluated. The mobile radio device (2) then generates a response signal (31) and a transmission schedule (30) for transmitting the response signal via the first antenna (9) and/or the second antenna (10) is defined. The response signal (33) is transmitted according to the transmission schedule and received by the test equipment (1). The transmission schedule used is determined by the test equipment. The transmission schedule (36) used is then determined.

METHOD FOR THE SELF-TESTING OF A REACTIVE RADIO INTERFERER

The invention relates to a method for the self-testing of a reactive radio interferer comprising a plurality of time-synchronized transmitting/receiving lines (C1, C2,...CN), each of which is designed to alternately carry out - monitoring phases (LT) in order to receive the radio spectrum and - interference phases (JAM) in order to transmit an interference signal on the basis of the radio spectrum received in the monitoring phase. According to the invention, one (C1) of the transmitting/receiving lines (C1, C2,...CN) transmits a test signal (TS) within a monitoring phase (LT), said test signal being received and evaluated by at least one other transmitting/receiving line (C2).

TESTING A COMMUNICATIONS APPARATUS

A test arrangement includes a multi-port test interface having a first waveguide coupled to a plurality of second waveguides. The first waveguide is arranged to propagate an input signal and each of the second waveguides is arranged to output the input signal, providing a plurality of test signals to be supplied to a communications apparatus. Such a test interface may also be used to output respective channel signals in a multiplexed signal received from a communications apparatus. The test interface permits the provision and/or monitoring of a large number of channel signals without separate respective connections to the communications apparatus. This may be particularly useful where tests are performed in a constrained space and/or where repeated access to the apparatus is impractical, e.g. in a vacuum chamber. The simultaneous provision of many channel signals may allow evaluation of co-channel interference.

METHOD AND APPARATUS FOR BACKHAUL LINK DIAGNOSTIC IN A WIRELESS REPEATER SYSTEM

The invention discloses a method and apparatus for diagnosing a backhaul communications link between a repeater station (12-1) and a base transceiver station (15-1) of a wireless communication system. Adjacent and co-channel interference can severely degrade the performance of the backhaul communication link. As a result, the conditions on the backhaul link channels can be continually monitored to ensure optimal performance of the link. Each RF channel on the backhaul communication link is individually diagnosed. A signal is then sent over the RF channel (82) and the signal strength is measured (83) along with any adjacent and co-channel interference (83). The measured statistics are then sent back to the base transceiver station (15-1). In a further embodiment of the invention, the power level of an RF carrier signal on the backhaul communication link (84) is measured and the carrier signal is then turned off. The power levels on the adjacent channels above and below are then measured ...

INTEGRATED INTERMODULATION DETECTION SUB-SYSTEM FOR TELECOMMUNICATIONS SYSTEMS

Certain aspects are directed to an intermodulation detection sub-system. The intermodulation detection sub-system includes a test signal generation module, at least one intermodulation detection device, and a controller. The test signal generation module is integrated into a unit of a telecommunications system. The test signal generation module is configured to provide a test signal to a remote antenna unit of the telecommunications system. The intermodulation detection device is integrated into the telecommunications system. The intermodulation detection device is configured to detect intermodulation products generated by mixing a first signal component and a second signal component of the test signal. The controller is integrated into the unit. The controller is configured to control the test signal generation module and the at least one intermodulation detection device.

STANDING WAVE DETECTION METHOD AND DEVICE

The present invention relates to the field of data detection. Provided in an embodiment of the present invention are a standing wave detection method and device, comprising: generating a linear frequency modulation signal; transmitting a transmission signal via a transmitting channel, the transmission signal being the linear frequency modulation signal in an offline test, or being a superimposed signal of a service signal and the linear frequency modulation signal in an online test; receiving a reflected signal generated by the transmission signal during the transmission process; preprocessing the reflected signal; conjugating and multiplying the linear frequency modulation signal and the preprocessed reflected signal to obtain an auto beat signal; performing power spectrum estimation for the auto beat signal, and determining the amplitude and the frequency of the power spectrum peak, the amplitude of the power spectrum peak corresponding to the strength of the standing wave, and the frequency ...

MEASURING METHOD FOR COMMUNICATION DEVICE

La présente invention concerne un procédé de mesure pour un dispositif de communications permettant de réduire les coûts et l'espace de mesure. Une unité centrale (13) donne l'ordre à un générateur de signaux (4) de produire un signal de mesure. Le générateur de signaux (4) produit, selon les instructions reçues, un signal de mesure en modulant un signal audio prédéterminé. Une section de traitement de réception (11) effectue les traitements de réception prédéterminés, notamment le traitement de démodulation du signal de mesure, et produit ensuite le signal démodulé. Par ailleurs, un analyseur basse fréquence (6) mesure une caractéristique du signal démodulé produit par la section de traitement de réception (11), et produit à son tour les résultats de mesure pour l'unité centrale (13). En outre, l'unité centrale (13) affiche les résultats de mesure sur un LCD (12) et règle une caractéristique de la section de traitement de réception (11).

OVER THE AIR MEASUREMENT MODULE

An over the air measurement module comprises an antenna, adapted to receive a first measuring signal from a device under test or to transmit a second measuring signal to the device under test. It also comprises an analog signal processor, directly connected to said antenna, adapted to reduce a frequency of the received first measuring signal, resulting in a frequency reduced first measuring signal, or adapted to increase a frequency of a frequency reduced second measuring signal, resulting in the second measuring signal. It also has a connector connected to said analog signal processor and is adapted to output the first frequency reduced measuring signal or is adapted to receive the second frequency reduced measuring signal.

Enhancing a receiver for improved impairment/fault detection when handling the reception of intermittent signals

One embodiment of a Test Signal generated by Test Signal Synthesis 10 being coupled, by a method of Coupling 12, to an Antenna 14, a Receiver 16 and a Method of Verification 18; for the transmission of a Test Signal to verify the operation of the Receiver Chain of equipment in Applications receiving Intermittent Signals.

Radio frequency communication network having adaptive communication parameters

A radio communication network includes at least one mobile transceiver unit in communication with at least one base transceiver unit that facilitates communicate with at least one host computer for storage and manipulation of data collected by bar code scanners or other data collectors associated with the mobile transceiver units. The radio network implemented by the mobile transceivers and base transceivers adapts to compensate for the wide range of operating conditions by adjusting its operating parameters. Such operating parameters include: the length and frequency of spreading codes employed in direct-sequence spread spectrum communications; hop frame lengths, coding and interleaving in frequency-hopping spread spectrum communications; the method of source encoding used; and the data packet size in a data segmentation communication scheme. The base transceiver is responsive to information contained within transmissions received from the mobile transceiver units in establishing data ...

Ranging system and method thereof

A ranging system and ranging method are provided. The ranging system includes a transmission signal generator which generates a transmission signal, which is transmitted from a transmission device to a reception device; a correction signal generator which converts the transmission signal, which is processed in the reception device and re-input to the transmission device, into a correction signal; a reference signal generator which generates a reference signal, an overlap detector which detects an overlap region between the correction signal and the reference signal; a time calculator which calculates a transmission time of the transmission signal; and a distance calculator which calculates a distance between the devices using the transmission time. The method includes generating a transmission signal; transmitting the transmission signal to a reception device and receiving the signal back again; producing a correction signal; detecting an overlap region between the correction and reference ...

MULTI-GAIN ADAPTIVE LINEAR PROCESSING AND GATED DIGITAL SYSTEM FOR USE IN FLOW CYTOMETRY

Disclosed is an electronic processing system for a flow cytometer that uses a processing chip that processes data in a parallel architecture on a sample by sample basis and provides for high throughput of data. In addition, multi-gain linear amplifiers are used which are matched using feedback circuits to provide accurate data and high resolution data having high dynamic range.

Block sharing using three-way transformers in wireless circuits

A multipath circuit is described that has multiple signal paths and various common components used for normal operation. Each of the multiple signal paths also has multiple circuit blocks defining the functionality of the signal path. A shared access path is provided through the third winding of a three-way transformer for each signal path. Multiple switches are provided in the multipath circuit that couple to the third winding in each of the multiple signal paths. The switches are also coupled to the various common components. Selected ones of these switches may be closed to provide a shared access path between a common component and one of the signal paths or between a common components and one of the circuit blocks in one of the signal paths.

Test equipment and mobile radio device and a method for testing a mobile radio device

The invention relates to a method for testing a mobile radio device comprising at least one first antenna (9) and a second antenna (10), and to a mobile radio device (2) and test equipment (1). A signal generation unit (5) of the test equipment (1) generates a test signal (27). The test signal is transmitted to a mobile radio device (2) to be tested and is received by the mobile radio device (2) and evaluated. The mobile radio device (2) then generates a response signal (31) and a transmission schedule (30) for transmitting the response signal via the first antenna (9) and/or the second antenna (10) is defined. The response signal (33) is transmitted according to the transmission schedule and received by the test equipment (1). The transmission schedule used is determined by the test equipment. The transmission schedule (36) used is then determined.

Communicaton unit, circuit for quadrature sampling error estimation and compensation and method therefor

A communication unit comprises a modem configured to generate a first and second test digital quadrature signal. The modem is configured to: estimate a first sampling error performance associated with a first quadrature path from the first received test digital quadrature signal; estimate a second sampling error performance associated with a second quadrature path from the second received test digital quadrature signal; and generate at least one sampling error compensation signal based on the first estimated sampling error performance and second estimated sampling error performance to be applied to at least one of the receiver and transmitter.

METHODS AND APPARATUSES FOR MEASURING THE DISTANCE TO A PASSIVE INTERMODULATION SOURCE

According to methods of performing measurements to determine a distance to a passive-intermodulation (“PIM”) source, a first RF signal comprising a first frequency and a second RF signal comprising a second frequency may be applied to a device under test. A reference signal comprising a higher-order intermodulation-product of the first frequency and the second frequency may also be generated. An output signal from the device under test and the reference signal may be digitized and a calibration measurement may be applied. A phase difference between the device under test output and the reference signal may be determined. A plurality of phase differences may be determined for multiple first frequencies, and from the plurality of phase differences, a delay may be calculated, which may be multiplied by the velocity of propagation on the medium connecting the device under test to the test equipment to determine a distance to the PIM source. 1. A passive intermodulation (“PIM”) measurement apparatus , comprising:at least one signal generator that is configured to generate a first RF signal and a second RF signal;a test apparatus configured to hold a device under test, the device under test configured to receive the first and second RF signals from the at least one signal generator;a receiver that is coupled to an output of the device under test so as to receive and down-convert an output signal that includes a PIM signal generated by mixing of the first RF signal and the second RF signal within the device under test;a frequency-doubler configured to double a frequency of the first RF signal, resulting in a frequency-doubled first RF signal;a mixer configured to mix the frequency-doubled first RF signal and the second RF signal, resulting in a reference signal; anda processor configured to determine a phase difference between the reference signal and the output signal.2. The apparatus of claim 1 , further comprising first and second image reject mixers configured to down- ...

Wireless full-duplex system and method using sideband test signals

A full-duplex transceiver is provided with componentry and methods for cancellation of nonlinear self-interference signals. The transceiver is capable of receiving an incoming radio-frequency signal that includes both a desired radio-frequency signal component and a self-interference component caused by the transceiver's own radio-frequency transmission. The transceiver demodulates the incoming radio-frequency signal to generate a first demodulated signal. The transceiver combines an analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference. The transceiver processes the first and second demodulated signals to determine a desired incoming baseband signal and to determine nonlinear components of the self-interference signal, such as nonlinearities introduced by the transceiver's power amplifier.

Multi-gain Adaptive Linear Processing and Gated Digital System for Use in Flow Cytometry

Disclosed is an electronic processing system for a flow cytometer that uses a processing chip that processes data in a parallel architecture on a sample by sample basis and provides for high throughput of data. In addition, multi-gain linear amplifiers are used which are matched using feedback circuits to provide accurate data and high resolution data having high dynamic range.

Generalized virtual PIM measurement for enhanced accuracy

An apparatus, method and work product is disclosed. The method comprises measuring plural transmit signals and corresponding receive signals and determining, using a model describing a relation between each of the plural transmit signals and a respective passive intermodulation signal, a standardized passive intermodulation signal as one or more nth order intermodulation products for a standardized transmit signal consisting of two tones each of a power of substantially 20 Watts. The method may also comprise identifying in the model one or more nthorder cross-intermodulation products resulting from three or more transmit signals having different respective carrier frequencies. Responsive to the identification, the method may comprise adapting the standardized two-tone passive intermodulation signal by determining an offset for producing an adapted two-tone standardized passive intermodulation signal, n is an odd integer greater than two.

Time-division duplex (TDD) antenna system

One example includes a self-synchronizing TDD antenna system. The system includes an antenna system to communicate transmit and receive signals and an antenna control circuit coupled to a user communication system. The antenna control circuit includes a transmission line measurement circuit to determine signal loss through a transmission line cable coupled to the antenna system and an amplitude adjustment circuit to adjust amplitude of the transmit and/or receive signals based on the signal loss. A transmit detection circuit monitors signal power of the transmit signal, and a controller switches the amplitude adjustment circuit from a receive mode to a transmit mode in response to the monitored signal power exceeding a predetermined threshold. In the receive mode, the adjustment circuit applies a receive amplitude adjustment to the receive signal, and in the transmit mode the adjustment circuit applies a transmit amplitude adjustment to the transmit signal.

Methods and apparatuses for testing traffic and auxiliary channels in a wireless data communication system on the basis of test packets formed and transmitted according to test settings previously received

Techniques to test performance of terminals and access points in CDMA data (e.g., cdma2000) systems: are based on a framework of protocols and messages provided to support systematic performance testing of terminals and to ensure interface compatibility. The framework comprises a Forward Test Application Protocol (FTAP) for testing forward channels and a Reverse Test Application Protocol (RTAP) for testing reverse channels. Specific methods are defined to test different types of channels (e.g., traffic channels as well as auxiliary channels), on the basis of data transmissions of test packets formed and transmitted according to test settings included in a message previously received.

Testing a communications apparatus

A test arrangement includes a multi-port test interface having a first waveguide coupled to a plurality of second waveguides. The first waveguide is arranged to propagate an input signal and each of the second waveguides is arranged to output the input signal, providing a plurality of test signals to be supplied to a communications apparatus. Such a test interface may also be used to output respective channel signals in a multiplexed signal received from a communications apparatus. The test interface permits the provision and/or monitoring of a large number of channel signals without separate respective connections to the communications apparatus. This may be particularly useful where tests are performed in a constrained space and/or where repeated access to the apparatus is impractical, e.g. in a vacuum chamber. The simultaneous provision of many channel signals may allow evaluation of co-channel interference.

AUTOMATIC DETERMINATION AND TUNING OF PICO-CELL TOPOLOGY FOR LOW-POWER WIRELESS SYSTEMS

A method of using the existing radio resources to automatically determine the current cellular topology is described. Wireless base stations are placed into a mode where they can transmit a signal which can be received by all of the base stations in range of the transmitting base station. Each base station in the system serially broadcast a signal which is received by all other base stations within the range of the transmitting base station. Each of the receiving radios determines the RSSI (Received Signal Strength Indication) at which they received the transmitted signal. The RSSI values are used to determine which base stations are physically co-located into cells and then determine the relative locations of the cells to each other. A method is also described by which the wireless system monitors the mobility traffic of subscribers and makes use of this information to improve the operation of the system. As the user makes use of the mobility features of the system by making and receiving ...

METHODS AND APPARATUS FOR USER EQUIPMENT TO DIFFERENTIATE HUMAN GRIP FROM PROTECTIVE COVERS

TEST INSTRUMENTS AND METHODS FOR COMPENSATING IQ IMBALANCE

A test instrument may include a transmitter configured to transmit signals to a unit under test and a controller configured to generate a transmitter compensation filter by transmitting, via the transmitter, complex multi-sine signals over a first plurality of observed frequencies within a predetermined baseband frequency range, estimating a first plurality of frequency responses that compensate for in-phase and quadrature (IQ) imbalance at the first plurality of observed frequencies within the predetermined baseband frequency range, and determining, using the first plurality of frequency responses, a transmitter polynomial surface.

СПОСОБ УСТРАНЕНИЯ ОШИБКИ УГЛОВОЙ ОРИЕНТАЦИИ АНТЕНН В СИСТЕМЕ СВЯЗИ "ТОЧКА-ТОЧКА"

Изобретение относится к области радиосвязи в миллиметровом диапазоне длин волн и, в частности, к способам устранения ошибки угловой ориентации антенн в системах связи миллиметрового диапазона «точка-точка» с узкими главными лепестками диаграмм направленности. Способ устранения ошибки угловой ориентации антенн в системе связи «точка-точка», состоящей из двух приемопередатчиков, между которыми устанавливается соединение, включает передачу модулированных радиосигналов первым приемопередатчиком; прием сигналов, переданных первым приемопередатчиком, и измерение мощностей принятых сигналов вторым приемопередатчиком. При этом для устранения ошибки угловой ориентации антенны первого приемопередатчика осуществляют: передачу сигналов первым приемопередатчиком с последовательным переключением используемой для передачи диаграммы направленности антенны из множества, состоящего из двух диаграмм с различной угловой ориентацией максимума диаграммы направленности; прием и измерение вторым приемопередатчиком ...

