ПРИЕМНИК И ПЕРЕДАТЧИК ДЛЯ ИСПОЛЬЗОВАНИЯ В СПУТНИКОВОЙ НАВИГАЦИОННОЙ СИСТЕМЕ

... 1. Приемник для использования в спутниковой навигационной системе, включающей группировку из множества спутников, каждый из которых передает сигнал, содержащий расширяющий код, при этом приемник содержит ! по меньшей мере одно устройство хранения кодов, имеющее комбинаторную логику для хранения кода с памятью, представляющего собой фиксированный набор импульсов и соответствующего расширяющему коду, включенному в сигнал, передаваемый спутником, причем упомянутая комбинаторная логика имеет функциональные возможности дешифрирования адресов для извлечения заданной части хранящегося кода с памятью, и ! коррелятор для осуществления корреляции входного сигнала и хранящегося кода с памятью, извлеченного из устройства хранения кодов. ! 2. Приемник по п.1, в котором для каждого спутника в группировке спутников хранится отличающийся код с памятью. ! 3. Приемник по п.2, в котором в упомянутом по меньшей мере в одном устройстве хранения кодов хранятся коды с памятью для множества спутников, при этом ...

ПРИЕМНИК

... 1. Приемник для приема радиочастотного сигнала, приемник содержит: ! фильтр (12), имеющий настраиваемую полосу пропускания и сконфигурированный для пропускания принятого радиочастотного сигнала в пределах полосы пропускания для генерации отфильтрованного сигнала, ! вычислитель (20), сконфигурированный для вычисления отношения сигнал/шум принятого радиочастотного сигнала на основании отфильтрованного сигнала; и ! регулятор (20), сконфигурированный для настройки полосы пропускания фильтра (12) таким образом, что вычисленное отношение сигнал/шум становится максимальным. ! 2. Приемник по п.1, в котором ! регулятор (20) непрерывно увеличивает полосу пропускания фильтра (12) до тех пор, пока вычисленное отношение сигнал/шум не уменьшится, и ! когда вычисленное отношение сигнал/шум уменьшается, регулятор (20) устанавливает полосу пропускания фильтра (12) в состояние непосредственно перед тем, как вычисленное отношение сигнал/шум начинает уменьшаться. ! 3. Приемник по п.2, в котором !радиочастотный ...

ERHÖHUNG DER LEISTUNG EINES EMPFÄNGERS UNTER DEM EINFLUSS VON INTERFERENZEN

EINRICHTUNG ZUR RICHTUNGSBESTIMMUNG

Method for acquiring azimuth information

Apparatus for receiving ranging signals

POSITION-DETECTING APPARATUS EMPLOYING A GPS ANTENNA

A vehicle tracking system

Improvements in or relating to directive electric antenna systems

... 592,490. Directive antenna. STANDARD TELEPHONES & CABLES, Ltd. Nov. 26, 1943, No. 19829. Convention date, Oct. 30, 1941. [Classes 39 (i) and 40 (v)] A directive antenna system comprises a radiating element and an envelope 5 of non- conductive material disposed in intercepting relation with respect to energy radiated by said element containing an ionisable gas, electrodes 6, 7, 8, 9, and 10 being provided which can be successively energized to set up a rotating space charge in the envelope. This will superimpose a rotating characteristic on the pattern radiated by the radiating element. The electrodes may be energized by a two-phase alternator connected to them through a network of rectifiers 14, 15, 16, and 17. In a modification the central electrode 10 can be avoided by the use of an 8-phase alternator supplying an electrode system consisting of electrode pairs AA<1>, BB<1>, &c. Each pair of electrodes may comprise interlocked combs or strips.

A data aquisition unit, system and method for geophysical data.

A data aquisition unit, system and method for geophysical data

A data aquisition unit, system and method for geophysical data.

A data acquisition unit, system and method for geophysical data.

A data aquisition unit, system and method for geophysical data.

RECONFIGURE-CASH GEOLOKATIONSSYSTEM

GPS RECEIVER

INCREASE OF THE ACHIEVEMENT OF A RECEIVER UNDER THE INFLUENCE OF INTERFERENCE

RECEIVER FOR THE DETERMINATION OF A MOBILE OBJECT ORIENTATION

PORTABLE RADIO EQUIPMENT

RADIO COMMUNICATION SYSTEM

PROCEDURE AND EQUIPMENT FOR THE POSITIONING OF CONSTRUCTION MACHINES

RF PROCEDURE AND RECEIVER OF A PORTABLE RADIO OF TERMINAL

GPS-BASED CONTROL OF THE ACHIEVEMENTS OF A LEICHTATHLETEN

Simplified receiver with rotator for performing position location

A data acquisition unit system and method for geophysical data

Multiple band wireless telephone with multiple antennas

ELECTROGRAPHIC POSITION LOCATION APPARATUS AND METHOD

An apparatus for use in an electrographic position sensing system comprises an antenna system and a signal strength detector. In one embodiment, the antenna system comprises two antennas (680, 690). The detector measures the signal strength from each antenna (680, 690). A microprocessor contains an algorithm to calculate the position of the detector near the antennas (680, 690).

NAVIGATION RECEIVER FOR PROCESSING SIGNALS FROM A SET OF ANTENNA UNITS

A navigation receiver processes signals transmitted by global navigation satellites and received by a set of antenna units. Each antenna unit is connected to a separate input port of an antenna multiplexer switch. Satellite signals received from each antenna unit are consecutively switched to the input of a common radiofrequency processing module. A common signal correlator generates a common in-phase correlation signal from the satellite signals received from all the antenna units. The common in-phase correlation signal is processed by a data processing module to demodulate information symbols from the received satellite signals. The common in-phase correlation signal is also processed by phase-lock loops and delay-lock loops to generate carrier phases and code delays from the received satellite signals. Embodiments are described in which, along with the common in-phase correlation signal, common functional blocks or hardware are used to process the satellite signals received from all ...

GNSS POSITIONING SYSTEM EMPLOYING A RECONFIGURABLE ANTENNA SUBSYSTEM

The system includes a reconfigurable GNSS antenna subsystem that dynamically reconfigures one or more antenna parameters to change one or more operating characteristics of an antenna based on environmental conditions and/or the presence of interfering signals to improve the quality of GNSS satellite signal reception. The system analyses the received signals to determine if the GNSS satellite signals are sufficiently above received noise, if interfering signals are present, and/or if multipath signals are adversely impacting position calculations. Based on the analysis, the reconfigurable antenna subsystem selectively and dynamically reconfigures one or more parameters to change one or more operating characteristics of the antenna. As the conditions change, the reconfigurable antenna subsystem may dynamically reconfigure one or more of the antenna parameters accordingly.

DETERMINING SPATIAL ORIENTATION INFORMATION OF A BODY FROM MULTIPLE ELECTROMAGNETIC SIGNALS

A method for determining a spatial orientation of a body, including receiving, by receiving equipment located with the body, at least three electromagnetic signal sets, each of the received signal sets having been transmitted by a different one of at least three separate transmitters at different locations, detecting, for each one of the received signal sets, information that partially defines a direction from the body to the transmitter from which the signal set was received, the detected information including one of two angles that fully define an arrival direction from which the body received the signal set in relation to a body frame, the detected information not including a second of the two angles, and determining the spatial orientation of the body, including yaw, pitch, and roll angles relative to a navigation frame, using the detected information for each one of the received signal sets.

POSITION/COMMUNICATION DEVICE FOR GUIDEWAY OPERATED VEHICLES

The invention provides guideway-based methods, apparatus and systems for tracking, sensing and communicating with objects, such as track and roadway vehicles, as well as waystations therefor. Such a system comprises a winding (14), a transmitter (16) and a receiver (68, 70). The winding (14) is made up of two or more phase conductors (10, 12) connected to form one or more closed current paths. The phased conductors (10, 12) are conductive elements (such as wires) shaped or configured in periodically repeating patterns, such as saw tooths, sinusoids or square waves. The transmitter (16) applies to at least one of the phased conductors a position-sensing signal which has an envelope that varies as a periodic function of a first position along (or relative to) the winding (14). The sensor (60, 62), which is disposed at a second position along the winding, detects the position-sensing signals on the winding (14) and generates a signal indicating the distance between the first and second positions ...