Контрольно-проверочный комплекс для проверки радиосвязного и радионавигационного оборудования

Изобретение относится к автоматизированной контрольно-проверочной технике электрических параметров радиосвязного и радионавигационного оборудования. Комплекс для проверки радиосвязного и радионавигационного оборудования состоит из следующих модулей: компьютер промышленный, источник бесперебойного питания (ИБП), источник питания 115 В 400 Гц, блок измерительный, источник питания постоянного тока, USB концентратор, анализатор спектра, аттенюатор, осциллограф, измеритель мощности, стандарт частоты, генератор высокочастотных сигналов, генератор сигналов специальной формы, преобразователь USB - RS-232, вольтметр универсальный, устройство коммутационное, имитатор отраженных сигналов радиовысотомеров, блок коммутации с аппаратурой речевого оповещения, блок коммутации с бортовыми магнитофонами, блок сопряжения с переговорными устройствами, блок нагрузок переговорных устройств, силовой блок коммутации с радиосвязным оборудованием, блок сопряжения с радиосвязным оборудованием. Технический результат ...

Assessing transmission characteristic of information transmission paths involves sending, evaluating test signals as superimposed frequencies as integral multiples of common fundamental frequency

The method involves transmitting test signals from a signal generator and recording the test signals with a signal analyzer while the generator and analyzer are connected via a reference and test path respectively and evaluating the measurements. The start of test signal transmission and recording are synchronized for both measurements. Test signals are superimpositions of frequencies as integral multiples of a common fundamental frequency. The method involves a first measurement for determining reference measurement values by transmitting test signals from a signal generator (1) and recording the test signals with a signal analyzer (2) while the generator and analyzer are connected via a reference path (R), a second measurement for determining test path (T) measurement values with the generator and analyzer connected via the test path and evaluating the measurements. The start of test signal transmission and recording are synchronized for both measurements and the test signals are superimpositions ...

Digital signal information transmission system - carries out channel parameter estimates at different time points within preamble times

The digital communications method involves periodically transmitting test sequences in a preamble with symbol known at a reception side. From the reception signals a Doppler frequency determination is carried out such that at several different time points an estimate of channel parameters is carried out. The Doppler frequency is determined by comparison of channel parameters estimated at different time points. The estimates of the channel parameters are carried out at different time points within the time duration of a preamble. Pref. the time interval of the different time points is smaller the a period of length of the periodically carried out test sequences. USE/ADVANTAGE - For short wave connections etc., with facility for sufficiently precise Doppler frequency estimate.

Over the air test configuration and method

A method of active testing of wireless devices, such as mobile phone handsets, is disclosed. The wireless device 15 is located in a reverberation chamber 10 with a base station antenna 13. A reference signal 22 generated by a base station emulator 16 is transmitted from the base station antenna to the wireless device. Feedback data from the wireless device is obtained. This enables the performance of the wireless device in a given signal environment to be assessed. The feedback data is optionally reference signal received power (RSRP) or/and reference signal received quality (RSRQ) and may be transmitted wirelessly. A noise antenna 14 driven by a noise generator 18 is an optional feature which enables performance of the downlink to be measured in the presence of noise with a known signal to noise ratio.

System and method for testing multi-user, multi-input/multi-output systems

A test system for testing a multi-input multi-output (MIMO) device under test (DUT) includes: one or more signal processors configured to generate a plurality of independent uplink signals and to apply uplink fading channel characteristics to each of the independent uplink signals to generate a plurality of independent faded uplink test signals; a switch network configured to provide the plurality of independent faded uplink test signals to respective ports for transmission to the MIMO DUT, and further configured to receive via the ports downlink signals from the MIMO DUT; and the one or more signal processors further configured to apply downlink fading channel characteristics to the downlink signals from the MIMO DUT to generate a plurality of downlink faded test signals; and means for determining at least one performance characteristic of the MIMO DUT from the plurality of downlink faded test signals. The test system is particularly suited to testing massive MIMO base stations.

Apparatus for simulating interference transmissions

A simulated interference system is provided wherein an interference signal of an interference source is simulated by a narrow band coded control signal that is transmitted from a control transmitter to a target receiver that is engaged in normal communications. The control signal is received by the target receiver and is applied to an interference injector that is coupled to the antenna of the receiver. The interference injector decodes the control signal and couples a corresponding interference signal to the antenna of the receiver. The interference signal of the interference injector operates to disrupt the normal communications signals that are received by the target receiver.

Calibrating a transceiver circuit

A communication node and a method of changing the operational data of the node

PROCEDURE FOR THE RECOGNITION OF A MONITORING SIGNAL IN A STATIONARY STATION OF A MOBILE TELEPHONE SYSTEM.

HIERARCHICAL COMING UNIVERSITY DOCK CLAY/TONE SYSTEM WITH INTELLIGENT MIGRATION OF DATA, PROGRAMS AND PROCESSING

FRAMEWORK SYNCHRONIZATION OF TESTSIGNALEN IN A COMMUNICATIONS NETWORK WORK

TEST DEVICE AND PORTABLE RADIO EQUIPMENT AS WELL AS PROCEDURE FOR TESTING PORTABLE RADIO EQUIPMENT

PROCEDURE AND DEVICE FOR THE MEASUREMENT OF NONLINEAR EFFECTS IN A COMMUNICATION SYSTEM AND FOR THE CHANNEL SELECTION AFTER THE RESULTS

Methods and apparatus for measuring nonlinear effects in a communication system and for selecting channels on the basis of the results

A test apparatus and a method of testing of an antenna

The present invention teaches a measurement apparatus for the measurement of a test antenna comprising: a movable stand for supporting the test antenna, a feed antenna having a plurality of radiating elements. The movable stand is located at a predefined distance from the feed antenna. An antenna feed system is provided with a plurality of adjustment components for adjusting the phase and amplitude of a wave front from the plurality of radiating elements such that at the distance the wave front is substantially planar.

APPARATUS FOR SIMULATING INTERFERENCE TRANSMISSIONS

ESTIMATING TIME DELAYS IN A SIMULCAST COMMUNICATION SYSTEM

A method for facilitating an equalization of a simulcast signal comprising: (a) receiving a simulcast signal comprising known data simulcast from at least two different sites; (b) generating a number of simulated simulcast signals, each simulated simulcast signal being based on at least two sites transmitting said known data with a presumed time delay, each simulated simulcast signal having a different presumed time delay; (c) determining which of said simulated simulcast signals is an optimum simulated simulcast signal that correlates most closely to said simulcast signal; and (d) providing time delay data of said optimum simulated simulcast signal for use in equalization of said simulcast signal.

AN MSA TRANSCEIVER TESTING DEVICE AND INTERFACE FOR USE THEREWITH

A system for testing transceiver modules associated to different multi-source agreement standards, comprising a transceiver testing device and an interface connection unit. The transceiver testing device comprises a processor for performing at least one testing operation on an MSA transceiver module associated to a certain multi-source agreement standard. The interface connection unit is suitable for connecting the MSA transceiver module to the transceiver testing device. The transceiver module includes a certain type of electrical connector element. The interface connection unit comprises a first connector component and a second connector component. The first connector component is adapted for being removably connecting the interface connection unit to the transceiver testing device. The first connector component is different from the certain type of connector element of the MSA transceiver module. The second connector component is suitable for connecting the interface connection unit ...

METHOD FOR MEASURING PASSIVE INTERMODULATION AND MEASURING DEVICE

The invention relates to a method for measuring intermodulation produced in a measurement segment of a signal transmission path, comprising the following steps: producing a first HF signal (u1(t)) having a predetermined frequency progression and a second HF signal (u2(t)) having a predetermined frequency progression; feeding the first HF signal (u1(t)) and the second HF signal (u2(t)) to the signal transmission path (302), wherein an intermodulation signal is produced in the signal transmission path from the first HF signal (u1(t)) and the second HF signal (u2(t)), which intermodulation signal has a first intermodulation signal component (urPIM(t)) produced in an input segment of the signal transmission path and a second intermodulation signal component (uPIM(t)) produced in the measurement segment (301) of the signal transmission path; producing a compensation signal (uc(t)) in accordance with the first intermodulation signal component (urPIM(t)) produced in the input segment; introducing ...

EVALUATION OF THE FEEDBACK QUALITY IN COMMUNICATIONS SYSTEMS

A measuring system is used for testing a feedback signal transmitted by a communications device within a communications system. The measuring system comprises an antenna system (30) and a measuring device (34). The measuring device (34) transmits a signal to a communications device (31) via the air interface and the antenna system (30). The communications device (31) receives the signal and generates a feedback signal dependent upon transmission conditions of the signal, which it has determined, and transmits it to the measuring device (34). The measuring device (34) measures the actual reception quality of the signal in the communications device (31). In this context, the measuring system implements the following stages: - the measuring device (34) modifies the signal transmitted to the communications device (31) in such a manner that the transmitted feedback signal displays no further possibility for improvement of the transmission conditions; - the transmitted signal and/or the position ...

A METHOD AND A DEVICE FOR TESTING A MOBILE-RADIO DEVICE BY MEANS OF STATIC CHANNEL SIMULATION

The invention relates to a device and to a method for testing a mobile radio device (30) in a multiple antenna system (23, 24, 31, 32) using a frequency-selective static channel model for channel simulation in frequency space. In the method according to the invention, the useful data to be transmitted are first allocated to a plurality of carrier frequencies and the associated coding parameters per antenna. The useful data are then modulated onto the carrier frequencies according to the allocation. One or more modulated carrier signals are now distorted in frequency space according to a frequency-selective static channel model. A transmission signal composed of the channel-modeled modulated carrier signals is subsequently transmitted in the period of time to a mobile radio device to be tested.

SYSTEMS AND METHODS FOR TESTING RADIO-BASED DEVICES

Embodiments are disclosed of a switchplexer for performing test operations on a radio device. The switchplexer comprises a plurality of test ports corresponding to a plurality of radio device ports and a plurality of switches for routing test signals between the individual test ports. Processing logic is disclosed for controlling actuation of the switches to route test signals between individual test ports. The switchplexer disclosed herein may be incorporated into a mobile test device for self-test operations or may be used in a manufacturing or maintenance facility for testing and calibration operations.

RADIO COMMUNICATION APPARATUS WHICH CAN BE TESTED BY RADIO AND OPTICAL TEST SIGNALS

A radio communication apparatus (21) is tested by not only a radio test signal but also an optical test signal. Each test signal carries a test digital data signal. The apparatus has a radio processing section (24, 25) for processing the radio test signal into the test digital data signal. A data processing section (28, 29) processes an input data signal into a processed data signal. Responsive to the processed data signal, an announcing section (30, 31) announces generation of the processed data signal. An optical processing section (32, 27) processes the optical test signal into the digital data signal. Connected to the radio and the optical processing sections and to the data processing section, a selector (26) selects, as the input data signal, one of the test digital data signals produced by the radio and the optical processing sections.

FADING SIMULATOR

A fading simulator for generating multipath-faded test signals which have attenuation notches of precisely controllable frequency position and attenuation depth from a modulated input signal of known bandwith. The input signal is fed to a splitter (10) that directs two in-phase components to a first path (14) and a second path (18). The input to each path is divided by a splitter (22) into in-phase and quadrature sub-signals (24 and 26) having a quadrature phase relationship, each sub-signal being fed to a respective inverting attenuator (28 and 32), the outputs of the attenuators then being combined in a combiner (36) and the combined output being passed through a variable delay line (16) to generate the output of the respective path. The outputs of each path are then combined in a combiner circuit (12) to generate the multipath-faded faded test signal. All four inverting attenuators are preferably substantially identical to one another so that the two paths have close to identical temperature-drift ...

METHOD AND APPARATUS FOR MEASURING NONLINEAR EFFECTS IN A COMMUNICATION SYSTEM AND FOR SELECTING CHANNELS ON THE BASIS OF THE RESULTS

A method and appararatus for accurately determining the operating characteristics or im-pact of nonlinear effects on de-vices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately deter-mine system response. This in-formation can be used by power control loops in controlling or adjusting the operation of non--linear elements or stages such as high power amplifiers in orthog-onal CDMA communication sys-tems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The mea-surements used to formulate the WPR can be made to individual components or to entire systems by injecting communication sig-nals in multiple channels containing data, and leaving at least one empt y channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density ...

СПОСІБ ТА ПРИСТРІЙ ДЛЯ ПЕРЕВІРКИ ТРАФІКА ТА ДОПОМІЖНИХ КАНАЛІВ У БЕЗПРОВІДНІЙ СИСТЕМІ ПЕРЕДАЧІ ДАНИХ (ВАРІАНТИ)

Спосіб та пристрій для перевірки трафіка та допоміжних каналів у безпровідній системі передачі даних (варіанти) стосується тестування продуктивності терміналів і пунктів доступу у системах даних МДКР (наприклад стандарту cdma2000). Відповідно до способу забезпечується структура протоколу і повідомлень для підтримки систематичного тестування продуктивності терміналів і для гарантування сумісності інтерфейсів. Дана структура містить протокол прямого тестового додатку (ППТД) для тестування прямих каналів і протокол зворотного тестового додатку (ПЗТД) для тестування зворотних каналів.

Phase slope reference adapted for use in wideband phase spectrum measurements

METHOD OF TESTING A PATH OF A REPEATER OF A SATELLITE TELECOMMUNICATIONS

MEASURING DEVICE OF A PORTABLE RADIO CHANNEL AND MULTIPLE ANTENNA CORRELATION AND AN OPERATING METHOD THEREOF, CAPABLE OF REDUCING POWER CONSUMPTION

PURPOSE: A measuring device of a portable radio channel and multiple antenna correlation and an operating method thereof are provided to backup information saved in a small-capacity storage media in a large-capacity storage medium. CONSTITUTION: A baseband unit(110) offers a measuring signal to an RF part(120). The baseband unit measures a transmission multiple antenna wireless channel and a receiving multiple antenna radio channel based on the signal received and transmitted from the RF part. The baseband unit measures multiple antenna correlation based on the receiving multiple antenna radio channel. COPYRIGHT KIPO 2010 ...

Method and system for a radio transmission emulator

The present invention relates to a method and system for a radio transmission emulator. In one embodiment, the present invention includes a radio transmission emulator system. The radio transmission emulator system includes a radio transmission emulator, an automobile, and/or a radio data analysis unit. The automobile can include a radio receiving unit. The radio transmission emulator generates a field simulation signal which simulates interferences. The field simulation signal is transmitted from the radio transmission emulator to the radio receiving unit. The radio receiving unit generates the radio data based on the field simulation signal. The radio data analysis unit analyzes the radio data to determine whether adjustments should be made to the radio receiving unit.

Bi-directional, compact, multi-path and free space channel replicator

An apparatus for simulating radio frequency (RF) signal propagation characteristics in a wireless communication network is disclosed. The apparatus includes a first RF terminal and a second RF terminal. A first optical modulator is in electrical communication with the first RF terminal. An optical delay line is in optical communication with the first optical modulator. A first optical demodulator is in optical communication with the optical delay line and in electrical communication with the first RF terminal. A second optical demodulator is in optical communication with the optical delay line and in electrical communication with the second RF terminal. A second optical modulator is in electrical communication with the second RF terminal and in optical communication with the optical delay line.

Systems Methods Circuits and Apparatus for Calibrating Wireless Communication Systems

Disclosed are wireless communication systems and methods for calibrating same. The communication systems may include first wireless transceivers having: (a) a modem, and (b) one or more Radio Frequency (RF) chain pairs. There may also be included a sounding circuit block. A calibrated switchable bridging block (CSBB) may switchably couple signals between the first transceivers and the sounding circuit block. Calibration control logic may regulate signal flow through said CSBB during a sounding sequence of said first wireless transceiver and may apply compensation coefficients to RF compensation circuits functionally associated with said the wireless transceiver RF chain pairs.

Method for testing an amplification path for telecommunications satellite repeater

A method for testing an amplification path of a repeater for a satellite for broadcasting the usable signals, the amplification path making it possible to frequency amplify usable signals from a plurality of communications channels, the channels being situated in a first frequency band, the amplification path being adapted to the first band, wherein the satellite includes a signal generator of a subsystem that enables generation of telemetry data to a second transmission antenna for reception thereof on Earth, the method including defining a test signal that includes the selection of a carrier frequency situated in the first frequency band; configuring the repeater to enable transmission of the signal generated by the signal generator to the amplification path; switching of the test signal amplified via the amplification path to the second transmitting antenna.

Method And Apparatus For Evaluating And Optimizing A Signaling System

A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. An embodiment of the present disclosure may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the present disclosure may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously. 1. An integrated circuit , comprising:circuitry to generate a repeating pattern signal during a test mode;a transmitter to serially transmit a signal to a receiver, the signal comprising a data signal during a normal mode and the repeating pattern signal during the test mode; andcircuitry to change during the test mode at least one parameter affecting transmission of the signal to the receiver, such that the repeating pattern signal is serially transmitted using alternate values of the at least one parameter.2. The integrated circuit of claim 1 , where the at least one parameter includes at least one of a timing parameter of the transmitter or a voltage parameter influencing ability to distinguish logic levels of the data signal at the receiver.3. The integrated circuit of claim 1 , where the at least one parameter comprises a timing offset relative to a timing reference claim 1 , the timing offset used by the transmitter to serially transmit the data signal.4. The integrated circuit of claim 3 , where the circuitry to change the at least one parameter during the test mode ...

Dynamic and configuration based fractional frequency reuse for uneven load distributions

A fractional frequency reuse method for assigning physical resource units of a contiguous frequency band to sectors of cells is disclosed. Each cell includes at least one base station, for transmission of data to users in the sectors The method comprises, for each cell, segmenting the frequency band such that each separate segment includes a first contiguous portion of physical resource units dedicated to all sectors of the cell in vicinities of the center of the cell and a second contiguous portion of physical resource units dedicated for use in only one of the sectors in the cell in an outer area of the cell, assigning each cell with a physical resource unit configuration such that the second contiguous portion of physical resource units of a sector of a given cell partially overlaps with the first contiguous portion of physical resource units in a segment including the second contiguous portion dedicated to the same sector of a cell neighboring the given cell, and transmitting the data to the users in the sectors in accordance with the assigned physical resource unit configurations. Other methods, apparatuses, and systems also are disclosed.

Signal generating method and signal generating device

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.

Wireless transceiver test bed system and method

A system and method for testing wireless transceivers in a virtual wireless environment including emulating an RF environment, creating virtual spectrum users having selectable transmission parameters and physical characteristics and evaluating the operation of the wireless transceiver in the virtual wireless environment.

TEST EQUIPMENT FOR OVER THE AIR TESTS AS WELL AS METHOD FOR TESTING A DEVICE UNDER TEST

A test equipment is provided for over the air tests on a device under test, in particular a user equipment, having a shielded space, at least one signal antenna for transmitting and receiving cellular signals arranged in the shielded space, and a plurality of noise antennas arranged in the shielded space linked in an array configured to create Additive White Gaussian Noise. The noise antennas are equally distributed in three dimensions within the shielded space. Further, a method for testing a device under test is shown. 1. A test equipment for over the air tests on a device under test , comprising a shielded space , at least one signal antenna for transmitting and receiving cellular signals arranged in the shielded space , and a plurality of noise antennas arranged in the shielded space linked in an array configured to create Additive White Gaussian Noise , wherein the noise antennas are equally distributed in three dimensions within the shielded space.2. The test equipment according to claim 1 , wherein the noise antennas are arranged such that the created Additive White Gaussian Noise is spatially white claim 1 , at least at the location of the device under test.3. The test equipment according to claim 1 , wherein the array is configured such that the created Additive White Gaussian Noise is spatially white claim 1 , at least at the location of the device under test.4. The test equipment according to claim 1 , wherein the shielded space is an anechoic chamber or an anechoic room.5. The test equipment according to claim 1 , wherein the signal antenna is at least one of a downlink antenna and a measurement antenna.6. The test equipment according to claim 1 , wherein the test equipment comprises a support for the device under test within the shielded space claim 1 , wherein the support is moveable within the shielded space or spaced equidistantly from at least one of the plurality of noise antennas and corners of the shielded space.7. The test equipment according to ...

Closed-Loop Automatic Channel Selection

A system and method for improving radio performance through automatic channel selection utilizing a closed-channel model is disclosed. A measurement engine records maximum user throughput on a per station basis during normal traffic operation. The measurement engine further records throughput metrics based on test traffic sent to all associated stations during idle operation. A policy logic engine utilizes the measurements to determine an optimal transmission channel for transmission and receipt of data. 1. A method for increasing quality of data transmission in a network having a plurality of transmission channels , the method comprising:determining an actual throughput of each of the plurality of transmission channels, during normal network traffic patterns;transmitting test data to the plurality of transmission channels, during an idle period of the network;measuring a test throughput of each of the plurality of transmission channels, responsive to said transmitting test data;determining transmission channel quality metrics for the plurality of transmission channels responsive to the actual throughputs and the test throughputs;determining whether an available transmission channel of the plurality of transmission channels has better channel quality metrics than the channel quality metrics of a current transmission channel of the plurality of transmission channels being used to transmit data;selecting the available transmission channel when the available transmission channel has a better channel quality metrics than the channel quality metrics of the current transmission channel; andmaintaining the current transmission channel for data communication, when the available transmission channel does not have better channel quality metrics than the channel quality metrics of the current transmission channel.2. The method of claim 1 , further comprising selecting an antenna configuration corresponding to the selected transmission channel to maximize gain of the network.3. ...

MACHINE LEARNING COORDINATED WIRELESS NETWORKING

The disclosed methods and systems use artificial intelligence (AI) and machine learning (ML) technologies to model the usage and interference on each channel. For example, units of the system can measure channel interference regularly over the time of day on all radios. The interference information is communicated to the base unit or a cloud server for pattern analysis. Interference measurements include interference from units within the system as well as interference from nearby devices. The base unit or the cloud server can recognize the pattern of the interference. Further, connected devices have a number of network usage characteristics observed and modeled including bitrate, and network behavior. These characteristics are used to assign channels to connected devices. 1. A method comprising:connecting, by a first access point, a mobile device to a small cell local area network via wireless communication wherein the first access point is one of a plurality of access points communicatively coupled in the small cell local area network;maintaining a device history, by the plurality of access points, of the mobile device, the device history including recorded locations where the mobile device was previously stopped at for at least a threshold period of time;predicting an endpoint of a first movement of the mobile device based on a predetermined degree of similarity between measured features of the first movement and a past movement of the mobile device, wherein the endpoint is a location that the mobile device ceased motion during at an end of the past movement;determining a second access point of the plurality of access points in the small cell local area network based on an identification of an access point of the plurality of access points that has a greatest historical strength of signal to the mobile device at the endpoint; androaming wireless communication of the mobile device, by the first access point, to the second access point of the plurality of access ...

Channel emulation for testing network resources

A device receives fading channel conditions to utilize for simulating behavior of multiple mobile devices in a mobile network, and at least one of the fading channel conditions for at least one of the multiple mobile devices is different than at least another one of the fading channel conditions for at least another one of the multiple mobile devices. The device generates channel realizations based on the fading channel conditions, and the channel realizations include time-discrete and frequency-discrete random channel coefficients. The device generates a test channel based on the generated channel realizations, and provides the test channel to a receiver device of the mobile network. The test channel causes the receiver device to perform functions associated with processing an actual channel.

SELECTIVITY TEST

Testing radio equipment is described wherein an interfering signal is swept in frequency with a step size that is chosen proportional to the bandwidth of the receive channel of the radio equipment. For example, a respective frequency bandwidth (B) is determined of a plurality of receive channels of the radio equipment. A proportionality constant is selected for a frequency step size. For each respective receive channel, interfering radio signals are generated and the interfering radio signals are controlled to stepwise sweep in frequency outside of each respective receive channel. The stepwise sweeping of the interfering frequency is performed with a frequency step size that is a product of the respective bandwidth and the selected proportionality constant. Any spurious response is detected in the respective receive channel. 1. A method for testing radio equipment comprising:sweeping an interfering signal in frequency with a step size that is chosen proportional to the bandwidth of the receive channel of the radio equipment.2. The method of claim 1 , comprising:{'sub': 'Ch', 'determining a respective frequency bandwidth (B) of a plurality of receive channels of the radio equipment;'}selecting a proportionality constant for a frequency step size;generating, for each respective receive channel, interfering radio signals and controlling the interfering radio signals to stepwise sweep in frequency outside of each respective receive channel, where the stepwise sweeping of the interfering frequency is performed with a frequency step size that is a product of the respective bandwidth and the selected proportionality constant; anddetecting any spurious response in the respective receive channel.3. The method of claim 2 , wherein the selection of the proportionality constant for a frequency step size comprises selecting a value that is less than or equal to ½.4. The method of claim 2 , wherein the selection of the proportionality constant for a frequency step size comprises ...

ADJUSTING BACKHAUL AND FRONTHAUL COMMUNICATIONS IN A WIRELESS MESH NETWORK

Adjusting backhaul and fronthaul communication links of wireless mesh networks are described. A wireless mesh network has a topology including fronthaul communication links and backhaul communication links. In one aspect, characteristics of network data packets transmitted within a wireless mesh network can be identified. Based on those characteristics, the topology of the wireless mesh network can change. 1. A method for adjusting communication links of a wireless mesh network , comprising:determining, by a first computing node of the wireless mesh network, characteristics of network data packets associated with a first client device of the wireless mesh network, the wireless mesh network having a topology including a first fronthaul communication link between the first computing node and the first client device and a first backhaul communication link between the first computing node and a second computing node of the wireless mesh network; andchanging, by the first computing node, the topology of the wireless mesh network based on the characteristics of the network data packets.2. The method of claim 1 , wherein changing the topology of the wireless mesh network includes establishing a least one of a second backhaul link between the first computing node and a third computing node or a third backhaul link between the second computing node and the third computing node and disconnecting the first backhaul communication link between the first computing device and the second computing device.3. The method of claim 2 , wherein changing the topology of the wireless mesh network includes establishing a second backhaul link between the first computing node and the third computing node claim 2 , establishing the third backhaul link between the second computing node and the third computing node claim 2 , and disconnecting the first backhaul communication link between the first computing device and the second computing device.4. The method of claim 1 , wherein changing the ...

MIMO WIDEBAND RECEIVER AND TRANSMITTER, AND METHOD THEREOF

In aspect, the disclosure includes a method of configuring a MIMO wideband receiver. The method would include estimating, on a SISO basis, a set of post-processing parameters for a plurality of receiver channels; receiving, by each of the plurality of receiver channels, a first test signal which is transmitted from a first transmitter channel on a MIMO basis; calculating a first set of crosstalk parameters in response to receiving the first test signal; receiving, by each of the plurality of receiver channels, a second test signal which is transmitted from a second transmitter channel on the MIMO basis; calculating a second set of crosstalk parameters in response to receiving second test signal; and calculating the set of post-processing parameters based on the first set of crosstalk parameters and the second set of crosstalk parameters by cancelling a crosstalk interference among plurality of receiver channels. 1. A method of configuring a multi-input multi-output (MIMO) wideband receiver comprising:estimating, on a single-input and single-out (SISO) basis, a set of post-processing parameters for a plurality of receiver channels;receiving, by each of the plurality of receiver channels, a first test signal which is transmitted from a first transmitter channel on a MIMO basis;calculating a first set of crosstalk parameters in response to receiving the first test signal;receiving, by each of the plurality of receiver channels, a second test signal which is transmitted from a second transmitter channel on the MIMO basis;calculating a second set of crosstalk parameters in response to receiving second test signal; andcalculating the set of post-processing parameters based on the first set of crosstalk parameters and the second set of crosstalk parameters by cancelling a crosstalk interference among plurality of receiver channels.2. The method of claim 1 , wherein estimating claim 1 , on the SISO basis claim 1 , the set of post-processing parameters for the plurality of ...

Reverse coupler for transceiver devices

An electronic device may include a feedback circuit that may determine an error of a first signal to be transmitted to a second electronic device. The electronic device may also include a transceiver that may adjust the first signal based on the error and send the adjusted first signal to the second electronic device. The electronic device may also include a coupler circuitry configured to route a second signal received from the second electronic device or a third electronic device to the feedback circuit, such that the feedback circuit may determine one or more properties associated with the second signal.

Electrical in-system process control tester

A tester apparatus includes a wireless network interface and a device-under-test interface; and a processor, in communication with the network interface and the device-under-test interface. The processor is programmed to identify parameters of an electrical test from a remote server via the wireless network interface, perform the electrical test to an assembly electrically connected to the device-under-test interface, and report results of the electrical test to the remote server via the wireless network interface. A server may be in wireless communication with the tester apparatus and a station of an assembly line via a network access point. The server is programmed to send parameters of an electrical test of an assembly to the tester apparatus; receive test results from the tester apparatus, the test results indicating a wiring connection fault; and graphically display a fault indication overlaid on an image of the assembly to indicate location of the wiring fault.

CROSS-RELAY INTERFERENCE MITIGATION IN WIRELESS RELAYS THAT SERVE WIRELESS USER DEVICES

In a wireless communication relay, a network transceiver wirelessly detects wireless access points. The network transceiver beamforms wireless test signals and wirelessly transmits the beamformed wireless test signals to the wireless access points. A user transceiver in the relay wirelessly detects cross-relay interference levels when the network transceiver wirelessly transmits the beamformed wireless test signals to the wireless access points. The user transceiver transfers the cross-relay interference levels for the wireless access points to the network transceiver. The network transceiver selects one of the wireless access points based on the cross-relay interference levels for the wireless access points. The network transceiver wirelessly exchanges user data with the selected one of the wireless access points and exchanges the user data with the user transceiver. The user transceiver exchanges the user data with the network transceiver and wirelessly exchanges the user data with the wireless user devices. 1. A method of operating a wireless communication relay comprising a user transceiver and a network transceiver , the method comprising:a network transceiver wirelessly detecting wireless access points, beamforming wireless test signals, and wirelessly transmitting the beamformed wireless test signals to the wireless access points;the user transceiver wirelessly detecting cross-relay interference levels when the network transceiver wirelessly transmits the beamformed wireless test signals to the wireless access points and transferring the cross-relay interference levels for the wireless access points to the network transceiver;the network transceiver selecting one of the wireless access points based on the cross-relay interference levels for the wireless access points;the network transceiver wirelessly exchanging user data with the selected one of the wireless access points and exchanging the user data with the user transceiver; andthe user transceiver ...

TRANSCEIVER ARRAY

Each of a plurality of modules comprises a respective one of a plurality of antenna elements, and each of a subset of the plurality of modules comprising a respective one of a plurality of transceivers, wherein the plurality of modules are interconnected via one or more communication links. The circuitry may be operable to receive a calibration signal via the plurality of antenna elements, determine, for each one of the antenna elements, a time and/or phase of arrival of the calibration signal, calculate, based on the time and/or phase of arrival of the calibration signal at each of the plurality of antenna elements, electrical distances between the plurality of antenna elements on the one or more communication links, and calculate beamforming coefficients for use with the plurality of antenna elements based on the electrical distances. 120-. (canceled)21. A system comprising: a receiver operable to receive a calibration signal according to one or more of the plurality of antenna elements; and', a time and/or phase of arrival of the calibration signal;', 'one or more distances between the plurality of antenna elements according to the time and/or phase of arrival of the calibration signal; and', 'one or more beamforming coefficients for use with the plurality of antenna elements according to the one or more distances., 'a processor operable to generate], 'a primary transceiver operably coupled to a plurality of secondary transceivers, wherein the primary transceiver and the plurality of secondary transceivers are operably coupled to a plurality of antenna elements, and wherein the primary transceiver comprises22. The system of claim 21 , wherein the calibration signal is a signal from a mobile terminal in a coverage area served by the primary transceiver and/or the plurality of secondary transceivers.23. The system of claim 21 , wherein the primary transceiver is configurable into a transmit mode and a receive mode.24. The system of claim 21 , wherein:the primary ...

Multicast aided cooperative beamforming wireless system

A cooperative wireless system using a multicast protocol to facilitate coordinating coherent addition and subtraction of wireless signaling or other beams originating from a plurality of antenna units at a target location is contemplated. The system may utilize multicast-based regulation and distribution of transmission control parameters necessary for the antenna units to synchronize the wireless signaling in a manner sufficient to enable the coherent addition and subtraction thereof at the target location.

MIRROR SIGNAL IQ-IMBALANCE CORRECTION

A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal produced in the receiver from the conveyed Test Signal can be measured. In the absence of an IQ-imbalance, the Test Signal can be completely eliminated in the receiver and the corresponding measured power of the produced signal can be minimized. Accordingly, a two dimensional algorithm is described for calibrating a receiver and correcting the IQ-imbalance by adjusting the phase and gain difference between the I and Q channels in the receiver based on the measured power of the signal produced in the receiver. 1a low-IF receiver configured to be tunable for selected channels;a synthesizer configured to produce a Test Signal in mirror frequencies for a selected channel and for conveying the Test Signal to the receiver; andan IQ Imbalance Estimator configured for estimating a phase imbalance and a gain imbalance in the receiver based on a signal produced in the receiver from the Test Signal.. A system comprising: This application is a continuation of allowed U.S. application Ser. No. 14/630,531 entitled “MIRROR SIGNAL IQ-IMBALANCE CORRECTION,” filed Feb. 24, 2015, which is a continuation of allowed U.S. application Ser. No. 13/960,584 entitled “MIRROR SIGNAL IQ-IMBALANCE CORRECTION,” filed Aug. 6, 2013, which is a continuation of U.S. application Ser. No. 13/093,145 entitled “MIRROR SIGNAL IQ-IMBALANCE CORRECTION,” filed Apr. 25, 2011, of which the full disclosure of these applications is incorporated herein by reference for all purposes.A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright ...

Passive intermodulation testing using pulse stimulus

Disclosed is a passive intermodulation (PIM) test system having a pulsed signal generator configured to generate and apply a pulsed stimulus signal to a device under test. The PIM test system is further configured to measure a power of at least one PIM product generated by a PIM source in the device under test using the pulsed stimulus signal. Also disclosed in a method for Cevaluating PIM in a device under test, the method includes using a pulsed stimulus signal to measure a power of at least one PIM product generated by a PIM source in the device under test.

MEASUREMENT APPARATUS

A measurement apparatus comprising a first terminal to receive an input signal of a circuit under test; a second terminal to receive an output signal of the circuit under test. A first and second phase splitter configured to generate a first and second phase signal, I and I, and a first and second quadrature signal, Q and Q. A first and second multiplexer, each coupled to the first terminal and the second terminal and configured to alternately pass the input and output signals of the circuit under test to the inputs of the first and second phase splitters. A double-quadrature mixer having four inputs configured to receive I, Q, I, and Q, and an output. A calculation unit to determine one or both of a phase shift of the circuit under test and/or a gain of the circuit under test based on the output of the double-quadrature mixer. 1. A measurement apparatus comprising:a first terminal for coupling to a circuit under test to receive a first signal representative of the input signal to said circuit under test;a second terminal for coupling to the circuit under test to receive a second signal representative of output from said circuit under test;{'b': 1', '1, 'a first phase splitter configured to generate, based on the signal provided at an input of said first phase splitter, a first phase signal, I, and a first quadrature signal, Q, said first quadrature signal in quadrature with said first phase signal;'}{'b': 2', '2, 'a second phase splitter configured to generate, based on the signal provided at an input of said second phase splitter, a second phase signal, I, and a second quadrature signal, Q, said second quadrature signal in quadrature with said second phase signal;'}a first multiplexer coupled to the first terminal and the second terminal and configured, in a first mode of the first multiplexer, to pass the first signal to the input of the first phase splitter and, in a second mode of the first multiplexer, to pass the second signal to the input of the first phase ...