DEVICE, SYSTEM AND METHOD OF COLLECTING GEOPHYSICAL DATA

Carrier wave and pseudo-random code stripping circuit

The invention relates to a carrier wave and pseudo-random code stripping circuit for a satellite navigation signal receiving device, which comprises a carrier wave stripping circuit and a pseudo-random code stripping circuit, characterized in that the carrier wave stripping circuit comprises a decoding circuit; the intermediate-frequency signal I/Q (In-phase/Quadrature) circuit input from the radio frequency terminal and the signals output from a carrier wave NCO (Numerical Controlled Oscillator) enter the decoding circuit; and the decoding circuit outputs L bit I circuit mixing signals and L bit Q circuit mixing signals. After the circuit is adopted, the scheme adopts a decoder to substitute a mixing structure formed by a local carrier wave generating circuit and a fixed point multiplier, thus simplifying the structure of the circuit, optimizing the area of a chip and reducing power consumption. Because the decoder is constructed by adopting a gate circuit, the decoder can be directly ...

PROCESS Of ACQUISITION Of AZIMUTH INFORMATION

RECEIVER OF DETERMINATION Of ORIENTATION Of a MOBILE

L'invention concerne la détermination d'orientation d'un mobile à l'aide de signaux GPS. Selon l'invention, on prévoit un récepteur (16) comportant un seul ensemble de canaux de traitement numérique des signaux issus de plusieurs antennes (10, 12), ces signaux arrivant au récepteur par une liaison unique (17) qui sert également à l'alimentation en énergie des préamplificateurs d'antenne ainsi qu'au multiplexage d'au moins deux antennes. Les canaux de traitement numérique des signaux satellites utilisent les signaux des antennes pour effectuer l'asservissement d'un code pseudo-aléatoire local, mais utilisent seulement les signaux issus d'une antenne principale (10) pour effectuer l'asservissement d'une phase de porteuse locale. Le déphasage des signaux entre les antennes, qui sert à déterminer l'orientation des vecteurs reliant les antennes connaissant leurs positions relatives, est calculé à partir des valeurs numériques de corrélation qui servent classiquement dans tout récepteur GPS à ...

BUCKLE HAS LOCKING OF TIME FOR USE IN A RECEIVER OF SIGNALS GPS

GNSS RECEIVER WITH SWITCHING ADJUSTABLE LOCAL OSCILLATOR FREQUENCY

La présente invention concerne un récepteur GNSS (1) caractérisé en ce que la sortie de l'étage à fréquence intermédiaire (39) est connectée à la première voie de corrélation (51a) et à la seconde voie de corrélation (51b), et en ce que la boucle à verrouillage de phase (7) est adaptée pour générer alternativement : - un premier signal d'oscillateur local (OL1) à une première fréquence d'oscillateur local, de manière à transposer les signaux GNSS reçus dans la première bande de fréquences à la fréquence intermédiaire ; et - un second signal d'oscillateur local (OL2) à une seconde fréquence d'oscillateur local, de manière à transposer les signaux GNSS reçus dans la seconde bande de fréquences à la fréquence intermédiaire.

Technique for effective navigation based on user preferences

TRACTOR AND WORKING VEHICLE

This tractor is provided with: a driver's seat 19 on which an occupant can sit; a bonnet 5 provided in front of the driver's seat 19; and an antenna unit 32 for receiving satellite positioning information. When viewed from the front, an upper end section of an ROPS 26 and at least a portion of the antenna unit 32 overlap.

DEVICE FOR ELIMINATING LOCAL PERTURBATIONS FOR REFERENCE RECEIVER OF GNSS GROUND STATIONS

The present invention relates to a device for eliminating the perturbation signals received by a reference GNSS station. The device comprises means for receiving a signal of interest emitted by a satellite, including a main antenna with radiation pattern with substantially omnidirectional aperture. It also comprises means for receiving the perturbation signals, said means including a secondary antenna with directional radiation pattern with low elevations and means for receiving said perturbation signals isolated from the signal of interest. It also comprises means for subtracting the perturbation signals from the signal of interest, said means include a means for estimating the differential function for transfer W between the reception pathway of the signal of interest and the reception pathway of the perturbation signals, in such a way as to achieve a coherent subtraction of said signals. Application: GNSS systems with enhanced precision.

ANTENNA PATTERN DATA MINING FOR AUTOMOTIVE GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVERS

The system provides a global navigation satellite system (GNSS) receiver in a vehicle. The GNSS receiver includes a radio frequency (RF) receiving circuit configured to receive GNSS signals from a plurality of GNSS satellites orbiting Earth at respective azimuth and elevation angles, a memory device storing a predetermined antenna pattern including initial signal to noise ratio (SNR) values for each of the respective azimuth and elevation angles, and a processor. The processor is configured to calculate SNR values of the received GNSS signals, iteratively calculate an updated antenna pattern by combining the calculated SNR values with the initial SNR values, compare further SNR values of further received GNSS signals to the SNR values in the updated antenna pattern to perform at least one of the following: 1) detection and mitigation of multipath signals, 2) estimation of vehicle heading, and 3) determination of a location of the antenna within the vehicle.

Circular patch array for anti-jam GPS

The system and method of global positioning system (GPS) anti-jam (AJ) AJ antennas utilizing a circular array of patch antennas. In some cases the circular array is conformal. The elements are single patch, dual band (L1/L2) and are linearly polarized. A mode former and progressive phase tapers are used.

Directive radio system

Method and assembly for determining position

A position is determined using GNSS (Global Navigation Satellite Systems) with an antenna assembly having a number of antennas that are oriented with different direction vectors. Antenna-received signals are supplied to an evaluation assembly, which includes GNSS receivers and an evaluation device. The antenna-received signals are detected with regard to their satellite-related signal-to-noise ratio and, in relation to each satellite, the satellite-specific signal-to-noise ratio measured values that are positively distinguished in their signal-to-noise ratio from other signal-to-noise ratio measured values relating to the same satellite are selected. A satellite-related main direction vector signal is formed from each of the direction vector signals of the antennas. The main direction vector signals are compared with the orientation vector signals that characterize the position of the respective satellites in orbit; in the event of minor deviations a position indication is given.

Radio navigation aid

A navigation aid for visually indicating to an aircraft pilot or other user the distance and bearing to a destination by use of radio navigation information from two pre-located sources. The axis of a compass rose representative of the destination is preset spacially and angularly with respect to the two radio stations, each represented by an individual compass rose longitudinally movable along primary elongate arms connecting the three compass roses. Three secondary elongate arms are pivotally movable about the respective compass rose axes. By setting two of the secondary elongate arms to represent the bearing of the aircraft to each of the radio stations, distance to the destination can be read directly from the intersection of the three secondary elongate arms. The desired bearing is indicated by the angular relationship between the compass rose centered about the axis representative of the destination and the secondary elongate arm pivoted about its axis.

Rearview mirror with integrated microwave receiver

An inventive rearview mirror assembly is disclosed in which a microwave antenna is mounted so as to receive transmissions from one or more satellites through the front windshield of the vehicle. The microwave antenna may be tuned to receive satellite transmissions from a position identification system constellation of satellites, such as GPS or GLONASS. Additionally, the microwave antenna may be tuned to alternatively or additionally receive transmissions from at least one communication satellite, such as a CD radio satellite. In addition to the inventive rearview mirror assembly, an inventive electrical control system is disclosed that may be used as a navigation system, an electrochromic rearview mirror control system, a head lamp control system, a tire pressure monitoring and display system, a temperature sensing and display system, a vehicle compass system, a vehicle data recorder system, and/or a vehicle odometer verification system. In each of the above systems, new parameters are ...

Personal navigation device with improved antenna mounting configuration

A personal navigation device includes a GPS receiver for receiving GPS signals from a plurality of GPS satellites; a processing system coupled with the GPS receiver for determining a location of the personal navigation device as a function of the GPS signals; a display coupled with the processing system for displaying information related to the location of the personal navigation device; a housing on which the display is mounted and in which the GPS receiver and processing system are housed; and an antenna coupled with the GPS receiver for assisting in reception of the GPS signals. The antenna is fixedly positioned along a plane that is generally parallel with a plane passing through the housing.