Integrated Wireless Communication Test Environment

An apparatus for testing electromagnetic components includes electromagnetically-isolating external walls that define a chamber. An internal wall is attached to one or more of the electromagnetically-isolating external walls to form an internal test instrument chamber and an internal device testing chamber. An internal RF feed-through port passes through the internal wall to electrically couple a test instrument disposed in the internal test instrument chamber to a wireless device-under-test (DUT) disposed in the internal device testing chamber. One or more external RF feed-through ports can pass through one of the electromagnetically-isolating external walls to electrically couple the DUT and/or the test instrument to a second wireless device. 1. An apparatus for testing wireless devices , comprising:electromagnetically-isolating external walls that define a chamber;an internal wall attached to one or more of the electromagnetically-isolating external walls to form an internal test instrument chamber and an internal device testing chamber; andan internal RF feed-through port that passes through the internal wall to electrically couple a test instrument disposed in the internal test instrument chamber to a wireless device-under-test (DUT) disposed in the internal device testing chamber.2. The apparatus of claim 1 , further comprising an external RF feed-through port that passes through one of the electromagnetically-isolating external walls to electrically couple the DUT to a second wireless device.3. The apparatus of claim 2 , wherein the external RF feed-through port is disposed on a perimeter of the internal device testing chamber.4. The apparatus of claim 1 , wherein the electromagnetically-isolating external walls comprise an electrically-conductive material.5. The apparatus of claim 4 , wherein the electrically-conductive material comprises steel.6. The apparatus of claim 1 , wherein the internal and external RF feed-through ports are electrically coupled to ...

Distributed system for radio frequency environment simulation

A method and system for measuring a device under test are disclosed. In some embodiments, a method of implementing a measurement system is provided. The method includes providing a plurality of nodes, each node including a combination of a communication tester configured to generate a communication signal and a channel emulator configured to emulate a channel, and providing a user interface configured to enable a user to control at least one of the plurality of nodes.

Measuring device and measuring method for start time synchronized signal generation

A measuring system comprises a timing unit and at least two signal generators. The signal generators are each configured to generate a measuring signal and to supply it to a device under test. The timing unit is configured to generate start time signals, which each indicate an allowed start time of the measuring signals. Said signal generators are configured to only start generating the measuring signals at least instances of start time signals.

DISTRIBUTED SYSTEM FOR RADIO FREQUENCY ENVIRONMENT SIMULATION

A method and system for measuring a device under test are disclosed. In some embodiments, a method of implementing a measurement system is provided. The method includes providing a plurality of nodes, each node including a combination of a communication tester configured to generate a communication signal and a channel emulator configured to emulate a channel, and providing a user interface configured to enable a user to control at least one of the plurality of nodes. 1. A method of implementing a measurement system , the method comprising:providing a plurality of nodes, each node including a combination of a communication tester configured to generate a communication signal and a channel emulator configured to emulate a channel; andproviding a user interface configured to enable a user to control at least one of the plurality of nodes.2. The method of claim 1 , further comprising providing signal communication with the plurality of nodes to synchronize the communication testers in time.3. The method of claim 1 , further comprising providing signal communication with the plurality of nodes to synchronize the communication testers in content.4. The method of claim 1 , further comprising locating the plurality of nodes within a test chamber.5. The method of claim 1 , wherein the communication signals are digital signals.6. The method of claim 1 , further comprising including at each node claim 1 , an antenna.7. The method of claim 6 , further comprising disposing the nodes about a test volume.8. A method of implementing a measurement system claim 6 , the method comprising:providing a plurality of nodes, each node having a combination of a channel emulator configured to receive and impair a communication signal and a communication tester configured to receive an impaired communication signal; andproviding a user interface configured to enable a user to control at least one of the plurality of nodes.9. The method of claim 8 , further comprising locating the plurality of ...

Distributed system for radio frequency environment simulation

A method and system for measuring a device under test are disclosed. In some embodiments, an electromagnetic measurement system to test a device under test, DUT is provided. The system includes, at a central location, an emulator core configured to introduce an impairment in each of at least one transmit signal to produce a digital impaired signal; and at a remote location, a transmitter configured to convert the digital impaired signal to an analog RF signal.

DISTRIBUTED SYSTEM FOR RADIO FREQUENCY ENVIRONMENT SIMULATION

A method and system for measuring a device under test are disclosed. Some embodiments include a distributed channel emulation system implementing a downlink channel, including at a central location, an emulator core configured to introduce an impairment in each of at least one transmit signal to produce at least one impaired signal for each of at least one emulated channel. The system includes, at a remote location, for each of at the least one emulated channel, an up-converter configured to up-convert an impaired signal of the emulated channel to produce a radio frequency, RF, signal. 120-. (canceled)21. An electromagnetic measurement system to test a device under test (DUT) the DUT in communication with a plurality of antennas , the system comprising: a first emulator core configured to introduce an impairment in each of at least one digital signal to produce an impaired signal; and', a transmitter configured to convert the impaired signal from the emulator core to a radio frequency (RF) signal to be transmitted by the antenna to the DUT; and', 'a receiver configured to convert an RF signal received from the antenna from the DUT to a down converted digital signal to be impaired by the first emulator core;, 'at least one of], 'at a remote location within a test chamber in proximity to an antenna of the plurality of antennas receive and process the impaired signal from the receiver; and', 'generate and transmit a communication signal to be impaired by the first emulator core; and, 'a wireless communication tester configured to at least one of, 'at a central location exterior to the test chamber remote from the antenna of the plurality of antennasan interface between the first emulator core at the remote location and the wireless communication tester at the central location, the interface providing at least one of a digital to RF converter applied to the impaired signal and an RF to digital converter applied to the communication signal.22. (canceled)23. The system of ...

DISTRIBUTED SYSTEM FOR RADIO FREQUENCY ENVIRONMENT SIMULATION

In some embodiments, an electromagnetic measurement system to test a device under test, DUT, in a chamber is provided. Within the chamber, for each of at least one emulated channel, a first emulator core is configured to introduce an impairment in each of at least one transmit signal to produce an impaired signal, and a transmitter is configured to convert the impaired signal to a radio frequency, RF, signal to be transmitted by an antenna. 120-. (canceled)21. An electromagnetic measurement system to test a device under test , DUT , the system comprising: a communication tester configured to at least one of generate a communication signal and receive an impaired communication signal; and', 'a channel emulator configured to emulate a channel by introducing impairments to the communication signal; and, 'a plurality of nodes, each node within an anechoic chamber in proximity to and in communication with a different antenna, each node including a combination of 'a controller to provide control signals to at least one of the communication tester and the channel emulator.', 'exterior to the anechoic chamber and remote from the plurality of nodes;'}22. The system of claim 21 , wherein the communication testers in the plurality of nodes are synchronized in time via control signals.23. The system of claim 21 , wherein the communication testers are synchronized in content via control signals.24. The system of claim 21 , further comprising an antenna coupled to each channel emulator.25. The system of claim 21 , wherein the communication signal generated by the communication tester is at baseband.26. The system of claim 21 , wherein the impaired signals from the channel emulator are sent to additional nodes.27. The system of claim 21 , wherein the channel emulator receives impaired signals from additional nodes.28. The system of claim 21 , wherein control signals synchronize the channel emulators in content.29. An electromagnetic measurement system to test a device under test ...

DISTRIBUTED SYSTEM FOR RADIO FREQUENCY ENVIRONMENT SIMULATION

In some embodiments, an electromagnetic measurement system to perform radio frequency, RF, downlink testing of a device under test, DUT, in a chamber is provided. Exterior to the chamber is an emulator core configured to introduce an impairment in each of at least one transmit signal to produce at least one impaired signal for each of at least one emulated channel. Within the chamber, for each of the at least one emulated channel, an up-converter is configured to up-convert an impaired signal of the emulated channel to produce a radio frequency, RF, signal. 2. The system of claim 1 , wherein the chamber is one of an anechoic chamber and a reverberation chamber.3. The system of claim 1 , wherein an impairment includes at least one of an amplitude weighting and a temporal shift.4. The system of claim 1 , further comprising claim 1 , exterior to the chamber claim 1 , for each of the at least one emulated channel claim 1 , a digital to analog converter to convert an impaired signal from the emulator core from a digital form to an analog form.5. The system of claim 1 , further comprising claim 1 , within the chamber claim 1 , for each of the at least one emulated channel claim 1 , a variable gain amplifier configured to adjustably amplify the RF signal.6. The system of claim 1 , wherein claim 1 , to up-convert the impaired signal claim 1 , the impaired signal is mixed with a local oscillator claim 1 , LO claim 1 , signal claim 1 , the impaired signal being one of an intermediate frequency claim 1 , IF claim 1 , signal and a baseband signal.7. The system of claim 1 , further comprising claim 1 , within the chamber claim 1 , for each of the at least one emulated channel:a digital to analog converter, DAC, configured to convert an impaired signal from a digital form to an analog form such that the analog form of the impaired signal is up-converted.8. An electromagnetic measurement system to test a device under test claim 1 , DUT claim 1 , in a chamber claim 1 , the system ...

Calibration systems and methods

A calibration system for calibrating an antenna array comprising a plurality of antenna elements comprises a signal generator for generating a predetermined test signal and, the signal generator being couplable to the antenna elements for providing the test signal to the antenna elements, a number of probes for measuring at least one physical parameter, which is influenced by emissions of the antenna elements, and providing respective measurement signals, and a position determination unit for determining based on the measurement signals the positions of the antenna elements as calibrated positions.

CALIBRATION SYSTEMS AND METHODS

A calibration system for calibrating a radio frequency, RF, device comprising a plurality of signal paths, each signal path comprising at least an amplifier and an antenna element, comprises a measurement system for driving the signal paths with a predetermined test signal and measuring an output of the signal paths in response to the test signal, a determination module for determining a first signal path, of which the antenna element provides the lowest output of all antenna elements, and a correction factor calculator for calculating based on output of the first signal path a correction factor for the further signal paths such that with the applied correction factor the output of all signal paths is equal within a predetermined acceptance interval. 1. A calibration system for calibrating a radio frequency , RF , device comprising a plurality of signal paths , each signal path comprising at least an amplifier and an antenna element , the system comprising:a measurement system for driving the signal paths with a predetermined test signal and measuring an output of the signal paths in response to the test signal,a determination module for determining a first signal path, of which the antenna element provides the lowest output of all antenna elements, anda correction factor calculator for calculating based on output of the first signal path a correction factor for the further signal paths such that with the applied correction factor the output of all signal paths is equal within a predetermined acceptance interval.2. The calibration system of claim 1 , wherein the measurement system measures a physical parameter claim 1 , which is influenced by emissions of the antenna elements in response to the test signal claim 1 , in front of the antenna elements as the output and provides respective measurement values.3. The calibration system of claim 2 , wherein the determination module comprises a identification unit claim 2 , for identifying the values of the measurement data ...

APPARATUS AND METHODS FOR TESTING PATCH ANTENNAS

Apparatus and methods for testing of patch antennas are provided herein. In certain configurations, a method of electronic testing of patch antennas is provided. The method includes positioning a patch antenna onto a test fixture, coupling a test signal from a first probe to the patch antenna, coupling the test signal from the patch antenna to a second probe, and measuring one or more electrical parameters of the patch antenna based on an amount of coupling of the test signal from the first probe to the second probe via the patch antenna. Thus, patch antennas can be measured via a non-destructive process, in which no direct electrical connection to the patch antenna's planar antenna element is needed. 1. A method of electronic testing of patch antennas , the method comprising:positioning a patch antenna onto a test fixture;coupling a test signal from a first probe to the patch antenna, the first probe including a first central conductor extending through a first opening of the test fixture;coupling the test signal from the patch antenna to a second probe, the second probe including a second central conductor extending through a second opening of the test fixture; andmeasuring one or more electrical parameters of the patch antenna based on an amount of coupling of the test signal from the first probe to the second probe via the patch antenna.2. The method of further comprising providing the test signal to the first probe using a signal analyzer claim 1 , and analyzing a response of the patch antenna to the test signal via the second probe using the signal analyzer.3. The method of wherein measuring one or more electrical parameters of the patch antenna includes measuring a quality factor of the patch antenna.4. The method of wherein measuring one or more electrical parameters of the patch antenna includes measuring a bandwidth of the patch antenna.5. The method of wherein measuring one or more electrical parameters of the patch antenna includes measuring a center ...

Adapting serdes receivers to a ufs receiver protocol

A method for receiving data using an FPGA receiver circuit comprises receiving payload data from a DUT using a first rate of a plurality of line rates during a first burst, wherein the DUT is communicatively coupled to the FPGA receiver circuit. The method further comprises transitioning to a power saving state at an end of the first burst and receiving synchronization data from the DUT using a second rate of a plurality of line rates during a second burst. Further, the method comprises establishing synchronization with a clock data recovery (CDR) circuit of the FPGA receiver circuit at the second rate and receiving payload data from the DUT at the second rate.

Test chamber parasitic channel equalization

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver device may receive, from a tested device, a set of sounding reference signals for a testing procedure of a test chamber; determine a set of parameters of a parasitic channel of the test chamber based at least in part on a response of a set of subcarriers of the set of sounding reference signals; determine a transmission equalization matrix based at least in part on the parameters of the parasitic channel; and equalize one or more subsequent transmissions using the transmission equalization matrix. Numerous other aspects are provided.

DATA TRANSMISSION APPARATUS FOR CHANGING CLOCK SIGNAL AT RUNTIME AND DATA INTERFACE SYSTEM INCLUDING THE SAME

In an example embodiment, a data transmission apparatus includes a transmission link module configured to generate a reference clock signal and a transmission D-PHY module. The transmission D-PHY module includes a first phase locked loop configured to receive the reference clock signal, and generate a first clock signal. The transmission D-PHY module further includes a second phase locked loop configured to receive the reference clock signal, and generate a second clock signal having a different frequency than the first clock signal. The transmission D-PHY module further includes a multiplexer configured to select and output one of the first and second clock signals as a clock signal according to a selection signal. The transmission D-PHY module further includes a data transmitter configured to convert parallel data into serial data in response to the clock signal for transmission to a receiver. 1. A data transmission apparatus comprising:a transmission link module configured to generate a reference clock signal; and [ receive the reference clock signal, and', 'generate a first clock signal,, 'a first phase locked loop configured to,'}, receive the reference clock signal, and', 'generate a second clock signal having a different frequency than the first clock signal,, 'a second phase locked loop configured to,'}, 'a multiplexer configured to select and output one of the first and second clock signals as a clock signal according to a selection signal, and', 'a data transmitter configured to convert parallel data into serial data in response to the clock signal for transmission to a receiver., 'a transmission D-PHY module, the transmission D-PHY module including,'}2. The data transmission apparatus of claim 1 , wherein the transmission link module comprises:a multiplexer selection logic configured to output the selection signal to the multiplexer in response to a clock change request.3. The data transmission apparatus of claim 2 , wherein the first phase locked loop is ...

Wireless Full-Duplex System and Method Using Sideband Test Signals

A full-duplex transceiver is provided with componentry and methods for cancellation of nonlinear self-interference signals. The transceiver is capable of receiving an incoming radio-frequency signal that includes both a desired radio-frequency signal component and a self-interference component caused by the transceiver's own radio-frequency transmission. The transceiver demodulates the incoming radio-frequency signal to generate a first demodulated signal. The transceiver combines an analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference. The transceiver processes the first and second demodulated signals to determine a desired incoming baseband signal and to determine nonlinear components of the self-interference signal, such as nonlinearities introduced by the transceiver's power amplifier. 1. A full-duplex transceiver comprising:a radio-frequency transmit chain operative to generate a combined radio-frequency signal including an outgoing radio-frequency communication signal having a center frequency, and a first radio-frequency test signal having a center frequency different from the center frequency of the outgoing radio-frequency communication signal;a power amplifier operative to amplify the combined radio-frequency communication signal;a transmit antenna operative to transmit the combined radio-frequency communication signal;a receive antenna operative to receive an incoming radio-frequency signal, wherein the incoming radio-frequency signal includes a radio-frequency test component caused by the transmitted first radio-frequency test signal and a self-interference component caused by the transmitted radio-frequency communication signal;a radio-frequency demodulator operative to demodulate at least the radio-frequency test component to obtain a demodulated test component;an analog-to-digital converter operative to sample the demodulated test component; anda digital decoding module ...

MEASUREMENT SYSTEM AND A METHOD

A measurement system for measuring signals in a RF device comprises at least two signal generators for generating a test signal in each one of the signal generators, a probe for every signal generator, each probe being connected to the respective signal generator for emitting the respective test signal to the RF device, and a controllable positioner for rotatably positioning the RF device with respect to the probes. 1. A measurement system for measuring signals in a RF device , the measurement system comprising:at least two signal generators for generating a test signal in each one of the signal generators;a probe for every signal generator, each probe being connected to the respective signal generator for emitting the respective test signal to the RF device; anda controllable positioner for rotatably positioning the RF device with respect to the probes.2. The measurement system of claim 1 , comprising a data recorder for recording at least the signal strengths of the test signals received at the RF device.3. The measurement system of claim 1 , wherein the probes are rotatable around a first axis.4. The measurement system of claim 3 , wherein the RF device is positioned on the first axis.5. The measurement system of claim 3 , wherein the distance of the probes to the axis is configurable.6. The measurement system of claim 1 , wherein at least one of the test signals characterizes a signal received by the RF device via a direct line of sight.7. The measurement system of claim 1 , wherein at least one of the test signals characterizes a signal received by the RF device indirectly via reflection and/orwherein every test signal characterizes a signal emitted from a single signal source to the RF device via diverging paths or emitted from different signal sources to the RF device.8. The measurement system of claim 1 , wherein the positioner comprises a mechanical arm with three degrees of freedom.9. The measurement system of claim 1 , wherein the positioner comprises a ...