Electrographic position location apparatus and method

An apparatus for use in an electrographic position sensing system comprises an antenna system and a signal strength detector. In one embodiment, the antenna system comprises two antennas. The detector measures the signal strength from each antenna. A microprocessor contains an algorithm to calculate the position of the detector near the antennas.

GPS-equipped meter

A versatile GPS-equipped meter includes a GPS antenna and a GPS processing circuit in an existing meter unit. Posture adjusting members are provided that have different shapes according to an attachment angle theta of a GPS-equipped meter to a vehicle body frame are appropriately selected so as to point a GPS antenna to the sky regardless of the attachment angle theta. In a meter case, an antenna relief part is secured. Accordingly, even if a relative positional relationship between the meter case and the GPS antenna is changed due to a change in the shape of the posture adjusting member, the meter case and the GPS antenna never interfere with each other. Thus, the GPS-equipped meter can be shared with various vehicles without increasing the meter case in size. Therefore, the versatility is improved.

SYSTEMS AND METHODS FOR PROVIDING ANTI-SPOOFING CAPABILITY TO A GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER

Apparatus and methods provide anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver. These GNSS receivers can be, for example, global positioning satellite (GPS) receivers. Via an authentication technique, signals from authentic GNSS sources are distinguished from signals from spoofers. Timing information, such as numerically-controlled oscillator (NCO) settings, used for tracking authenticated signals are then used to generate replica GNSS signals, which are then provided to the second GNSS receiver. As a result, the second GNSS receiver can provide accurate positioning system information in the presence of GNSS spoofers.

Antenna Unit for Work Vehicle and Work Vehicle

A GNSS antenna 26 and an inertial measurement unit 25 are placed at a longitudinal center of a unit base 55 mountable onto a work vehicle. A wireless communication unit 27 is placed at the longitudinal one end side of the unit base 55. A wireless communication antenna 28 of the wireless communication unit 27 is placed in a front part of the unit base 55, which is located on the front side of a vehicle body when the unit base 55 is mounted on the work vehicle. The GNSS antenna 26 is provided above the inertial measurement unit 25.

Scanning device for cathode-ray oscillographs

Systems and methods for providing anti-spoofing capability to a global navigation satellite system receiver

Apparatus and methods provide anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver. These GNSS receivers can be, for example, global positioning satellite (GPS) receivers. Via an authentication technique, signals from authentic GNSS sources are distinguished from signals from spoofers. Timing information, such as numerically-controlled oscillator (NCO) settings, used for tracking authenticated signals are then used to generate replica GNSS signals, which are then provided to the second GNSS receiver. As a result, the second GNSS receiver can provide accurate positioning system information in the presence of GNSS spoofers.

Method and system for antenna diversity with global navigation satellite systems (GNSS)

A wireless device including one or more receivers may selectively couple one or more antennas to one or more receivers based on a directionality of the antennas and an orientation of the antennas with respect to sources of the received wireless signals, which may include global navigation satellite system (GNSS) signals. The orientation may be determined utilizing orientation sensors integrated in the wireless device, and may include a MEMS sensor and/or a magnetic compass. The antennas may be selectively coupled to the receivers based on a location of the wireless sources and the orientation of the directionality with respect to sources of the received wireless signals. A received signal strength indicator (RSSI) may be measured for each configuration. The antennas may be coupled sequentially to the receivers to determine a maximum of the RSSI. The antennas may include patch antennas and/or dipole antennas.

ASSEMBLY AND METHOD FOR POSITIONING

Verzögerungsregelschleife für GPS Empfänger

FERNSEH-SET-TOP-BOX MIT GPS-EMPFÄNGER

GPS-Antennengehäuse

GPS-Antennengehäuse, mit einem schachtelartigen Gehäusekörper (10), der durch eine obere Wand (11) und vier äußere Seitenwände (12) gebildet wird, wobei der Gehäusekörper (10) einen offenen Boden (13) aufweist, einer Kammer (20) zum Aufnehmen der GPS-Antenneneinheit (30), und einer ersten Halteeinrichtung (22), die in die Kammer (20) ragt, zum Halten der GPS-Antenneneinheit (30), wobei die GPS-Antenneneinheit (30) durch den offenen Boden (13) in die Antennenaufnahmekammer (20) einführbar ist, dadurch gekennzeichnet, daß der Gehäusekörper (10) vier innere Seitenwände (21) aufweist, die sich vertikal von der Innenfläche der oberen Wand (11) zum Boden (13) hin erstrecken und die Kammer (20) bilden, und daß die erste Halteeinrichtung (22) an der Innenfläche der inneren Seitenwand (21) ausgebildet ist und sich von dort nach innen erstreckt.

Elektronisches Touristik- und Wandergerät

Method for acquiring azimuth information

Digital front end for a satellite navigation receiver

A vehicle tracking system

Aircraft instruments

... 1,131,202. Aircraft instruments. SPERRY RAND CORP. 31 Jan., 1966 [1 Feb., 1965], No. 4165/66. Heading B7W. In a head-up display in which an image of a runway is projected from a cathode-ray tube 101 into a pilot's field of vision to overlay a real runway during landing, the optical apparatus is pivotable so that the image can be projected into areas of the pilot's field of vision that cannot be covered by fixed optical apparatus. For example, at extreme angles of drift and incidence the runway image would normally be off the edge of the cathode-ray tube, and the cathode-ray tube and associated mirrors and lenses are pivoted about yaw and pitch axes to compensate for this, biasing signals corresponding to the pivoting angles being applied to the tube to maintain the runway image overlaying the real runway. This pivoting may be done manually, or by servos 36, 38 responsive to angles of incidence and drift. These biasing signals are also applied to a horizon line (63, Fig. 10, not ...

ELECTROMAGNETIC TRACKINGSYSTEM AND PROCEDURE WITH INDIVIDUAL TRANSMISSION COIL

SYSTEM AND PROCEDURE FOR THE DETERMINATION OF THE MOMENTARY SPEED OF AN OBJECT

BROADBAND FREQUENCY DISCRIMINATOR AND RADIOLOCATION RECEIVER

TELEVISION SET TOP BOX WITH GPS RECEIVER

Dual redundant GPS anti-jam air vehicle navigation system

Method and apparatus for reducing electromagnetic interference and jamming in gp equipment operating in rolling environments

METHOD AND APPARATUS FOR REDUCING ELECTROMAGNETIC INTERFERENCE AND JAMMING IN COMMUNICATIONS EQUIPMENT OPERATING IN ROLLING ENVIRONMENTS

Direction determining apparatus

REFLECTING MIRROR-EQUIPPED GPS RECEIVING ANTENNA APPARATUS

Improved system for locating a stolen vehicle

TECHNIQUE FOR EFFECTIVE NAVIGATION BASED ON USER PREFERENCES

In a navigation device in accordance with the invention, user profiles may be stored and used to navigate a user who may be driving in a vehicle, on foot, or in other mode of transportation. Each user profile corresponds to one of the user's personae. For example, the user business profile corresponding to the user's business persona may be different from the user personal profile corresponding to the user's personal persona. For instance, the user business profile may include fine dining type restaurants for business meetings while the user personal profile may instead include fast- food type restaurants for personal dining. The inventive navigation device provides the user with a navigated route, together with information concerning the favorite facilities and events surrounding the navigated route, which satisfy the preferences in a selected user profile. In accordance with an aspect of the invention, blockages may also be established using the device to avoid selected areas, e.g., high ...

SYSTEMS AND METHODS FOR UTILIZING CONNECTOR WITH AN EXTERNAL ANTENNA TO UTILIZE MULTIFREQUENCY GNSS FUNCTIONALITY OF A MOBILE DEVICE

Systems and methods are provided for utilizing a connector to connect an external antenna to a mobile device. GNSS signals, associated with at least two different frequency bands, may be received at the external antenna and the GNSS signals may be transmitted to a connector module of the connector. The connector module may convert analog GNSS signals to generate digital radio frequency (RF) signals. The connector module may encrypt the digital RF signals to generate encrypted digital RF signals. The encrypted digital RF signals may be transmitted from the connector module to the mobile device. A multifrequency GNSS functionality module of the chipset may utilize decrypted digital RF signals to obtain GNSS raw measurements. The multifrequency GNSS functionality module and/or an application executing on the mobile device may utilize the GNSS raw measurements to compute position, velocity, and/or time (PVT).

SYNTHETIC APERTURE ANTENNA DEVICE FOR TRANSMITTING SIGNALS OF A SATELLITE NAVIGATION SYSTEM COMPRISING A CARRIER AND MEANS FOR DETERMINING ITS TRAJECTORY

Synthetic aperture antenna device for transmitting signals of a system comprising a carrier and means for determining its trajectory, comprising, for each signal respectively associated with a spatial direction, processing means suitable for generating a stationary phase signal over a time window corresponding to the distance travelled by the device throughout the period of coherent integration, before modulation of the said received signal, the said processing means comprising correction means suitable for correcting the carrier phase of the said signal.

SYNTHETIC APERTURE ANTENNA DEVICE FOR RECEIVING SIGNALS OF A SYSTEM COMPRISING A CARRIER AND MEANS FOR DETERMINING ITS TRAJECTORY

Synthetic aperture antenna device for receiving signals of a system comprising a carrier and means for determining its trajectory (301), comprising, for each signal respectively associated with a spatial direction, processing means adapted for generating a signal with stationary phase over a time window corresponding to the distance traversed by the device during the duration of coherent integration, after demodulation of the said signal received, the said processing means comprising correction means (306, 307, 308, 309, 313) adapted for correcting the carrier phase of the said signal.

NAVIGATION RECEIVER FOR PROCESSING SIGNALS FROM A SET OF ANTENNA UNITS

A navigation receiver processes signals transmitted by global navigation satellites and received by a set of antenna units. Each antenna unit is connected to a separate input port of an antenna multiplexer switch. Satellite signals received from each antenna unit are consecutively switched to the input of a common radiofrequency processing module. A common signal correlator generates a common in-phase correlation signal from the satellite signals received from all the antenna units. The common in-phase correlation signal is processed by a data processing module to demodulate information symbols from the received satellite signals. The common in-phase correlation signal is also processed by phase-lock loops and delay-lock loops to generate carrier phases and code delays from the received satellite signals. Embodiments are described in which, along with the common in-phase correlation signal, common functional blocks or hardware are used to process the satellite signals received from all ...

DEVICE FOR ELIMINATING LOCAL PERTURBATIONS FOR REFERENCE RECEIVER OF GNSS GROUND STATIONS

The present invention relates to a device for eliminating the perturbation signals received by a reference GNSS station. The device has means for receiving a signal of interest that is transmitted via a satellite. It likewise has means for receiving the perturbation signals, said means including means for receiving said perturbation signals that are isolated from the signal of interest. It also has means for subtracting the perturbation signals from the signal of interest, said means including means for estimating the differential transfer function W between the reception channel for the signal of interest and the reception channel for the perturbation signals, so as to perform coherent subtraction of said signals.

A DATA ACQUISITION UNIT, SYSTEM AND METHOD FOR GEOPHYSICAL DATA

Dual redundant GPS anti-jam air navigation system

Mobile station positioning method, base station and mobile station positioning system

Apparatus with exploring beam to indicate the position of distant objects

Improvements with the testing apparatuses for radiogoniometers

RECEIVER OF DETERMINATION Of ORIENTATION Of a MOBILE

Radio navigation architecture for e.g. vehicle, has switching units to connect radiolocation receiver to controlled or secured fixed reception pattern antennas respectively in scrambled military environment or unscrambled civil environment

L'invention concerne une architecture sécurisée de radionavigation comprenant un récepteur (3) de radiolocalisation par satellites et une antenne (12) à diagramme de rayonnement commandé, caractérisée en ce qu'elle comporte une antenne (6) à diagramme de rayonnement fixe et des moyens (5) de commutation aptes à relier sélectivement le récepteur (3) à l'une ou l'autre des antennes. L'invention concerne également un véhicule comportant une telle architecture.

METHOD FOR CALIBRATING AN ONE-WAY SATELLITE NAVIGATION

L'invention propose une méthode de calibrage d'un récepteur multi-voies GNSS qui ne nécessite pas l'utilisation d'un générateur de signal spécifique et qui peut être mise en œuvre directement à partir de simples mesures réalisées sur un récepteur en fonctionnement. L'invention consiste notamment à déterminer un premier filtre d'égalisation large bande qui peut être positionné en sortie des voies de réception RF et en entrée des corrélateurs pour corriger le désappairage entre les différentes voies de réception RF. L'invention consiste également à déterminer un second filtre d'égalisation bande étroite pour corriger les erreurs de gain et phase résiduels.

AUTOMATIC TRAVEL WORK MACHINE, AUTOMATIC TRAVEL GRASS MOWER, GRASS MOWER, AND GRASS MOWER AUTOMATIC TRAVEL SYSTEM

PERSONAL NAVIGATION DEVICE WITH ORIENTATION INDICATOR

A personal navigation device and method are disclosed. The device and method make use of an integrated electronic compass to simplify data transfer to the user thereby simplifying the navigation process. In use, data provided by the electronic compass is used to orient a displayed map relative to the orientation of the personal navigation device. Alternatively, the data provided by the electronic compass is used to rotate an icon indicative of the position of the user in which the icon rotates in response to a change of orientation of the user. In a simplified device, the electronic compass data is used to indicate the direction and displacement of a series of predetermined waypoints relative to the current position of the personal navigation device.

System for checking the plausibility of satellite signals from global navigation systems

A system for receiving and processing satellite signals from satellites of global navigation systems, in particular for a vehicle, having a signal path includes a signal conditioning unit for conditioning received satellite signals, an analysis unit for analyzing the conditioned satellite signals, and a position determination unit for determining measured values utilizing the satellite signals provided by the analysis unit. The measured values include a position, a speed, and/or a satellite time. The system has two signal paths which are separate from one another and each process mutually independent satellite signals for a position.

System and method for subband beamforming using adaptive weight normalization

A beamforming system and method. The inventive beamforming system (100) is adapted for use with an array antenna (112) having a plurality of antenna elements (1-7) and includes an FFT (122) for transforming a signal received by an antenna into a plurality of frequency subbands. A plurality of adaptive processors (800) are included for performing adaptive array processing on each of the subbands and providing a plurality of adaptively processed subbands in response thereto. A normalizing processor (900) is also included for normalizing the adaptively processed subbands. In the illustrative embodiment, the signal is a GPS signal and a digital multiplier (126) for applying a weight to a respective frequency subband for each of the elements of the array. The weights are chosen to steer a beam in a direction of a desired signal. Normalization involves adjusting the amplitude of one or more of the subbands to remove any bias distortion due to the adaptive processing thereof.

Radio frequency receiving apparatus and method of mobile communication terminal

An RF (Radio Frequency) receiving apparatus and method of a mobile communication terminal are disclosed to perform a GPS signal receiving function for a position tracking service while minimizing interference from a telecommunication signal. The RF receiving apparatus includes a first RF matching unit for RF-matching the telecommunication signal without a change in power strength and a second RF matching unit for RF-matching a telecommunication signal while reducing power strength. When a position tracking service is requested, the first RF matching unit or the second RF matching unit is selected as an RF matching path of the telecommunication signal according to the power strength of the received signal. Thus, with interference or influence of the telecommunication signal minimized, a GPS signal is received and therefore a satellite search performance of the mobile communication terminal is enhanced.

Method of receiving GPS signal in a mobile terminal

A GPS signal receiving method in a mobile terminal having a first reception path and a second reception path is provided. Upon request for GPS signal reception while receiving a CDMA signal in the first reception path, the received strength of a GPS signal is measured. If the GPS signal strength is equal to or greater than a predetermined threshold, the GPS signal is received in the first reception path. If the GPS signal strength is less than the predetermined threshold, the GPS signal is received in the second reception path.