MULTIDIMENSIONAL GRID SAMPLING FOR RADIO FREQUENCY POWER FEEDBACK

The described technology is generally directed towards multidimensional grid sampling for radio frequency power feedback. A mobile device can sample radio frequency signal power at multiple sample points, and can send sample values to a base station. The multiple sample points can be defined with reference to a grid having a first dimension and a second dimension, such as time and frequency, or delay and Doppler. A variety of techniques are provided to define the multiple sample points. 1. A method , comprising:receiving, by a device comprising a processor, a sample definition;using, by the device, the sample definition to identify sample points,wherein the sample points are identified using first dimension parameters and second dimension parameters applicable to a sample grid comprising a first dimension and a second dimension; andsampling, by the device, radio frequency signal power at the sample points,wherein the sampling produces sample data comprising radio frequency signal power measurements at the sample points.2. The method of claim 1 , wherein the device is a mobile device claim 1 , and further comprising sending claim 1 , by the mobile device claim 1 , the sample data to a base station.3. The method of claim 1 , further comprising compressing claim 1 , by the device claim 1 , the sample data.4. The method of claim 1 , further comprising transforming claim 1 , by the device claim 1 , the sample data.5. The method of claim 1 , wherein the first dimension is time the second dimension is frequency.6. The method of claim 1 , wherein the first dimension is delay and the second dimension is Doppler.7. The method of claim 1 , wherein the first dimension parameters comprise a sample period parameter.8. The method of claim 1 , wherein the first dimension parameters comprise a sample span parameter.9. The method of claim 1 , wherein the first dimension parameters comprise a sample number parameter.10. The method of claim 1 , wherein the first dimension parameters ...

Antennas-in-package verification board

An antennas-in-package (AiP) verification board is provided, which includes a carrier board configured for disposing an antenna array or an electronic circuit; and a plurality of SMPM connectors. The plurality of SMPM connectors are arranged in an array on the carrier board and electrically connected with the antenna array or the electronic circuit of the carrier board for testing the characteristics of the antenna array on the carrier board or the characteristics of the electronic circuit on the carrier board. The AiP verification board is fixed on a beamforming test platform. In addition to the aforementioned AiP verification board, an AiP verification board including a plurality of adaptor structures and an AiP verification board including a plurality of connectors and a plurality of adaptor structures are also provided.

RAPID OVER-THE-AIR PRODUCTION LINE TEST PLATFORM

Provided is a rapid over-the-air (OTA) production line test platform, including a device under test (DUT), an antenna array and two reflecting plates. The DUT has a beamforming function. The antenna array is arranged opposite to the DUT, and emits beams with beamforming. Two reflecting plates are disposed opposite to each other, and are arranged between the DUT and the antenna array. The beam OTA test of the DUT is carried out by propagation of the beams between the antenna array, the DUT and the two reflecting plates. Accordingly, the test time can be greatly shortened and the cost of test can be effectively reduced. In addition to the above-mentioned rapid OTA production line test platform, platforms for performing the OTA production line test by using horn antenna arrays together with bending waveguides and using a 3D elliptic curve are also provided. 1. A rapid over-the-air (OTA) production line test platform , comprising:an antenna array for transmitting a test beam in a plurality of transmitting directions;an electromagnetic wave guiding device for guiding the test beam;a test machine to be loaded with a device under test (DUT) for controlling the DUT to receive the guided test beam from a plurality of receiving directions; anda controller electrically connected with the test machine and the antenna array for calculating an antenna radiation pattern of the DUT based on at least one power received from the plurality of receiving directions corresponding to the DUT and a transmitting power of the antenna array.2. The rapid OTA production line test platform of claim 1 , wherein the electromagnetic wave guiding device includes:two reflecting plates disposed opposite to each other and between the DUT and the antenna array,wherein the test beam propagates between the antenna array, the DUT and the two reflecting plates to enable an OTA beam test of the DUT.3. The rapid OTA production line test platform of claim 2 , wherein the propagation includes direction ...

Wireless transceiver capable of offsetting internal signal leakage

The present invention discloses a wireless transceiver capable of offsetting internal signal leakage. The wireless transceiver includes a transmission circuit, a reception circuit and a calibration circuit. The calibration circuit generates a first estimation signal according to the difference between a test signal and a reception digital signal passing through a standard path, generates a second estimation signal according to the difference between the test signal and a reception digital signal passing through a leakage path, and then determines N coefficient(s) of a calibration filter according to the difference between the first estimation signal and the second estimation signal. Therefore, the calibration circuit including the calibration filter can output a calibration signal to the reception circuit to offset at least a part of the signal leakage from the transmission circuit to the reception circuit. 1. A wireless transceiver capable of offsetting internal signal leakage , comprising: a transmission front-end circuit including a digital-to-analog converter configured to generate a transmission analog signal according to a transmission digital signal; and', 'a transmission back-end circuit including a transmission radio frequency circuit configured to generate a radio frequency transmission signal according to the transmission analog signal;, 'a transmission circuit including a reception front-end circuit including a reception radio frequency circuit, the reception radio frequency circuit configured to generate a reception analog signal according to the radio frequency transmission signal in a first mode and a second mode and configured to generate the reception analog signal according to a reception signal and a transmission signal in an operation mode, in which the reception analog signal includes signal leakage from the transmission radio frequency circuit and the transmission signal is the radio frequency transmission signal or an amplified signal of the ...

INTERFERENCE SIGNAL RECORDING DEVICE AS WELL AS SYSTEM AND METHOD FOR LOCATING IMPAIRMENT SOURCES IN A CABLE NETWORK

The invention provides an interference signal recording device, a system and method for locating impairment sources in a cable network by means of the interference signal recording device: one interference signal recording device is installed on the headend of the cable network, another signal recording device is installed in a cable branch of the cable network via a signal coupler; both interference signal recording devices comprise samplers; each of the interference signal recording device starts to sample the interference signal at the moment when receiving a predetermined sampling timing signal from downstream signals; a computer is used for obtaining digital sample sequences of the interference signals obtained by sampling of the two interference signal recording devices via the Internet and for calculating a cross-correlation function of the two digital sample sequences; it can be determined whether an impairment source exists in a signal delivering path passing through the location of signal coupler in the downstream, in accordance with presence or absence of a cross-correlation peak caused by the impairment source in the cross-correlation function graph as a calculation result. 1. An interference signal recording device , characterized in that comprising:a radio frequency port for connecting to a cable line of a cable network;a signal receiver connected to the radio frequency port;a sampler connected to the radio frequency port;a microprocessor connected to the signal receiver and to the sampler, wherein the microprocessor is designed to associate a digital sample sequence of an interference signal obtained by sampling of the sampler with a moment when a sampling timing signal reaches the present device and are received by the signal receiver.2. An interference signal recording device , characterized in that comprising:a radio frequency port for connecting to a cable line of a cable network;a signal transmitter connected to the radio frequency port;a sampler ...

INTERMODULATION BYPRODUCT CANCELLATION IN ONE OR MORE NODES OF A DISTRIBUTED ANTENNA SYSTEM

One embodiment is directed to a distributed antenna system (DAS) comprising a plurality of nodes, including a head-end unit and a plurality of remote units that are communicatively coupled to the head-end unit. The head-end unit is configured to receive uplink received signals from remote units that wirelessly transceive signals in a coverage area. The head-end unit is configured to sum two or more of the uplink received signals to produce a summed uplink received signal. At least one of the nodes of the DAS includes a processing device configured to determine a transfer function and apply the transfer function to signals in the DAS to cancel, reduce, attenuate, or eliminate intermodulation byproducts in the summed uplink received signal. 1. A distributed antenna system (DAS) comprising: a head-end unit; and', 'a plurality of remote units that are communicatively coupled to the head-end unit;, 'a plurality of nodes, includingwherein the head-end unit is configured to receive uplink received signals from remote units that wirelessly transceive signals in a coverage area;wherein the head-end unit is configured to sum two or more of the uplink received signals to produce a summed uplink received signal; andwherein at least one of the nodes of the DAS includes a processing device configured to determine a transfer function and apply the transfer function to signals in the DAS to cancel, reduce, attenuate, or eliminate intermodulation byproducts in the summed uplink received signal.2. The DAS of claim 1 , wherein the processing device is configured to determine the transfer function by comparing a test reference signal transmitted by a remote unit to a receive feedback signal to determine inverse signal characteristics of unwanted intermodulation byproducts in the receive feedback signal.3. The DAS of claim 2 , wherein the inverse signal characteristics include a phase shift and an amplitude shift.4. The DAS of claim 1 , wherein the transfer function is determined by ...

Method and Apparatus for Integrating Active Test Capability to a Wireless Access Point or Base Station

A method and apparatus for service quality monitoring in a wireless network is provided. The network has both wired and wireless connections, and has at least one access point capable of providing wireless connectivity to client devices. Wireless connectivity is provided to client devices from the access point with at least one client-serving radio transceiver. Radio test signals are generated for network testing from a testing transceiver at the access point. 1. A method for service quality monitoring in a wireless network , the network having both wired and wireless connections , the network having at least one access point capable of providing wireless connectivity to client devices , the at least one access point having at least one client-serving access point radio transceiver capable of serving clients and at least one client transceiver positioned as a part of the at least one access point and capable of creating wireless connections to access point transceivers in the network , the method comprising:sending and receiving wireless signals from the client-serving access point radio transceiver to serve clients; andgenerating radio test signals for network testing from the at least one client transceiver; whereinthe test signals measure the service quality of the network on at least one layer of the OSI layers L1-L7; and whereinthe starting point of the test route of the test signals and ending point of the test route of the test signals are a client transceiver positioned as a part of an access point in the network.2. The method of including minimizing radio interference between signals of the client-serving access point radio transceiver and the at least one client transceiver.3. The method of where the client transceiver for both the starting point and the ending point is positioned at the same access point as the at least one client-serving access point radio transceiver.4. The method of where client transceivers for the starting point of the test route and ...

TEST CIRCUIT, TEST DEVICE AND TEST METHOD THEREOF

Provided are a test circuit, a test device and a test method thereof. The test circuit includes: a signal processing module configured to receive a pulse signal to be tested and output a processing signal under a control signal; a sampling module connected to the output terminal of signal processing module and configured to receive the processing signal and generate a sampling signal according to the processing signal. The sampling signal includes a first sampling pulse and a second sampling pulse, the first sampling pulse and the second sampling pulse have a pulse width difference, the pulse width difference is equal to the pulse width of the pulse signal.

Rapid over-the-air production line test platform

Provided is a rapid over-the-air (OTA) production line test platform, including a device under test (DUT), an antenna array and two reflecting plates. The DUT has a beamforming function. The antenna array is arranged opposite to the DUT, and emits beams with beamforming. Two reflecting plates are disposed opposite to each other, and are arranged between the DUT and the antenna array. The beam OTA test of the DUT is carried out by propagation of the beams between the antenna array, the DUT and the two reflecting plates. Accordingly, the test time can be greatly shortened and the cost of test can be effectively reduced. In addition to the above-mentioned rapid OTA production line test platform, platforms for performing the OTA production line test by using horn antenna arrays together with bending waveguides and using a 3D elliptic curve are also provided.

Management of Coexistence of Communicating Sub-Systems in Wireless Devices

A method of calibrating coexistence of several wirelessly communicating sub-systems within a wireless device wherein the wirelessly communicating sub-systems comprise several transmitters and several receivers which are interconnected through one or more interfaces, the method comprising:—activating one of the transmitters while maintaining the other transmitters off by causing said transmitter to transmit a first signal with a known set of characteristics;—measuring unwanted signal received at each receiver and originating from a coupling of said receivers with the activated transmitter;—storing coupling data derived from each of the measured unwanted signals in relation with the set of signal characteristics of the first signal and/or a set of unwanted signal characteristics, whereby forming a calibration database for adjusting operation of one or more transmitters and/or receivers to manage the coexistence of the plurality of wirelessly communicating sub-systems during normal operation of the wireless device.

SYSTEMS AND METHODS FOR CONTROLLING THE SECOND ORDER INTERCEPT POINT OF RECEIVERS

In accordance with some embodiments, methods for controlling the second order intercept point in a receiver are provided, the methods comprising: generating an amplitude modulated test tone; causing the test tone to be received by a receiver; determining a characteristic of a second order intercept point of the receiver based on the received test tone; and based on the characteristic, adjusting a parameter of the receiver. In accordance with some embodiments, systems for controlling the second order intercept point in as receiver are provided, the systems comprising: a test tone generator that generates an amplitude modulated test tone; a receiver that receives the test tone; a correlator that determines a characteristic of a second order intercept point of the receiver based on the received test tone; and digital logic that, based on the characteristic, adjusts a parameter of the receiver. 123-. (canceled)24. A method for controlling the second order intercept point in a receiver , comprising:generating an amplitude modulated test tone based at least in part on a pseudo-random noise sequence;causing the test tone to be received by a receiver;applying a first gate bias voltage to a mixer in the receiver;producing a baseband output using the mixer in the receiver in response to the test tone and the first gate bias voltage;producing a first sign bit by performing a correlation on the baseband output against the pseudo-random noise sequence;determining whether the first sign bit is equal to zero;generating a first adjustment voltage based on the determination;generating a second gate bias voltage by combining the first gate bias voltage and the first voltage adjustment;applying the second gate bias voltage to the mixer;producing a second sign bit by performing a correlation on the baseband output against the pseudo-random noise sequence when the second gate bias voltage is applied to the mixer;generating a second voltage adjustment;applying a third gate bias voltage ...

Method and apparatus for detecting and analyzing passive intermodulation interference in a communication system

A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.

Method for Transmitting a Value Measured by a Sensor, Method for Receiving the Measured Value, Sensor, Control Device

A method for transmitting a value measured by a sensor. The measured value is copied onto a data word by a function in order to be transmitted. 1. A method for transmitting a measured value by a sensor , comprising:mapping the measured value onto a data word according to a function in order to be transmitted.2. The method as claimed in claim 1 , wherein the mapping takes place in such a way that predetermined value ranges are mapped with a higher resolution.3. The method as claimed in claim 1 , wherein the function is a non-linear and/or non-symmetric and/or non-continuous function.4. A sensor configured to map a measured value onto a data word according to at least one function and to transmit the measured value.5. The sensor as claimed in claim 4 , wherein the at least one function is stored in the sensor.6. The sensor as claimed in claim 5 , wherein claim 5 , in an initialization phase claim 5 , the sensor is configured to transmit the at least one function selected for the mapping.7. The sensor as claimed in claim 4 , wherein during manufacture of the sensor the at least one function is stored in the sensor.8. The sensor as claimed in claim 4 , wherein the measured value is determined from a received data word according to another function.9. The sensor as claimed in claim 8 , wherein:in an initialization phase, the other function is received, andthe other function for determining the measured value depends on the received function.10. The sensor as claimed in claim 4 , wherein a control device is configured to carry out all steps of the method.11. The method as claimed in claim 1 , wherein a computer program is configured to carry out the method.12. The method as claimed in claim 11 , wherein the computer program is stored on a machine-readable storage medium. The present invention relates to a method for transmitting a measured value by a sensor, a corresponding method for receiving the measured value, and a sensor and a control device as claimed in the ...

Testing methods and systems for mobile communication devices

A testing method for testing mobile communication devices comprises measuring a three-dimensional antenna pattern of an active phased antenna array (AAS) of the mobile communication device, with the AAS being maintained at a specific beamforming alignment during the measurement. A predefined base fading profile is calibrated with the measured three-dimensional antenna pattern to obtain an optimized fading profile adapted to the specific beamforming alignment. A channel model for emulation of a base station is emulated on the basis of the optimized fading profile. The method further involves performing a receiver test on the mobile communication device using the emulated channel model. The testing method may in some embodiments be a radiated two-stage over-the-air (RTS-OTA) testing method.

INTEGRATED RF CIRCUIT WITH PHASE-NOISE TEST CAPABILITY TECHNICAL FIELD

An integrated circuit is described herein. According to one or more embodiments, the integrated circuit includes a local oscillator with a voltage-controlled oscillator (VCO) that generates a local oscillator signal. Further, the integrated circuit includes a frequency divider coupled to the VCO downstream thereof. The frequency divider provides a frequency-divided local oscillator signal by reducing the frequency of the local oscillator signal by a constant factor. A first test pad of the integrated circuit is configured to receive a reference oscillator signal. Further, the integrated circuit includes a first mixer that receives the reference oscillator signal and the frequency-divided local oscillator signal to down-convert the frequency-divided local oscillator signal. 1. An integrated circuit comprising:a local oscillator including a voltage-controlled oscillator (VCO) that generates a local oscillator signal;a frequency divider coupled to the VCO downstream thereof, the frequency divider providing a frequency-divided local oscillator signal by reducing the frequency of the local oscillator signal by a constant factor;a first test pad for receiving a reference oscillator signal; anda first mixer receiving the reference oscillator signal and the frequency-divided local oscillator signal to down-convert the frequency-divided local oscillator signal.2. The integrated circuit of claim 1 , further comprising:a second mixer configured to be coupled with an antenna and receiving the local oscillator signal; anda base-band signal processing chain connected to the second mixer downstream thereof.3. The integrated circuit of claim 2 , further comprising:an analog-to-digital converter coupled to the base-band signal processing chain downstream thereof.4. The integrated circuit of claim 3 , further comprising:a digital signal processor (DSP) coupled to the analog-to-digital converter downstream thereof.5. The integrated circuit of claim 1 , further comprising:a second test ...