Simple device and method to return a user to a location

A location apparatus for returning to a user to a location including a system unit configured to compute a location using radio signals, a user interface unit having a display area and first and second buttons, a memory unit, and a computational unit configured to interact with the first and second buttons. The computation unit retrieves a first location from the system unit and stores the first location in the memory unit upon selection of the first button by the user. Further, the computation unit retrieves a second location from the system unit and calculates a relative three-dimensional direction from the second location to the first location upon selection of the second button by the user. The relative three-dimensional direction is graphically represented on the display area of the user interface unit.

Navigation receiver

The subject matter disclosed herein relates to a system and method for processing navigation signals received from multiple global navigation satellite systems (GNSS′). In a particular implementation, signals received from multiple GNSS′ may be processed in a single receiver channel.

Receive Diversity in GNSS Receivers

The subject matter disclosed herein relates to receiving one or more SPS signals at two or more physically separated antennae. In an aspect, signals from the physically separated antennae may be downconverted into complex digital signals that may undergo further processing to improve one or more performance metrics related to position estimation operations, for example.

GPS Baseband Architecture

A GPS baseband architecture provides flexibility and power consumption and chip area usage advantages. The GPS baseband architecture includes a first stage having a preamplifier coupled to a low noise amplifier, which is coupled to a mixer. A PLL provides the mixer with a frequency to convert a signal to a higher intermediate (IF) frequency. The output of the mixer is fed to a poly-phase filter. The output of the poly-phase filter is fed to a programmable gain amplifier (PGA), whose output is fed to an analog-to-digital converter (ADC) to produce an output GPS signal. A saturation bit of the ADC is used to control the PGA through a digital amplifier gain control (AGC) circuit.

Method and System for Integrated Glonass and GPS Processing

An integrated global navigation satellite system (GNSS) receiver may be operable to decompose GNSS IF signals associated with GPS satellites and/or GLONASS satellites into a constituent narrowband GPS data stream and/or a plurality of constituent narrowband GLONASS data streams utilizing, for example, a GPS IF tuner and/or one or more GLONASS IF tuners. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be processed at reduced sampling rates utilizing a shared sample memory in the integrated GNSS receiver. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be stored in allocated sections of the shared sample memory. The stored narrowband GLONASS data streams and/or the stored narrowband GPS data stream may be processed using a correlation such as a fast Fourier transform (FFT) correlation.

Method and system for locating interferences by frequency sub-band

Method and system for locating sources interfering on a signal received by a receiver comprising an array of antennas, comprising the following steps: a step of calculating the spatio-temporal intercorrelation matrix R xx , a step of subdividing the useful band of the said signals into sub-bands (b), for each sub-band (b), a step of calculating the spatial intercorrelation matrix R(b) associated with the sub-band (b) and of calculating at least one of its eigenvalues {λ 1 , λ 2 , . . . λ M }, a step of detecting interference with the aid of the following detection criterion: log  ( ( ∑ m = k M  λ m )  /  ( M - k + 1 ) ) - log  ( ∏ m = k M  λ m )  /  ( M - k + 1 ) > threshold , a step of determining the eigenvectors {U 1 , U 2 , . . . U N } of the spatial intercorrelation matrix R(b), a step of determining the directions of arrival of the interfering sources by searching for the vectors of relative gains belonging to the said interference sub-space or which are orthogonal to the orthogonal noise sub-space and complementary to the interference sub-space.

METHOD OF REDUCING THE GLARE OF A RECEIVER RECEIVING SIGNALS FROM EMITTERS

The present invention relates to a method of reducing the glare of at least one receiver within a positioning system, the system including a plurality of emitters, each emitter emitting signals modulated by one and the same code whose autocorrelation function exhibits a main peak and at least one white zone in which the autocorrelation function is a minimum, the signals for each emitter includes a first signal modulated by the code and a second signal out of phase with respect to the first signal, the second signal being modulated by the code which is delayed with respect to the code modulating the first signal, and a receiver, the latter being configured so as to detect signals emitted by the emitters and implementing, for the tracking of the first and second signal emitted by one of the emitters, a local signal modulated by the code. 2. The method as claimed in claim 1 , wherein the code used is a maximal length sequence code.3. The method as claimed in claim 1 , wherein claim 1 , for the emitters of the system claim 1 , the phase shift of the code modulating the first claim 1 , respectively second claim 1 , signal are chosen beforehand from one emitter to the next claim 1 , in such a way that the main correlation peak of the first signal and that of the second signal of each emitter are in a white region of the calculated correlation function for the correlation between the local signal and the signals emitted by all the other emitters of the system.4. The method as claimed in claim 3 , wherein the code phase shift between the code modulating the first signal emitted by one emitter and the code modulating the first signal emitted by another emitter is equal to the code phase shift between the code modulating the second signal emitted by said emitter and the code modulating the second signal emitted by the other emitter.5. The method as claimed in claim 1 , wherein the delay of the code modulating the second signal with respect to the code modulating the first ...

DIGITAL BEAMFORMING FOR SIMULTANEOUSLY MITIGATING WEAK AND STRONG INTERFERENCE IN A NAVIGATION SYSTEM

An adaptive cascaded electronic protection processing system for global navigation satellite system (GNSS) threat mitigation is provided. The system includes a precorrelation characterization component configured to provide at least one parameter characterizing a plurality of received signals. A correlator is configured to provide a plurality of correlation results, each representing one of the plurality of received signals. A spatial weight contribution component is configured to determine an optimal set of digital beam-forming weights via an optimization process according to the at least one parameter. A postcorrelation characterization component is configured to determine at least one constraint on the optimization process according to the plurality of correlation results. 1. An adaptive electronic protection system for a global navigation satellite system (GNSS) threat mitigation comprising:a precorrelation characterization component configured to provide at least one parameter characterizing a plurality of received signals;a correlator configured to provide a plurality of correlation results, each representing one of the plurality of received signals;a spatial weight computation component configured to determine an optimal set of digital beam-forming weights via an optimization process according to the at least one parameter; anda postcorrelation characterization component configured to determine at least one constraint on the optimization process according to the plurality of correlation results.2. The adaptive electronic protection processing system of claim 1 , wherein precorrelation characterization component provides a covariance matrix representing the plurality of received signals.3. The adaptive electronic protection processing system of claim 1 , the spatial weight computation component applying at least one constraint on the optimization process according to navigation data representing the position of at least one GNSS satellite.4. The adaptive ...

Antenna Selection for GNSS Receivers

Embodiments of the invention provide a system and method to improve the performance of a GNSS receiver using antenna switching. The system has a plurality of antennas and at least one radio frequency RF chain. There are fewer RF chain(s) than antennas. A receiver processes a plurality of signals sent by a plurality of transmitters. The system also includes antenna switches and switch controller. The method includes processing signals from a plurality of satellite vehicles SVs using an antenna selected from a plurality of antennas.

Gnss superband asic and method with simultaneous multi-frequency down conversion

A multi-frequency down converter includes first and second signal paths. A common local oscillator/synthesizer drives both of the signal paths. Exemplary applications include GNSS systems operating across superbands. The down converter is adapted for use in a GNSS receiver system.

PROCESSING SATELLITE DATA FOR SLANT TOTAL ELECTRON CONTENT MEASUREMENTS

A method, system, and apparatus provide the ability to estimate ionospheric observables using space-borne observations. Space-borne global positioning system (GPS) data of ionospheric delay are obtained from a satellite. The space-borne GPS data are combined with ground-based GPS observations. The combination is utilized in a model to estimate a global three-dimensional (3D) electron density field. 1. A method for estimating ionospheric observables using space-borne observations , comprising:obtaining space-borne global positioning system (GPS) data of ionospheric delay from a satellite;combining the space-borne GPS data with ground-based GPS observations; andutilizing the combination in a model to estimate a global three-dimensional (3D) electron density field.2. The method of claim 1 , wherein the space-borne GPS data is obtained via the Constellation Observing System for Meteorology claim 1 , Ionosphere and Climate (COSMIC).3. The method of claim 1 , wherein the utilizing comprises phase leveling the space-borne GPS data.4. The method of claim 3 , wherein the phase leveling comprises utilizing an unbiased level of a pseudorange code ionospheric observable to set a level of a carrier phase ionospheric observable.5. The method of claim 1 , wherein the utilizing comprises estimating a bias of a satellite and a receiver.6. The method of claim 5 , wherein the bias is estimated by taking cross correlations between multiple different ground based GPS measurements.7. The method of claim 5 , wherein the estimating the bias for the receiver comprises:tabulating a smallest measurement of an arc that passes through a filtered region of the ionosphere;averaging the smallest measurements over a course of a day; andsubtracting, from the average, a component for the ionosphere and plasmasphere contributions, to determine a daily bias for the receiver.8. The method of claim 7 , wherein the bias for the receiver comprises a 10-day running average of the daily biases.9. A system ...

ANTENNA DEVICE FOR POSITION DETECTION, POSITION DETECTION DEVICE EQUIPPED WITH THIS ANTENNA DEVICE, AND POSITION DETECTION METHOD

Provided is an antenna device for position detection that can determine the current position, using a GPS receiver with a simple structure, with high accuracy comparable to that of an expensive positioning device, and also provided are a position detection device provided with the antenna device and a position detection method. The current position is determined using a GPS that receives signals from satellites orbiting around the earth and determines the current position. Data communication is performed with an antenna main body including: an antenna member provided, at an end thereof, with a receiving section for receiving signals from the orbiting satellites; and a rotation mechanism for rotating the antenna member circularly in the horizontal direction at a substantially uniform speed. The current position is determined based on the signals from the orbiting satellites that have been received by the receiving section. 1. A position detection device that determines a current position using a GPS that receives a signal from a satellite orbiting around the earth to determine the current position ,wherein the position detection device is capable of data communication with an antenna main body that comprises:an antenna member provided, at an end thereof, with a receiving section for receiving the signal from the orbiting satellite; anda rotation mechanism for rotating the antenna member circularly in a horizontal direction at a substantially uniform speed, andthe position detection device receives the signal from the orbiting satellite received by the receiving section.2. The position detection device according to claim 1 , wherein the position detection device comprises:a calculation means that calculates a coordinate value of the current position based on the signal received from the orbiting satellite;a locus information storage means that stores locus information about a locus of the coordinate value of the current position that has been calculated;an ...

Strong WWAN-WLAN Intermodulation (IM) Mitigation and Avoidance Techniques

Apparatuses, methods, and computer-readable media for mitigating intermodulation (IM) distortion in wireless communications devices and systems are presented. Aspects of the present invention include several different techniques that can be used separately or in tandem. For example, a receiver mitigates IM distortion by altogether avoiding reception of satellites in a GNSS band(s) that are affected by it (e.g. “victim’ or “affected” band). A receiver may instead switch reception of satellites in a GNSS band that are affected by the IM distortion (e.g. the “victim” band) and not in a dedicated tracking mode, to another GNSS band that is not affected (e.g. “non-victim” band), while still maintaining tracking of satellites in the original victim GNSS band that are in a dedicated tracking mode. A receiver may also shift a local oscillator (LO) frequency. A receiver may also perform enhanced cross-correlation techniques, such a widening or expanding an existing Xcorr algorithm mask. 1. A method of a receiver for mitigating intermodulation (IM) distortion in a wireless communications system , comprising:identifying at least one distortion signal that interferes with a first satellite positioning system (SPS);maintaining reception of a first positioning channel within the first SPS; andswitching reception of a second positioning channel within the first SPS to reception of a third positioning channel within a second SPS.2. The method of claim 1 , wherein the first SPS is a victim SPS that is the subject of substantial interference.3. The method of claim 1 , wherein the second SPS is a non-victim SPS that is not subject to substantial interference.4. The method of claim 1 , wherein the first positioning channel with the first SPS is a satellite within the first SPS that is in a dedicated tracking mode.5. The method of claim 4 , wherein the first positioning channel that is in the dedicated tracking mode comprises an identification of a position of the satellite within the ...

Multi-beam antenna array for protecting GPS receivers from jamming and spoofing signals

Multi-beam antenna array for anti jam and anti-spoof protection of GPS satellite data using multiple directional antennas disposed in various orientations jamming or spoofing signals from any direction cannot damage all said directional antennas simultaneously. Each said directional antenna connected to filtering amplifier and to multiple GPS processors for calculating direction of signal arrival. An anti-jam/anti-spoof processor comparing directions of signals arrival with real satellites positions for arrival time from data storage filters signals from jamming or spoofing signals, which are not corresponding to the correct positions stored for each satellite at the transmit time.

INTERFERENCE WAVE SIGNAL REMOVING DEVICE, GNSS RECEPTION APPARATUS, MOBILE TERMINAL, INTERFERENCE WAVE SIGNAL REMOVING PROGRAM AND INTERFERENCE WAVE REMOVING METHOD

An interference wave signal frequency is highly accurate and the interference wave signal is surely removed. A controller of an interference wave signal remover detects the interference wave signal based on a frequency scanning result by an entire-range frequency scanner, and sets a notch filter to attenuate the interference wave signal frequency. A local scan frequency band BWfof a local frequency scanner is set by having the interference wave signal frequency as its central frequency, and local scan frequencies BINare set so that frequency bands overlap with each other between adjacent frequency BIN. The local frequency scanner frequency-scans input signals to the notch filter. The controller calculates a frequency error δf of the interference wave signal frequency from the local frequency scanner, corrects the interference wave signal frequency which is from the entire-range frequency scanner by the frequency error δf, and updates the setting of the notch filter. 1. An interference wave signal removing device for removing an interference wave signal different from a desired signal that is contained in reception signals , comprising:a notch filter adjustable of an attenuation frequency band;a frequency scanner for outputting integrated signals of the reception signals at respective frequency bins which having a predetermined frequency width and partially overlapping with each other in a scan frequency band; anda controller for detecting a frequency of the interference wave signal and setting the attenuation frequency band of the notch filter based on intensities of the integrated signals of the respective frequency bins,wherein the controller calculates an estimation of error of the interference wave signal frequency based on the intensities of the integrated signals of the respective frequency bins, corrects the detected interference wave signal frequency by the error, and sets the attenuation frequency band of the notch filter.2. The interference wave signal ...

Gnss antenna with an integrated antenna element and additional information sources

An improved GNSS antenna having an integrated antenna element in combination with a plurality of built-in sources of additional data and/or a plurality of devices for receiving additional information for exchanging the information and transmission of GNSS signals from the antenna element to a GNSS receiver over a single RF cable.

Detection of Excessively High Interference Signal Levels During Reception of Global Navigation Satellite System Signals

A high-linear amplifier receives, from an input bandpass filter, input signals including weak process signals and strong interference signals, amplifies the input signals, and transmits the amplified signals to an output bandpass filter. The high-linear amplifier includes a transistor and a feedback circuit that stabilizes the operating current of the transistor. The operating current includes the direct-current and low-frequency output signal currents of the transistor. The feedback circuit includes an interference detector that rectifies a portion of the high-frequency output signals of the transistor and extends the linear range of the high-linear amplifier. An interference indicator unit alerts an operator to the presence of excessively high levels of interference before the high-linear amplifier enters the non-linear mode. Amplified signals rejected by the output bandpass filter are reflected back to the high-linear amplifier stage. A directional coupler prevents the reflected signals from disrupting the operation of the interference detector. 1. A high-linear amplifier stage configured to receive a first plurality of signals from a first bandpass filter , amplify the first plurality of signals to generate a second plurality of signals , transmit the second plurality of signals to a second bandpass filter , and receive a third plurality of signals reflected back from the second bandpass filter , wherein the first bandpass filter has a first low cutoff frequency and a first high cutoff frequency , the second bandpass filter has a second low cutoff frequency and a second high cutoff frequency , the second low cutoff frequency is greater than the first low cutoff frequency , and the second high cutoff frequency is less than the first high cutoff frequency , the high-linear amplifier stage comprising: a transistor output terminal; and', 'a transistor control terminal;, 'a high-linear transistor comprising an operational-amplifier inverting terminal;', 'an ...