OFFSETTING UNWANTED DOWNLINK INTERFERENCE SIGNALS IN AN UPLINK PATH IN A DISTRIBUTED ANTENNA SYSTEM (DAS)

Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS) is disclosed. In this regard, in one example, an interference signal offset circuit is provided in an RAU to offset interference products leaked from a downlink path to an uplink path. An offset signal generation circuit is configured to generate at least one uplink interference offset signal based on the interference products leaked from the downlink path. A signal summing circuit is configured to combine the at least one uplink interference offset signal with an uplink signal received on the uplink path, thus offsetting the interference products in the uplink signal. By providing the interference signal offset circuit in the RAU to offset the interference products on the uplink path, it is possible to provide more implementation flexibility for the RAU without degrading the uplink signal. 1. An interference signal offset circuit comprising: receive a downlink signal in a downlink path, the downlink signal comprising at least one unwanted downlink interference signal; and', 'generate at least one uplink interference offset signal based on the received at least one unwanted downlink interference signal;, 'at least one offset signal generation circuit configured to receive an uplink signal in an uplink path, the uplink signal comprising a wanted uplink signal and the at least one unwanted downlink interference signal leaked from the downlink path to the uplink path;', 'receive the at least one uplink interference offset signal;', 'generate an output uplink signal based on the received uplink signal; and', 'combine the received at least one uplink interference offset signal with the received uplink signal to offset the at least one unwanted downlink interference signal from the output uplink signal; and, 'a signal summing circuit configured to measure a power level of the at least one unwanted downlink interference signal;', 'receive the output uplink signal from ...

WIRELESS TRANSMISSION PERFORMANCE TEST SYSTEM AND METHOD THEREOF

A wireless transmission performance test system is provided, configured to test wireless transmission performance of a device under test (DUT) which is disposed in a testing chamber. The wireless transmission performance test system includes a directional antenna and a control device. The directional antenna is disposed inside the testing chamber and adjacent to the DUT to receive testing signal generated by the DUT after testing. The signal coupling direction of the directional antenna is directed to the DUT. The control device is configured to receive the testing signal transmitted from the directional antenna, process the testing signal, and generate testing result. A wireless transmission performance test method is also provided herein. 1. A wireless transmission performance test system , configured to test wireless transmission performance of a device under test (DUT) which is disposed in a testing chamber , comprising:a directional antenna, disposed inside the testing chamber and adjacent to the DUT to receive testing signal generated by the DUT after testing, wherein signal coupling direction of the directional antenna is directed to the DUT; anda control device, coupled to the directional antenna, and configured to receive the testing signal transmitted from the directional antenna, process the testing signal, and generate testing result,wherein material inside the testing chamber is metal.2. The wireless transmission performance test system of claim 1 , further comprising:an attenuator, coupled between the directional antenna and the control device.3. The wireless transmission performance test system of claim 2 , further comprising:a radio frequency cable, wherein the directional antenna is coupled to the attenuator through the radio frequency cable.4. The wireless transmission performance test system of claim 1 , wherein the directional antenna is a flat type antenna coupler and the directional antenna comprises a coupled substrate coupled to the control ...

DISTRIBUTED MULTI-BAND WIRELESS NETWORKING SYSTEM

Disclosed is a way to expand the range of Internet of Things devices in a home, office, or structure to the range of a local WiFi network. This is accomplished by generating a network bridge for the devices using machine-to-machine protocols to communicate using the WiFi network backhaul channel. Transmissions in machine-to-machine protocol are tunneled through WiFi communications and extracted by the closest access point. Access points include radios for both WiFi and machine-to-machine protocols. 1. A communications method comprising:establishing a small cell local area network including a first access point and a second access point that communicate wirelessly via an Internet networking protocol;connecting a first device to the first access point via a machine-to-machine protocol, wherein the machine-to-machine protocol is a different protocol than the Internet networking protocol;connecting a second device to the second access point via the machine-to-machine protocol; andtransmitting a data packet wirelessly from the first device to the second device using the small cell local area network via the first access point and the second access point as intermediaries, wherein the data packet is in the machine-to-machine protocol and tunneled in the Internet networking protocol, and wherein the first access point has a greater transmit range than the first device.2. The method of claim 1 , wherein the machine-to-machine protocol is Bluetooth claim 1 , and the Internet networking protocol is WiFi.3. The method of claim 1 , wherein the communicative coupling of a plurality of wireless access points is over a backhaul channel.4. The method of claim 1 , further comprising:communicatively coupling the first wireless devices to at least one other of the plurality of wireless devices via a machine-to-machine protocol.5. A method for networking topology comprising:establishing a small cell local area network including a first access point and a second access point that ...

NONLINEAR DISTORTION DETECTION

Nonlinear distortion of a device under test (DUT) is detected by obtaining measurements of a multi-tone input signal from a signal generator to a DUT, to obtain a measured multi-tone input signal. Measurements are also obtained of a multi-tone output signal from the DUT that is generated based on the multi-tone input signal, to obtain a measured multi-tone output signal. A correlated part of the measured multi-tone output signal that is correlated with the measured multi-tone input signal is determined insofar as the correlated part corresponds to a frequency response function of the DUT. 1. A method for detecting nonlinear distortion of a device under test (DUT) , comprising:obtaining measurements of a multi-tone input signal from a signal generator to a DUT, to obtain a measured multi-tone input signal;obtaining measurements of a multi-tone output signal from the DUT that is generated based on the multi-tone input signal, to obtain a measured multi-tone output signal; anddetermining, in the frequency domain and using a processor that executes a software program, a correlated part of the measured multi-tone output signal that is correlated with the measured multi-tone input signal and that corresponds to a frequency response function of the DUT.2. The method of claim 1 ,wherein nonlinear distortion in the measured multi-tone output signal is determined by removing the correlated part of the measured multi-tone output signal from the measured multi-tone output signal.3. The method of claim 2 , further comprising:selecting a parametric representation of a frequency response function of the DUT as a function of a priori unknown parameters;minimizing an error function versus the a priori unknown parameters for a specified frequency range to obtain an optimal parameter vector for the a priori unknown parameters, andestimating the nonlinear distortion by subtracting the frequency response function as a function of the optimal parameter vector applied to the measured ...

Systems and Methods for Performing Tester-less Radio-Frequency Testing on Wireless Communications Circuitry

Radio-frequency performance of wireless communications circuitry on an electronic device under test (DUT) may be tested without external test equipment such as signal analyzers or signal generators. A first DUT may transmit test signals to a second DUT. External attenuator circuitry interposed between the DUTs may attenuate the test signals to desired power levels. The second DUT may characterize and/or calibrate receiver performance by generating wireless performance metric data based on the attenuated test signals. A single DUT may transmit test signals to itself via corresponding transmit and receive ports coupled together through the attenuator. The DUT may generate performance metric data based on the test signals. The DUT may include feedback receiver circuitry coupled to an output of a transmitter via a feedback, path and may characterize and/or calibrate transmit performance using test signals transmitted by the transmitter and received by the feedback receiver. 1. A method of using a test system to perform radio-frequency testing on first and second electronic devices under test , the method comprising:with the first electronic device under test, transmitting radio-frequency test signals via a radio-frequency transmit port on the first electronic device under test;with the second electronic device under test, receiving the radio-frequency test signals from the first electronic device under test via a radio-frequency receive port on the second electronic device under test; andwith the second electronic device under test, generating radio-frequency performance metric data based on the received radio-frequency test signals.2. The method defined in claim 1 , further comprising:with the second electronic device under test, transmitting additional radio-frequency test signals via an additional radio-frequency transmit port on the second electronic device under test; andwith the first electronic device under test, receiving the additional radio-frequency test ...

SIGNAL GENERATING DEVICE WITH INTEGRATED FADING GENERATING UNIT AND SIGNAL GENERATING METHOD

The invention relates to a signal generating device for generating a signal including simulated channel fading characteristics. The signal generating device includes a fading simulating unit, a signal generating unit and a modulating unit. The signal generating unit generates a first number of symbols according to a number of transmitting means for a simulated transmission to a device under test. The fading simulating unit calculates from the first number of symbols a second number of faded symbols, wherein a number of signals to be output corresponds to a number of receiving means of the device under test, based on a set of filter parameters, and provides the calculated second number of faded symbols to the modulating means; and the modulating unit generates modulated signals to be output from the second number of faded symbols. 117-. (canceled)18. A signal generating device comprising:a fading simulation unit;a signal generating unit; anda modulating unit, wherein:the signal generating unit is configured to generate a first number of symbols according to transmitting means for a simulated transmission to a device under test,wherein the fading simulation unit is configured to calculate from the first number of symbols a second number of faded symbols, wherein a number of signals to be output correspond to a number of receiving means of the device under test, based on a set of filter parameters, and to provide the calculated second number of faded symbols to the modulating means, andthe modulating unit is configured to generate modulated signals to be output from the faded symbols.19. The signal generating device according to claim 18 , wherein a transmission channel is defined between each of the transmitting means of a signal source and each of the receiving means of a real system to be simulated.20. The signal generating device according to claim 19 , the fading simulation unit comprises:a transform parameter generating means configured to generate a set of ...

Method of configuring large signal model of active device

Provided is a method of configuring a large signal model of an active device. The method may include configuring a large signal model of a first active device, preparing a first measured value on a first characteristic of a second active device, the second active device being larger than the first active device, processing the large signal model of the first active device using a circuit simulator to configure a large signal model of the second active device, simulating the large signal model of the second active device to obtain a calculated value on the first characteristic, comparing the measured and calculated values on the first characteristic to each other, and establishing the large signal model of the second active device, if a difference between the measured and calculated values on the first characteristic may be smaller than a predetermined error margin. Further, if the difference between the measured and calculated values on the first characteristic may be greater than the predetermined error margin, the large signal model of the second active device may be configured by modifying parameters of passive devices.

RF FRONT-END WITH POWER SENSOR CALIBRATION

One exemplary embodiment of the present invention relates to a circuit that includes at least one RF signal path for an RF signal and at least one power sensor, which is coupled to the RF signal path and configured to generate a sensor signal representing the power of the RF signal during normal operation of the circuit. The circuit further includes a circuit node for receiving an RF test signal during calibration operation of the circuit. The circuit node is coupled to the at least one power sensor, so that the at least one power sensor receives the RF test signal additionally or alternatively to the RF signal and generates the sensor signal as representing the power of the RF test signal. 117-. (canceled)18. A circuit comprising:at least one RF signal path for an RF signal;at least one power sensor coupled to the RF signal path and configured to generate a sensor signal representing the power of the RF signal during normal operation of the circuit; anda circuit node for receiving an RF test signal during calibration operation of the circuit, the circuit node being coupled to the at least one power sensor, so that the at least one power sensor receives the RF test signal additionally or alternatively to the RF signal and generates the sensor signal as representing the power of the RF test signal.19. The circuit of claim 18 , further comprising:a memory for storing one or more calibration parameters, which are calculated based on the power indicated by the sensor signal and the power of the RF test signal.20. The circuit of claim 19 , further comprising:a controller unit coupled to the memory and configured to receive the sensor signal and, during normal operation, to correct the sensor signal based on the one or more stored calibration parameters.21. The circuit of claim 18 , further comprising:at least one directional coupler or power divider to connect the at least one power sensor with a respective signal path of the at least one RF signal path.22. The circuit ...

TEST ARRANGEMENT AND TEST METHOD

The present invention provides to a test arrangement and a test method for testing a device under test. In particular, a test arrangement is provided com-prising a device for vectorial analysis of measurement signals and at least one further device for analysing only the power of radio frequency signals related to the de-vice under test. By simultaneously operating the device for vectorial analysis and the device for analysing the power, an efficient testing can be achieved. 1. A test arrangement for testing a device under test , the test arrangement comprising:a signal analysing device for measuring modulated signals emitted by the device under test or for emitting modulated test signals to the device under test;a plurality of power analysing devices for measuring radio frequency power emitted by the device under test or for emitting a continuous wave signal to the device under test;wherein the signal analysing device and the power analysing device each are operated in a number of test sequences without removing or reconnecting the device under test; andwherein at least one test is performed with respect to modulated test signals, and at least one other test is performed considering only the power emitted by the device under test or the continuous wave signal emitted to the device under test.2. The test arrangement of claim 1 , wherein the signal analysing device and the power analysing device are operated simultaneously.3. The test arrangement of claim 1 , wherein the signal analysing device comprises at least one of:a measurement antenna for measuring the modulated signals emitted by the device under test;a measurement antenna for emitting the modulated test signals to the device under test;a signal analyser, electrically coupled to the measurement antenna, for analysing the modulated signals measured by the measurement antenna;a signal generator for generating modulated test signals to be emitted by the measurement antenna.4. The test arrangement of claim 3 , ...

ADAPTIVE SELF-INTERFERENCE CANCELLATION

Systems, circuitries, and methods are disclosed that generate an interference replica signal that estimates interference in a receive signal that is due to a transmit signal. The interference replica signal is combined with the receive signal to generate a corrected receive signal. The method includes quantizing the transmit signal to generate a quantized transmit signal; weighting the quantized transmit signal based on one or more quantization weights; filtering the weighted quantized transmit signal based on two or more filter weights to generate the interference replica signal; and determining the quantization weights and the filter weights based on the corrected receive signal. 1. An interference replica system configured to generate an interference replica signal , the interference replica system comprising:an adaptive quantizer circuitry configured to quantize the transmit signal to generate a quantized transmit signal, wherein the adaptive quantizer weights the quantized transmit signal based on one or more quantization weights;an adaptive filter configured to filter the weighted quantized transmit signal based on two or more filter weights to generate the interference replica signal;a combiner configured to combine the interference replica signal with a receive signal to generate a corrected receive signal; andan adaptation circuitry configured to determine the quantization weights and the filter weights based on the corrected receive signal.2. The interference replica system of claim 1 , wherein: a quantizer portion configured to generate the quantized transmit signal by quantizing the transmit signal into a set of amplitude segments representing the transmit signal; and', 'a weighting circuitry that weights each amplitude segment with an associated quantization weight to generate the weighted quantized transmit signal;, 'the adaptive quantizer comprisesthe adaptation circuitry comprises a plurality of quantization weight determination circuitries, wherein ...

Harmonic intermodulation test system and method

Methods and systems for harmonic intermodulation testing are presently disclosed. The test system includes a signal generator configured to generate a test signal having a first frequency. The test system also includes an antenna system configured to transmit a representation of the test signal and receive a harmonic intermodulation signal. The test system also includes a filter configured to remove signals, from a representation of the harmonic intermodulation signal, over a bandwidth that includes the first frequency. The test system also includes an analysis unit configured to measure a power level of a second frequency contained in the representation of the harmonic intermodulation signal. The analysis unit is also configured to determine a passive intermodulation magnitude at any order based on the power level of second frequency.

Non-Line-of-Sight Detection

A wireless device can perform non-line-of-sight detection. The wireless device may establish a wireless link with another wireless device using a wireless channel. The wireless device may perform one or more channel measurements for the wireless channel. The wireless device may determine whether a line-of-sight path is available for the wireless channel based at least in part on the one or more channel measurements. The wireless device may determine whether to trigger beamforming selection, antenna selection, and/or any other link maintenance operations based at least in part on the determined line-of-sight availability. 1. An apparatus , comprising a processor configured to cause a wireless device to:perform channel measurements for a wireless channel;determine whether a line-of-sight path is available for the wireless channel based at least in part on the channel measurements for the wireless channel; anddetermine whether to trigger one or more of beamforming selection or antenna selection, based at least in part on whether a line-of-sight path is available for the wireless channel.2. The apparatus of claim 1 ,wherein the channel measurements include a signal to noise ratio (SNR) for the wireless channel,wherein the processor is further configured to cause the wireless device to calculate a standard deviation of the SNR for the wireless channel,wherein determining whether a line-of-sight path is available for the wireless channel is further based at least in part on the standard deviation of the SNR for the wireless channel.3. The apparatus of claim 1 ,wherein the channel measurements include a channel impulse response (CIR) measurement for the wireless channel,wherein the processor is further configured to cause the wireless device to estimate a channel delay spread for the wireless channel based at least in part on the CIR measurement for the wireless channel,wherein determining whether a line-of-sight path is available for the wireless channel is further based ...

Massive mimo channel emulator

This invention presents a RF channel emulator for testing a large-scale Multiple-User Multiple-Input Multiple-Output (MU-MIMO) wireless communication system, including embodiments of using over-the-air channels for connecting a RF channel emulator and a large-scale MU-MIMO wireless communication system, calibration processes that maintain the over-the-air channel reciprocity, and emulation of carrier aggregation.