DEVICE FOR COMBINING MULTIPLE SATELLITE NAVIGATION SIGNALS, AND SIGNAL PROCESSING DEVICE COMPRISING SAME

Disclosed are a multiple satellite navigation signal combining device, and a signal processing device comprising same. The multiple satellite navigation signal combining device comprises: a plurality of reception antennas for receiving satellite navigation signals from a satellite; a time delay unit for setting one satellite navigation signal, among the satellite navigation signals received by means of the reception antennas, as a reference satellite navigation signal and time-delaying other satellite navigation signals excluding the reference satellite navigation signal; and a signal combining device for combining the reference satellite navigation signal and other satellite navigation signals that have been time-delayed and transmitting same to a global navigation satellite system receiver. 1. A multiple satellite navigation signal combining device comprising:a plurality of reception antennas configured to receive satellite navigation signals from satellites;a time delay unit configured to set one satellite navigation signal among satellite navigation signals received by the reception antennas as a reference satellite navigation signal and delay the other satellite navigation signals excluding the reference satellite navigation signal; anda signal combining unit configured to combine the reference satellite navigation signal and the other delayed satellite navigation signals and transmit the combined signal to a satellite navigation receiver.2. The multiple satellite navigation signal combining device of claim 1 , wherein the time delay unit delays the other satellite navigation signals according to a following equation claim 1 , Equation 1.{'br': None, 'i': s', 't', 'S', 't', 'k−', 'd, '′()=(+(1))\u2003\u2003Equation 1'}In Equation 1, s′(t) denotes a delayed satellite navigation signal, s(t) denotes a satellite navigation signal received by the reception antenna, k denotes a satellite navigation signal number, and d denotes a delay constant.3. The multiple ...

VEHICLE SENSOR MOUNTING STRUCTURE

Provided is a vehicle sensor mounting structure by which a GNSS antenna and at least one external sensor are mounted on a roof of a vehicle, the at least one external sensor being configured to detect an external state of the vehicle. The vehicle sensor mounting structure includes: a first wiring hole into which a sensor wiring line of the at least one external sensor is drawn to be placed under the roof, the first wiring hole being formed in the roof; and a second wiring hole into which an antenna wiring line of the GNSS antenna is drawn to be placed under the roof, the second wiring hole being formed in the roof. 1. A vehicle sensor mounting structure by which a GNSS antenna and at least one external sensor are mounted on a roof of a vehicle , the at least one external sensor being configured to detect an external state of the vehicle , the vehicle sensor mounting structure comprising:a first wiring hole into which a sensor wiring line of the at least one external sensor is drawn to be placed under the roof, the first wiring hole being formed in the roof; anda second wiring hole into which an antenna wiring line of the GNSS antenna is drawn to be placed under the roof, the second wiring hole being formed in the roof.2. The vehicle sensor mounting structure according to claim 1 , wherein the first wiring hole and the second wiring hole are formed to be distanced from each other by a hole interference reduction distance or more.3. The vehicle sensor mounting structure according to claim 1 , wherein the at least one external sensor and the GNSS antenna are placed to be distanced from each other by a sensor interference reduction distance or more.4. The vehicle sensor mounting structure according to claim 1 , wherein the sensor wiring line and the antenna wiring line are placed to be distanced from each other by a wiring-line interference reduction distance or more.5. The vehicle sensor mounting structure according to claim 1 , wherein the roof of the vehicle ...

MULTIPATH MANAGEMENT IN GLOBAL NAVIGATION SATELLITE SYSTEMS

A device for handling multipath of a G.N.S.S. signal, is configured to: determine a spatial position, a clock time and measured multipath parameters comprising a relative delay and relative amplitude; communicate to a remote server the spatial position, clock time and multipath parameters; and receive processed multipath parameters as determined by the remote server. Systems comprising a plurality of such devices and their variants are described. Further aspects are described, in particular the exclusion of one or more satellites, the use of threshold schemes, pull/push modes, configurable refresh rates, quantization of positions, activation of additional sensors, filtering options, determination of merit factors for example as a function of the number of satellites in view and/or of signal-to-noise ratio, peer-to-peer schemes, as well as graphical display, audible sound or haptic feedbacks. 3. A system comprising a plurality of devices according to .4. The system of claim 3 , wherein the remote server is configured to collect data from the plurality of devices claim 3 , said data comprising a plurality of positions claim 3 , clock times and/or multipath parameters.5. The system of claim 4 , wherein one of the plurality of devices and/or the remote server are configured to exclude one or more satellites when one or more multipath parameters are determined to be superior to a predefined value.6. The system of claim 4 , wherein the remote server is configured to push multipath parameters to at least one device according to and/or wherein at least one device according to is configured to pull multipath parameters from the remote server.7. The system of claim 1 , wherein multipath parameters are determined at a configurable refresh rate.8. The system of claim 3 , wherein one of the plurality of devices is configured to power off one or more its circuits when processed multipath parameters exceed one or more predefined values.9. The system of claim 3 , wherein one of the ...

Interference wave signal removing device, gnss reception apparatus, mobile terminal, interference wave signal removing program and interference wave removing method

An interference wave signal removing device that can surely remove an interference wave signal is provided. An interference wave signal remover includes a controller, a notch filter, an entire-range frequency scanner, and a local frequency scanner. The controller detects the interference wave signal based on a frequency scanning result by the entire-range frequency scanner, and sets the notch filter to attenuate the interference wave signal frequency. Based on input signals to the notch filter, the local frequency scanner frequency-scans in a local frequency band including an attenuation band of the notch filter. The controller detects a frequency drift of the interference wave signal frequency based on the frequency scanning result by the local frequency scanner, and updates the setting of the notch filter to attenuate the interference wave signal frequency after the frequency drift.

Methods and Systems for Detecting Potential Interference with a Tracking Device Associated with a Vehicle

An exemplary method includes a monitoring system identifying a time period during which a vehicle equipped with a tracking device travels at least a threshold distance, determining that the tracking device fails to acquire a desired signal for a predetermined amount of time during the time period, and determining, based on the determining that the tracking device fails to acquire the desired signal for the predetermined amount of time during the time period, that the tracking device is potentially being interfered with during the time period. Corresponding systems and methods are also described. 1. A method comprising:identifying, by a monitoring system, a time period during which a vehicle equipped with a tracking device travels at least a threshold distance;determining, by the monitoring system, that the tracking device fails to acquire a desired signal for a predetermined amount of time during the time period, the desired signal provided by an element external to the vehicle; anddetermining, by the monitoring system, based on the determining that the tracking device fails to acquire the desired signal for the predetermined amount of time during the time period, that the tracking device is potentially being interfered with during the time period.2. The method of claim 1 , wherein the desired signal comprises a global positioning system (“GPS”) signal.3. The method of claim 2 , further comprising:determining, by the monitoring system, that the tracking device acquires a wireless network signal during the time period;wherein the determining that the tracking device is potentially being interfered with during the time period is further based on the determining that the tracking device acquires the wireless network signal during the time period.4. The method of claim 2 , wherein the determining that the tracking device is potentially being interfered with during the time period comprises determining that the tracking device is potentially being interfered with during ...

System and Method for Detecting Spoofing of GNSS Signals

The invention pertains to a method for operating a GNSS receiver in the presence of spoofed signals, the GNSS receiver having a plurality of satellite signal receive chains with a low associated antenna envelope correlation coefficient, the method comprising: receiving signals from said plurality of satellite signal receive chains; obtaining () relative amplitude and phase values of respective signals as provided by a pair of satellite signal receive chains from among said plurality of satellite signal receive chains; clustering () said received signals on the basis of said monitored relative amplitude and phase values; and asserting () a spoofing detection state when said clustering reveals a cluster of signals exhibiting similar relative amplitude and phase values over a predetermined time frame (). The invention also pertains to a GNSS receiver. 1. A method for operating a Global Navigation Satellite Systems (GNSS) receiver in the presence of spoofed signals , the GNSS receiver having a plurality of satellite signal receive chains with a low associated antenna envelope correlation coefficient , the method comprising:receiving signals from said plurality of satellite signal receive chains;obtaining relative amplitude and phase values of respective signals as provided by a pair of satellite signal receive chains as an amplitude and phase of one receive chain relative to another from among said plurality of satellite signal receive chains;clustering said received signals on the basis of said monitored relative amplitude and phase values; andasserting a spoofing detection state in response to said clustering revealing a cluster of signals exhibiting similar relative amplitude and phase values over a predetermined time frame.2. The method according to claim 1 , further comprising providing a signal to an end user in response to said spoofing detection state being asserted.3. The method according to claim 1 , further comprising performing a position determination on ...