CIRCUIT AND METHOD FOR A CIRCUIT

A circuit comprises a transmitter to provide a transmit signal. The circuit also comprises a coupler element to receive the transmit signal at an input port, to provide a first representation of the transmit signal at an antenna port and a second representation of the transmit signal at a testing port. The circuit further comprises a monitoring receiver unit. The monitoring receiver unit is coupled to the testing port. Furthermore, the monitoring receiver unit is configured to determine a characteristic of the second representation of the transmit signal. 1. A circuit , comprising:a transmitter to provide a transmit signal;a coupler element to receive the transmit signal at an input port, to provide a first representation of the transmit signal at an antenna port and a second representation of the transmit signal at a testing port; anda monitoring receiver unit arranged to be coupled to the testing port, to determine a characteristic of the second representation of the transmit signala monitoring mixer, arranged to be coupled between the testing port and the monitoring receiver unit, to receive the second representation of the transmit signal, and to down-convert the second representation of the transmit signal; anda bypass element, arranged to be coupled between a test signal generator and the testing port and in parallel to the monitoring mixer.2. The circuit according to claim 1 , further comprising:a further coupler element to receive a further transmit signal at a further input port and to provide a first representation of the further transmit signal at a further antenna port and a second representation of the further transmit signal at a further testing port;at least a further transmitter, coupled to the further input port, to provide a further transmit signal; andwherein the monitoring receiver unit is coupled to the further testing port, to determine a characteristic of the second representation of the further transmit signal.3. The circuit according to ...

SIGNAL GENERATING METHOD AND SIGNAL GENERATING DEVICE

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regular ly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation. 1. A transmission apparatus comprising:branching circuitry which, in operation, branches encoded data blocks into first to M-th data sequences each including different data, where M is an integer 2 or greater;mapping circuitry which, in operation, modulates the first to M-th data sequences by using a determined modulation scheme, to generate first to M-th modulated symbol sequences;precoding circuity which, in operation, precodes the first to M-th modulated symbol sequences by using a determined precoding matrix, to generate first to M-th precoded modulated symbol sequences;phase change circuitry which, in operation, performs, by using a phase hopping matrix repeatedly in which a determined phase hops during a determined number of symbols, phase hopping starting with an initial value of the phase hopping matrix on at least one of the first to M-th precoded modulated symbol sequences for each encoded data block included in the at least one precoded modulated symbol sequence, to generate first to M-th phase-changed precoded modulated symbol sequences; andtransmission circuitry which, in operation, transmits first to M-th transmission symbol sequences containing the respective first to M-th modulated symbol sequences on which phase-hopping and precoding have been performed, at a same frequency range and at a same transmission time from first to M-th antennas, respectively.2. A reception apparatus comprising:reception circuitry which, in operation, receives symbol sequences including first to M-th ...

Test system

A test system for testing a device under test having at least an input port and an output port. The test system comprising a vector signal generator, a switch, a directional element, and a vector signal analyser. The vector signal generator, depending on the respective switching position of the switch, is connected with the input port of the device under test or the output port of the device under test such that, in a first switching position of the switch, the wideband modulated signal generated by the vector signal generator is forwarded to the input port and, in a second switching position of the switch, the wideband modulated signal generated by the vector signal generator is forwarded to the output port. The switch is configured to enable the vector signal analyser to perform reflection measurements and transmission measurements depending on the respective switching position of the switch.

METHOD OF TESTING BLUETOOTH LOW ENERGY DEVICES OVER-THE-AIR AND TESTING SYSTEM

A method of testing a Bluetooth low energy device over-the-air is described, wherein a Bluetooth low energy connection is established. An enable test mode command is transmitted to the device under test. The testing is started with transmitting at least one of a test transmission command and a test receiving command. Test radio frequency test physical layer packets are transmitted in a channel to be tested. A channel switching sequence takes place. At least one of a stop transmission command and a stop receiving command is transmitted once the intended testing on the channel to be tested has been completed. Further, a testing system is described. 1. A method of testing a Bluetooth low energy device over-the-air , with the following steps:establishing a Bluetooth low energy connection between a device under test and a tester;transmitting via the tester an enable test mode command to the device under test to enable a test mode on the device under test;transmitting via the device under test an acknowledgement signal indicating that the test mode is enabled on the device under test;starting the testing with transmitting via the tester at least one of a test transmission command and a test receiving command to start a transmission testing and a receiving testing, respectively;transmitting via the device under test an acknowledgement signal indicating that at least one of the transmission testing and the receiving testing is started successfully;transmitting via at least one of the tester and the device under test radio frequency test physical layer packets in a channel to be tested during a connection interval of the Bluetooth low energy connection;changing, when the duration of the connection interval is over, the channel to a next hopping channel;transmitting a continue command from the tester to the device under test when the testing in the channel to be tested is incomplete;receiving from the device under test as a response to the continue command at least one of a ...

Mirror signal iq-imbalance correction

A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal produced in the receiver from the conveyed Test Signal can be measured. In the absence of an IQ-imbalance, the Test Signal can be completely eliminated in the receiver and the corresponding measured power of the produced signal can be minimized. Accordingly, a two dimensional algorithm is described for calibrating a receiver and correcting the IQ-imbalance by adjusting the phase and gain difference between the I and Q channels in the receiver based on the measured power of the signal produced in the receiver.

PROCESSING METHOD AND ELECTRONIC APPARATUS FOR DIGITAL SIGNAL

A processing method and electronic apparatus for a digital signal are provided. The method includes: detecting the quality of a first eye in an eye diagram of the digital signal; equalizing the digital signal; detecting the quality of a second eye in the eye diagram of the equalized digital signal; determining whether the quality of the second eye superior to the quality of the first eye by a predetermined threshold; and if so, outputting the digital signal, or else again equalizing and performing subsequent steps on the auto-compensated digital signal. The above solution is capable of effectively improving the quality of eyes in the eye diagram of the digital signal. 1. A processing method for a digital signal , comprising:detecting the quality of a first eye in an eye diagram of a digital signal;equalizing the digital signal;detecting the quality of a second eye in the eye diagram of the digital signal; anddetermining whether the quality of the second eye is superior to the quality of the first eye by a predetermined threshold;if so, outputting the digital signal, or else repeating the step of equalizing the digital signal and the subsequent steps.2. The processing method according to claim 1 , wherein the step of detecting the quality of the first eye in the eye diagram comprises:performing auto-scanning on the digital signal to obtain a first eye width of the eye diagram of the digital signal; andthe step of detecting the quality of the second eye in the eye diagram of the equalized digital signal comprises:performing auto-scanning on the equalized digital signal to obtain a second eye width of the equalized digital signal; andthe step of determining whether the quality of the second eye is superior to the quality of the first eye by the predetermined threshold comprises:determining whether the second eye width is greater than the second eye width by a predetermined value.3. The processing method according to claim 1 , wherein the digital signal is equalized by ...

TEST UNIT AND TEST METHOD FOR EFFICIENT TESTING DURING LONG IDLE PERIODS

A test unit for testing a plurality of communications devices is provided. The test unit comprises a test case database, which stores a first test case (including a first test case idle time) and a second test case. The second test case is shorter than the first test case idle time. The test unit comprises a signaling unit. The test unit comprises a test case execution manager, which reads from the test case database the first and second test case and controls the signaling unit to perform measurements according to the first test case on the first device under test until a beginning of the first test case idle time, and controls the signaling unit to perform measurements according to the second test case on the second device under test during the first test case idle time. 1. A test unit for testing at least a first communication device and a second communication device , comprising:a test case database, configured to store at least a first test case, comprising a first test case idle time, and a second test case, wherein the duration of the second test case is shorter than the first test case idle time,a signaling unit, connected to at least the first device under test and the second device under test.2. The test unit according to claim 1 , further comprising:a test case execution manager configured to read, from the test case database, at least the first test case and the second test case, to control the signaling unit to perform measurements according to the first test case on the first device under test, until a beginning of the first test case idle time, and to control the signaling unit to perform measurements according to the second test case on the second device under test during the first test case idle time.3. The test unit according to claim 2 , wherein:the test unit is configured for testing a third device under test;the test case database is configured to store a third test case;the duration of the second test case in addition to the third test case is ...

Near-field testing apparatus for testing antenna array and related method

A near-field testing apparatus for testing a device under test having an array of transmitter antennas is provided. The near-field testing apparatus includes a frame structure and a receiver circuit. The frame structure defines an array of grid sections, and is arranged for receiving the array of transmitter antennas at a first side of the array of grid sections. A periphery of each grid section at the first side surrounds a plurality of transmitter antennas in the array of transmitter antennas. The grid section is arranged to guide respective electromagnetic signals emitted by the transmitter antennas from the first side to a second side of the array of grid sections. The receiver circuit, disposed at the second side of the array of grid sections, is arranged to couple the electromagnetic signals out of the grid section.

Systems and methods for beamforming measurements

Systems and methods are disclosed herein to provide communication test systems for the testing of multiple-input multiple-output (MIMO) radio frequency wireless data communication devices, systems and networks, including Multi-User MIMO (MU-MIMO) devices and systems. In accordance with one or more embodiments, a test system containing an integrated MIMO signal analyzer is disclosed that includes a protocol engine operative in conjunction with a waveform generator and waveform analyzer that analyzes the signal waveform of a device under test. Such a test system may offer improved capabilities such as a simpler and more flexible measurement of complex MIMO signal waveforms, more automated measurements of MIMO waveforms including beamforming functions, and more accurate measurement of the efficiency of MIMO related functions such as channel estimation, transmit precoding and beamforming.

NETWORK DEVICE FOR USE IN A WIRELESS COMMUNICATION NETWORK AND AN END-TO-END OVER-THE-AIR TEST AND MEASURMENT SYSTEM FOR ONE OR MORE NETWORK DEVICES

Among network devices for use within a wireless communication network, a transmitting network device is configured to transmit to a receiving network device via a control channel one or more control signals for configuring the receiving network device for a characterization of at least one of the transmitting network device and the receiving network device and/or for a characterization of one or more communication channels between the transmitting network device and the receiving network device. 1. A network device for use within a wireless communication network ,wherein the network device is configured to transmit to another network device via a control channel one or more control signals for configuring the another network device for a characterization of at least one of the network device and the another network device and/or for a characterization of one or more communication channels between the network device and the another network device.21. The network device of , wherein the network device is configured to control an operation and/or a configuration of the another network device by means of the one or more control signals transmitted to the another network device via the control channel.3. The network device of claim 1 , wherein the network device is configured to instruct the another network device claim 1 , by means of the one or more control signals transmitted via the control channel claim 1 , to operate in a predetermined mode and/or to perform a predetermined action and/or to perform a predetermined test procedure and/or to perform a predetermined measurement procedure for the characterization of at least one of the network device and the another network device and/or of the one or more communication channels between the network device and the another network device.4. The network device of claim 1 , wherein the network device is configured to transmit the one or more control signals to a plurality of another network devices via an individual control ...

SYSTEM AND METHOD FOR CONFIRMING RADIO FREQUENCY (RF) SIGNAL CONNECTION INTEGRITY WITH MULTIPLE DEVICES UNDER TEST (DUTs) TO BE TESTED CONCURRENTLY

System and method for confirming radio frequency (RF) signal connections with multiple devices under test (DUTs) tested concurrently using replicas of a RF test signal. Cabled signal connections between the signal source and the DUTs are monitored by sensing levels of outgoing and related reflection RF signals. These signal levels are compared against similar signal levels when the outgoing RF signals are provided to reference impedances. Alternatively, the cabled signal connections have lengths of known signal wavelengths and the RF test signal frequency is swept such that minimum and maximum time delays between the outgoing and reflection RF signals go through minimum and maximum signal cycles with a difference of at least one full cycle. The reflection RF signal magnitude and phase are monitored, from which peak and valley signal level differences and phase changes are identified to determine return loss and phase changes indicative of DUT connection.

Antenna system calibration

A method for calibrating an antenna system having electronics and two or more passive antennas for connection to the electronics and two or more signal interfaces for use with a pilot signal. The method includes compensating for three major errors in order to find calibration offsets in a deterministic process. These errors are caused by differences between antenna interfaces, differences between signal interfaces and frequency margin, i.e., frequency offset, between main signal and accessory (pilot) signal. In the method, a calibration offset is initially determined that accounts for the errors caused by antenna and signal interfaces. Further refinement is performed by accounting for errors caused by the frequency margin between the main and accessory signals.

Closed-loop automatic channel selection

A system and method for improving radio performance through automatic channel selection utilizing a closed-channel model is disclosed. A measurement engine records maximum user throughput on a per station basis during normal traffic operation. The measurement engine further records throughput metrics based on test traffic sent to all associated stations during idle operation. A policy logic engine utilizes the measurements to determine an optimal transmission channel for transmission and receipt of data.

IMAGING SYSTEM

An imaging system includes an indicator installed around an antenna, wherein optical characteristics of the indicator change as a function of an electromagnetic field formed by the antenna, an imaging apparatus for imaging a change in optical characteristics of the indicator, a transmitter for radiating radio waves toward the antenna, and a receiver for receiving a signal from the antenna. 1. An imaging system comprising:an indicator installed around an antenna, wherein optical characteristics of the indicator change as a function of an electromagnetic field formed by the antenna;an imaging apparatus for imaging a change in optical characteristics of the indicator;a transmitter for radiating radio waves toward the antenna; anda receiver for receiving a signal from the antenna.2. The imaging system according to claim 1 , wherein the indicator comprises:a loss film which is partially heated by the electromagnetic field formed by the antenna; anda photoelastic plate, wherein optical characteristics of a part of the photoelastic plate change by the partial heating of the loss film.32. The imaging system according to claim 1 , wherein the photoelastic plate is partially heated by the partial heating of the loss film claim 1 , and optical characteristics of the partially heated part of the photoelastic plate change according to a photoelastic effect.4. The imaging system according to claim 3 , wherein double refraction occurs in the part of the photoelastic plate where the optical characteristics of the photoelastic plate change.5. The imaging system according to claim 1 , wherein the imaging apparatus comprises:a light source for generating light;a linear polarizer for linearly polarizing the light generated by the light source;a circular polarizer for circularly polarizing the linearly polarized light;a beam splitter for causing the circularly polarized light to be incident to the indicator;an analyzer for linearly polarizing light passed through the indicator; anda ...

TEST INSTRUMENT FOR TESTING DEVICES INTERNALLY PERFORMING SIGNAL CONVERSIONS

A test instrument measures performance of a transponder without direct access to a line interface of the transponder. The test instrument learns parameters of internal signal conversion processes of the transponder and measures performance of the transponder based on the learned parameters. 1. A test instrument connectable to a device under test (DUT) for causing the DUT to transmit a predetermined modulation test pattern signal , the test instrument comprising:a test instrument host interface to couple to a data interface of the DUT;a test pattern generator to generate transmit non-return-to-zero (NRZ) signals and to communicate the transmit NRZ signals to the DUT via the test instrument host interface, and to receive return NRZ signals from the DUT via the host interface,wherein the DUT is to receive the transmit NRZ signals, and convert the transmit NRZ signals to modulation signals for transmission via a line interface of the DUT, and the DUT is to receive, via the line interface, signals responsive to the transmitted modulation signals and convert the received signals to the return NRZ signals; and receive the return NRZ signals from the DUT via the test instrument host interface, and', 'determine, based on the transmit NRZ signals and the return NRZ signals, signal parameters of conversion processes performed internal to the DUT to convert the transmit NRZ signals to the modulation signals and to convert the received signals to the return NRZ signals,, 'a test pattern analyzer to'}wherein the test pattern generator is to generate, based on the determined signal parameters, a modified test pattern signal to be communicated to the DUT to cause the DUT to transmit the predetermined modulation test pattern via the line interface of the DUT.2. The test instrument of claim 1 ,wherein the DUT is caused to transmit the predetermined modulation test pattern via the line interface after the DUT performs the internal conversion processes converting the modified test ...

METHOD FOR DETERMINING A PRE-EQUALIZATION MATRIX AND TEST SETUP

A method for determining a pre-equalization matrix to be used for testing is provided. A radio communication tester is provided that has a base station emulator and a channel emulator. A device under test is provided that has at least two branches. A N×M multiple-input multiple-output (MIMO) connection is established between the radio communication tester and the device under test. The N×M MIMO connection includes at least two channels. Reference signal received power per branch measurement values are continuously forwarded from the device under test to the radio communication tester. A pre-equalization matrix is determined by the radio communication tester, wherein the reference signal received power per branch measurement values and presence of additive white Gaussian noise (AWGN) are taken into account when calculating the pre-equalization matrix. The pre-equalization matrix compensates cross-talk between the at least two channels and balances the branches such that the device under test receives equal power at its reception antennas. Further, a test setup is described.

Spectral Stitching Method to Increase Instantaneous Bandwidth in Vector Signal Analyzers

Various embodiments are described of devices and associated methods for processing a signal using a plurality of vector signal analyzers (VSAs). An input signal may be split and provided to a plurality of VSAs, each of which may process a respective frequency band of the signal, where the respective frequency bands have regions of overlap. Each VSA may adjust the gain and phase of its respective signal such that continuity of phase and magnitude is preserved through the regions of overlap. The correction of gain and phase may be accomplished by a complex multiply with a complex calibration constant. A complex calibration constant may be determined for each VSA by comparing the gain and phase of one or more calibration tones generated with each region of overlap, as measured by each of the VSAs. 1. An apparatus for processing a signal , the apparatus comprising: receive a first component signal comprising a first frequency band of an input signal; and', 'digitize the first component signal;, 'a first signal processing pathway configured to receive a second component signal comprising a second frequency band of the input signal, the second frequency band having a region of overlap with the first frequency band; and', 'digitize the second component signal;', 'wherein, when the second signal processing pathway is in a calibration mode, the second signal processing pathway is further configured to compute a calibration constant useable to correct phase mismatch between the first signal processing pathway and the second signal processing pathway, wherein the calibration constant is computed based on a phase difference between an output of the first signal processing pathway at a particular frequency and an output of the second signal processing pathway at the particular frequency, wherein the particular frequency is included within the region of overlap between the first frequency band and the second frequency band; and, 'a second signal processing pathway, phase-locked ...

METHOD AND SYSTEM FOR EMULATING AN ELECTROMAGNETIC ENVIRONMENT IN AN ANECHOIC CHAMBER

A method for emulating an electromagnetic environment, EME, in an anechoic chamber comprises the steps of: receiving, by a first receiving unit, an input signal outside the anechoic chamber; generating, by a signal generating unit, an emulated signal based on the input signal; transmitting, by a transmitting unit, the emulated signal inside the anechoic chamber to emulate the EME; receiving, by a second receiving unit, the emulated signal inside the anechoic chamber; and adjusting, by the signal generating unit, the emulated signal generated by the signal generating unit based on the emulated signal received by the second receiving unit. 1. A method for emulating an electromagnetic environment , EME , in an anechoic chamber , the method comprising the steps of:receiving, by a first receiving unit, an input signal outside the anechoic chamber;generating, by a signal generating unit, an emulated signal based on the input signal;transmitting, by a transmitting unit, the emulated signal inside the anechoic chamber to emulate the EME; and{'b': '206', 'adjusting, by the signal generating unit, the emulated signal generated by the signal generating unit based on the emulated signal () transmitted by the transmitting unit.'}2. The method according to claim 1 , further comprising the steps of receiving claim 1 , by a second receiving unit claim 1 , the emulated signal inside the anechoic chamber; and adjusting claim 1 , by the signal generating unit claim 1 , the emulated signal generated by the signal generating unit based on the emulated signal received by the second receiving unit.3. The method according to claim 2 , further comprising the steps of analyzing claim 2 , by a spectrum analyzer claim 2 , the emulated signal received by the second receiving unit to obtain an analyzing result claim 2 , and adjusting claim 2 , by the signal generating unit claim 2 , the emulated signal generated by the signal generating unit based on the analyzing result.4. The method according ...

Method of self-adaptation of a signal quality, corresponding devices and computer program

A method self-adapts signal quality of non-audio data exchanged via an audio channel between a mobile terminal and a payment accessory. The method includes at least one iteration of the following acts: reception, by the mobile terminal, of a reference signal transmitted by the payment accessory; analysis, in the mobile terminal, of the received reference signal, the analysis delivering at least one item of information representative of the quality of the reference signal, referred to as quality information; transmission, by the mobile terminal to the payment accessory, of the quality information. In the above iteration, the roles of the mobile terminal and the payment accessory can be switched. 1. A method comprising:self-adaptation of a quality of non-audio data signal exchanged via an audio channel between a mobile terminal and an electronic payment accessory connected to said mobile terminal via an audio connector of said mobile terminal, wherein self-adaptation comprises:sending, by one of said first mobile terminal or said electronic payment accessory, of a first reference signal to the other of said first mobile terminal or said electronic payment accessory, and at least one iteration of the following acts: modification, by said mobile terminal or said electronic payment accessory, of said first reference signal in taking account of at least one piece of quality information present in said response coming from the other of said first mobile terminal or said electronic payment accessory, delivering a first modified reference signal; and', 'sending, by said mobile terminal or said electronic payment accessory, said first modified reference signal to the other of said first mobile terminal or said electronic payment accessory;, 'if, before the expiry of a predetermined duration, said mobile terminal or said electronic payment accessory receives a response coming from the other of said first mobile terminal or said electronic payment accessorywhen there is no ...

IQ MISMATCH COMPENSATION METHOD AND APPARATUS, COMPENSATION DEVICE, COMMUNICATION DEVICE AND STORAGE MEDIUM

Disclosed are an IQ mismatch compensation method and apparatus for a radio frequency communication system, a compensation device and a communication device. The method comprises: acquiring an interaction result of test signals between a transmitting component and a receiving component; obtaining angle mismatch parameters of a pre-determined type according to the interaction result; determining a frequency domain compensator for performing mismatch compensation on the frequency-dependent angle mismatch parameters according to the following formulae: Y(w)=X(w)−jP(w)*X*(−w) and Y(−w)=X(−w)+jP(w)*X*(w); and performing frequency domain compensation on the frequency-dependent angle mismatch parameters by using the frequency domain compensator. Also disclosed is a computer storage medium. 1. An in-phase and quadrature (IQ) mismatch compensation method for a radio frequency communication system , comprising:acquiring an interaction result of test signals between a transmitting component and a receiving component;obtaining a predetermined type angle mismatch parameter according to the interaction result, wherein the predetermined type angle mismatch parameter comprises a frequency-dependent angle mismatch parameter; [{'br': None, 'i': Y', 'w', 'X', 'w', 'jP', 'w', 'X', 'w, '()=()−()**(−);'}, {'br': None, 'i': Y', 'w', 'X', 'w', 'jP', 'w', 'X', 'w, '(*−)=(−)+()**();'}], 'determining a frequency domain compensator for performing mismatch compensation on the frequency-dependent angle mismatch parameter according to following formulaewherein w is a sequence number of a subcarrier in a positive half frequency comprised in an orthogonal frequency division multiplexing (OFDM) baseband, Y(w) and Y(−w) are frequency domain signals after being performed compensation, X(−w) and X(w) are frequency domain signals before being performed compensation, P(w) is the frequency-dependent angle mismatch parameter for a subcarrier sequence number of w, X*(w) is a conjugate complex number of X(w), ...

Mobile terminal test system

In response to a command from the control PC 4, the first mobile terminal test apparatus 2 compresses data of test signals including a first test signal and a second test signal which are generated and encrypted, and adds a restoration parameter to a header of the compressed data. The second mobile terminal test apparatus 3 acquires the restoration parameter-added compressed data at the second port 3 a via the cable 5 from the first port 2 a, and restores and encrypts the data of test signals before encryption, based on the restoration parameters. Under the control of the control PC 4, the first mobile terminal test apparatus 2 outputs the data of the first test signal to the device under test W, and the second mobile terminal test apparatus 3 outputs the data of the second test signal to the device under test W.

METHODS AND APPARATUSES FOR MEASURING THE DISTANCE TO A PASSIVE INTERMODULATION SOURCE

According to methods of performing measurements to determine a distance to a passive-intermodulation (“PIM”) source, a first RF signal comprising a first frequency and a second RF signal comprising a second frequency may be applied to a device under test. A reference signal comprising a higher-order intermodulation-product of the first frequency and the second frequency may also be generated. An output signal from the device under test and the reference signal may be digitized and a calibration measurement may be applied. A phase difference between the device under test output and the reference signal may be determined. A plurality of phase differences may be determined for multiple first frequencies, and from the plurality of phase differences, a delay may be calculated, which may be multiplied by the velocity of propagation on the medium connecting the device under test to the test equipment to determine a distance to the PIM source. 1. A passive intermodulation (PIM) measurement apparatus , comprising:at least one signal generator that is configured to generate a first radiofrequency (RF) signal having a first RF frequency and a second RF signal having a second RF frequency;a test apparatus configured to hold a device under test, the device under test configured to receive the first and second RF signals from the at least one signal generator;a first analog/digital converter configured to receive a reference signal comprising the first RF signal and the second RF signal and to digitize the reference signal, resulting in a digitized reference signal;a second analog/digital converter configured to receive an output signal from the device under test and to digitize the output signal, resulting in a digitized output signal; anda processor configured to calculate a distance to a source of passive intermodulation within the device under test, wherein the processor is configured to calculate the distance based on a phase difference calculated by the processor between ...

SYSTEMS AND METHODS FOR RADIO FREQUENCY HEAD VALIDATION VIA ANTENNA COUPLING OR SIGNAL REFLECTION

An electronic device has multiple transmitters to transmit multiple signals. The electronic device also has a receiver to receive a signal. Moreover, the electronic device has a memory to store instructions and a processor to execute the instructions. The instructions cause the processor to send a test transmission signal from a transmitter of the multiple of transmitters, receive the test transmission signal at the receiver, and determine a gain of the test transmission signal. In response to determining that the gain is within a threshold range of an initial gain, the instructions cause the processor to send an indication that the receiver is operating as expected. 1. A tangible , non-transitory , machine-readable medium , comprising machine-readable instructions that , when executed by one or more processors , cause the one or more processors to:send a plurality of transmission signals from a plurality of transmitter antennas of a plurality of transmitters;receive the plurality of transmission signals at a receiver antenna of a receiver;determine a strongest coupled transmission signal of the plurality of transmission signals at the receiver antenna;determine a reference gain of the strongest coupled transmission signal at the receiver antenna and an associated transmitter of the plurality of transmitters;send a test transmission signal from an associated transmitter antenna of the associated transmitter;receive the test transmission signal at the receiver antenna;determine a gain of the test transmission signal, wherein the gain comprises a measured energy of a signal at the receiver antenna; andin response to determining that the gain is within a threshold range of the reference gain, send an indication that the receiver is operating as expected.2. The tangible claim 1 , non-transitory claim 1 , machine-readable medium of claim 1 , wherein the plurality of transmitter antennas is configured to operate using a first polarity and the receiver antenna is ...

CONFIGURATION SUB-SYSTEM FOR TELECOMMUNICATION SYSTEMS

Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device. 1. A configuration sub-system comprising:an input communicatively coupleable to a base station;a test signal generator integrated into the configuration sub-system, wherein the configuration sub-system is configured to switch between a first mode and a second mode, wherein in the first mode the configuration sub-system is configured to provide a test signal generated by the test signal generator to a downlink path, wherein in the second mode the configuration sub-system is configured to provide an RF downlink signal that is received via the input from the base station to the downlink path and deactivate the test signal generator, wherein the configuration sub-system is configured to provide the RF downlink signal to the downlink path only in the second mode; measure a test signal power of the test signal at a measurement point in the downlink path, and', 'measure a downlink signal power of the RF downlink signal at the measurement point; and, 'a power measurement device ...

Method and apparatus for testing a wireless device

A test apparatus for testing a wireless device, said test apparatus comprising a transceiver unit adapted to communicate with said device under test, DUT, via a wireless link; a processing unit adapted to control said transceiver unit and to detect a communication service used by said device under test, DUT, during communication with said transceiver unit; and an output unit adapted to output the communication service detected by said processing unit.

INTERFERENCE TEST SETUP SYSTEMS, STRUCTURES AND PROCESSES

Disclosed are methods and systems for interactive dynamic interference testing of wireless environments, which can emulate wireless traffic for multiple homes, apartments and offices. The emulated wireless environment can emulate a wide variety of 802.11 traffic, as well as other types of traffic. Some embodiments can also control any of the power level of interference, as well as the attenuation between devices, such as between access points and clients. The system and method can be used to monitor the performance of a device under test (DUT) under one or more interference conditions, and can be used to evaluate and modify the dynamic behavior of the DUT and other devices under different operating scenarios. 1. A system for testing a wireless device under test (DUT) , comprising:a test region;an interference set that is configured to provide a plurality of wireless signals with respect to the DUT;a mechanism for setting one or more operating parameters for any of the DUT and the interference set, for one or more interference test conditions;a mechanism for monitoring the dynamic behavior of the DUT with respect to the interference set under each of the interference test conditions;a mechanism for monitoring the dynamic behavior of the interference set with respect to the DUT under each of the interference test conditions; anda mechanism for modifying a dynamic operating parameter of any of the interference set and the DUT, based on the monitored dynamic behavior.2. The system of claim 1 , wherein the modified dynamic operating parameter includes a modification of packet length corresponding to any of input signals for receipt by the DUT or output signals for transmission from the DUT.3. The system of claim 2 , wherein the modification of packet length is a decrease in the packet length in response to an increased level of detected interference.4. The system of claim 2 , wherein the modification of packet length is an increase in the packet length in response to a ...

Backhaul and fronthaul communications in a wireless mesh network

Adjusting backhaul and fronthaul communication links of wireless mesh networks are described. In one aspect, characteristics of network data packets transmitted within a wireless mesh network can be identified. Based on those characteristics, fronthaul communication links and/or backhaul communication links can be adjusted.

SIGNAL SENDING METHOD FOR TERMINAL DEVICE AND TERMINAL DEVICE

The terminal device can generate a monophonic signal of a specified frequency, and can transmit the monophonic signal by using a specified receive antenna or transmit antenna of the terminal device. The terminal device has a function of transmitting the monophonic signal of the designated frequency by using any specified antenna. Therefore, a measurement system for an antenna complex number pattern of the terminal device can accurately measure a complex number pattern of each antenna of the terminal device in a manner in which the terminal device transmits the monophonic signal of the specified frequency by using each receive antenna or transmit antenna. The measurement system can further obtain an accurate measurement result when a MIMO OTA performance test is performed on the terminal device according to the complex number patterns of all the antennas of the terminal device. 17-. (canceled)8. A MIMO OTA performance test system , comprising:a base station simulator, configured to send multiple streams of downlink test signals to a channel emulator through multiple downlink ports; perform channel emulation processing on the multiple streams of received downlink test signals according to a complex number pattern of each of multiple receive antennas of a terminal device, a downlink radiation channel inverse matrix, and a specified downlink channel fading model, and', 'send the multiple streams of processed downlink test signals to the terminal device in an anechoic chamber by using multiple downlink antennas in the anechoic chamber; and, 'the channel emulator, configured to receive, by using the multiple receive antennas, the multiple streams of processed downlink test signals sent by the channel emulator, and', 'feedback an acknowledgement message to the base station simulator according to each stream of received processed downlink test signal, wherein the acknowledgement message fed back according to the stream of processed downlink test signal includes information ...

OPTIMIZING NETWORK RESOURCES IN A TELECOMMUNICATIONS SYSTEM

Certain features relate to a self-optimizing network entity configured for use with a distributed antenna system having a head end-unit configured to communicate wireless communication information to a plurality of remote units for transmission at a plurality of sites, the self-optimized network entity comprising circuitry configured to determine a network resource allocation plan for the plurality of remote units within the distributed antenna system based on an isolation level determined by at least one of the plurality of remote units based on a power level of a test signal received from at least one of the plurality of remote units. 1. A self-optimizing network entity configured for use with a distributed antenna system having a head end-unit configured to communicate wireless communication information to a plurality of remote units for transmission at a plurality of sites , the self-optimized network entity comprising: 'determine a network resource allocation plan for the plurality of remote units within the distributed antenna system based on an isolation level determined by at least one of the plurality of remote units based on a power level of a test signal received from at least one of the plurality of remote units.', 'circuitry configured to2. The self-optimizing network entity of claim 1 , wherein the circuitry is further configured to:define an isolation threshold indicating a minimum isolation level between the plurality of remote units; anddetermine whether the isolation level exceeds the isolation threshold.3. The self-optimizing network entity of claim 2 , wherein the network resource allocation plan includes a default plan when the isolation level exceeds the isolation threshold.4. The self-optimizing network entity of claim 2 , wherein the plurality of remote units are configured to receive copies of the same signal using the same network resources when the isolation level exceeds the isolation threshold.5. The self-optimizing network entity of ...

LOW-COST TEST/CALIBRATION SYSTEM AND CALIBRATED DEVICE FOR LOW-COST TEST/CALIBRATION SYSTEM

A test/calibration system includes a device under test (DUT) and a calibrated device. The calibrated device is coupled to the DUT, transmits or receives a test signal to or from the DUT in response to a control signal for a test item to test, measure or calibrate functioning or performance of an internal component of the DUT. 1. A calibrated device , transmitting or receiving a test signal to or from a device under test (DUT) in response to a test item to test , measure or calibrate functioning or performance of an internal component of the DUT , comprising: at least one of an analog signal processing circuit and a baseband signal processing circuit; and', 'a memory device, coupled to at least one of the analog signal processing circuit and the baseband signal processing circuit; and, 'a chip, comprisingat least one external component, outside of the chip, processing the received test signal and transmit the processed signal to the chip for test result generation purpose, or receiving a signal from the chip and processing the signal to generate the test signal to be transmitted to the DUT;wherein the external component and/or the chip have been calibrated.2. The calibrated device as claimed in claim 1 , further comprising:an analyzer, analyzing test data to obtain a test result regarding the test item, wherein the test data is obtained from the at least one external component, the analog signal processing circuit or the baseband signal processing circuit.3. The calibrated device as claimed in claim 1 , further comprising:a plurality of analyzers, capable of analyzing test data concurrently,wherein the test data is obtained from the at least one external component, the analog signal processing circuit or the baseband signal processing circuit.4. The calibrated device as claimed in claim 1 , further comprising:a plurality of analyzers, each for analyzing test data of one test item to obtain a test result regarding the test item,wherein the analyzers are capable of ...

Spectral Stitching Method to Increase Instantaneous Bandwidth in Vector Signal Analyzers

Various embodiments are described of devices and associated methods for processing a signal using a plurality of vector signal analyzers (VSAs). An input signal may be split and provided to a plurality of VSAs, each of which may process a respective frequency band of the signal, where the respective frequency bands have regions of overlap. Each VSA may adjust the gain and phase of its respective signal such that continuity of phase and magnitude is preserved through the regions of overlap. The correction of gain and phase may be accomplished by a complex multiply with a complex calibration constant. A complex calibration constant may be determined for each VSA by comparing the gain and phase of one or more calibration tones generated with each region of overlap, as measured by each of the VSAs.

Test system and method for testing a device under test

A test system for testing a device under test is described, which comprises an antenna array having a plurality of antenna elements and an adjustment unit having a Fresnel structure. The adjustment unit is placed between the antenna array and the device under test. Further, a method for testing a device under test is described.