GPS Receiver Module

A navigation satellite receiver system is disclosed. The system includes a host receiver. The host receiver includes a user interface, a module connector, and a controller coupled to the user interface and the module connector. The system further includes a receiver module operably coupled to the receiver module. The receiver module includes an antenna configured to receive one or more satellite navigation signal. The receiver module further includes an interface receiver card operably coupled to the module antenna. The interface receiver card is configured to process the one or more navigation signals. The receiver module further includes a host connector communicatively coupled to the interface receiver card and is configured to couple to the module connector. The module includes a housing configured to receive and protect the interface receiver card, the antenna, and the host connector. 1. A navigation satellite receiver system comprising:{'claim-text': ['a user interface;', 'a module connector; and', 'a controller operatively coupled with the user interface and the module connector; and'], '#text': 'a first host receiver comprising:'}{'claim-text': ['a module antenna configured to receive one or more satellite navigation signals;', 'an interface receiver card operatively coupled to the module antenna configured to process the one or more navigation signals;', 'a host connector communicatively coupled to the interface receiver card and configured to operably couple to the module connector; and', 'a housing configured to receive and protect the interface receiver card, the module antenna, and the host connector.'], '#text': 'a first receiver module operably coupled to the first host receiver comprising:'}2. The system of claim 1 , wherein the one or more navigation signals may include at least one of M-code claim 1 , L1 C/A claim 1 , L2C claim 1 , L5 claim 1 , or L1C signals.3. The system of claim 1 , wherein the first receiver module may be decoupled from the ...

GNSS RECEIVER DYNAMIC SPUR MITIGATION TECHNIQUES

Techniques for compensating for interference in a Global Navigation Satellite System (GNSS) receiver of a mobile device are provided. An example method according to these techniques includes determining transmission band information and channel tuning information associated with an operating configuration of a Wireless Wide Area Network (WWAN) transceiver of the mobile device, identifying interference compensation data using the transmission band information and the channel tuning information for compensating for interference caused by the WWAN transceiver at the GNSS receiver, and dynamically configuring notch filters of the GNSS receiver according to the interference compensation data. 1. A method for compensating for interference in a Global Navigation Satellite System (GNSS) receiver of a mobile device , the method comprising:determining transmission band information and channel tuning information associated with an operating configuration of a Wireless Wide Area Network (WWAN) transceiver of the mobile device;identifying notch filter configuration information for compensating for WWAN interference at the GNSS receiver using the transmission band information and the channel tuning information; anddynamically configuring notch filters of the GNSS receiver according to the notch filter configuration information.2. The method of claim 1 , further comprising:receiving interference compensation data at the mobile device.3. The method of wherein identifying the notch filter configuration information using the transmission band information and the channel tuning information for compensating for the WWAN interference at the GNSS receiver further comprises identifying the notch filter configuration information based at least in part on interference compensation data comprising a notch filter configuration information table and a notch filter configuration information index table associated with a band class in which the WWAN transceiver can be configured to operate.4. ...

GPS JAMMING SIGNAL RECEIVER AND GPS JAMMING SIGNAL RECEIVING METHOD

A global positioning system (GPS) jamming signal receiver and a GPS jamming signal receiving method are provided. The GPS jamming signal receiver may include a sample data generator to generate a sample data signal with respect to a signal received through an GPS antenna; a jamming signal determiner to determine a jamming state of a GPS jamming signal using the sample data signal and a navigation processing result value of the sample data; and a transmission direction angle calculator to determine a phase difference value of the GPS jamming signal according to the determination result and to calculate a transmission direction angle of the GPS jamming signal. 1. A global positioning system (GPS) jamming signal receiver comprising:a sample data generator to generate a sample data signal with respect to a signal received through an GPS antenna;a jamming signal determiner to determine a jamming state of a GPS jamming signal using the sample data signal and a navigation processing result value of the sample data; anda transmission direction angle calculator to determine a phase difference value of the GPS jamming signal according to the determination result and to calculate a transmission direction angle of the GPS jamming signal.2. The GPS jamming signal receiver of claim 1 , wherein the sample data generator generates the sample data signal by converting the signal received through the GPS antenna into a medium frequency signal through down frequency conversion and by digitizing the medium frequency signal into the sample data signal.3. The GPS jamming signal receiver of claim 1 , wherein the GPS antenna comprises a plurality of different GPS antennas arranged at distances from a reference GPS antenna which is one of the GPS antennas.4. The GPS jamming signal receiver of claim 1 , wherein the navigation processing result value comprises a navigation message claim 1 , measured data claim 1 , and a positioning result.5. The GPS jamming signal receiver of claim 1 , ...

NAVIGATION SYSTEM INTERFERENCE LOCATOR

According to some embodiments of the present invention there is provided a method for detecting locations of navigation interfering devices. The method comprises an action of receiving multiple navigation signal parameter datasets, each from one of multiple satellite signal receivers. The method comprises an action of detecting one or more interference event data according to an interference analysis of at least some of the datasets. The method comprises an action of updating a probability value for each of multiple suspected navigation interference device locations, by a location analysis of the interference event data, where each of the probability values is indicative of a likelihood that the interference event data originates from some of the suspected navigation interference device locations. The method comprises an action of selecting a subset of the suspected navigation interference device locations according to the probability values and outputting the subset. 1. A method for detecting locations of navigation interfering devices comprising:detecting at least one interference event data according to an interference analysis of a plurality of navigation signal parameter datasets received from a plurality of satellite signal receivers;mapping calculating a plurality of suspected navigation interference device locations by a location analysis of said at least one interference event data; andplotting at least some of the plurality of suspected navigation interference device locations on a map of a geographical region; andoutputting said map.2. The method of claim 1 , wherein said mapping further comprising updating a plurality of probability values each for one of said plurality of suspected navigation interference device locations claim 1 , wherein each one of said plurality of probability values is indicative of a likelihood that said at least one interference event data originates from some of said plurality of suspected navigation interference device ...

INTERFERENCE DETECTION USING MULTIPLE AUTOMATIC GAIN CONTROLLERS

A global navigation satellite system (GNSS) receiver includes radio frequency front end and digital processing functionality. Radio frequency front end includes radio frequency input; first variable gain amplifier adjusts first gain of first frequency range of first analog GNSS signal received from radio frequency input by first amount; and second variable gain amplifier adjusts second gain of second frequency range of second analog global navigation satellite system signal received from radio frequency input by second amount. Digital processing functionality compares first amount of adjustment of first gain of first frequency range with second amount of adjustment of second gain of second frequency range; and detects first interference signal present in first frequency range or second frequency range when first amount of adjustment of the first gain of first frequency range differs from second amount of adjustment of second gain of second frequency range by more than first threshold amount. 1. A global navigation satellite system receiver comprising: at least one radio frequency input;', 'a first variable gain amplifier configured to adjust a first gain of a first frequency range of a first analog global navigation satellite system signal received from the at least one radio frequency input by a first amount; and', 'a second variable gain amplifier configured to adjust a second gain of a second frequency range of a second analog global navigation satellite system signal received from the at least one radio frequency input by a second amount; and, 'a radio frequency front end including compare the first amount of adjustment of the first gain of the first frequency range with the second amount of adjustment of the second gain of the second frequency range; and', 'detect a first interference signal present in the first frequency range or the second frequency range when the first amount of adjustment of the first gain of the first frequency range differs from the ...

AUTOMATED METHODS FOR SUPPRESSION OF SPURIOUS SIGNALS

An automated method is provided for suppressing spurious signals in a direct digital synthesized signal. To determine magnitudes of local oscillator (“LO”) feedthrough and image frequency signal components, a digitally synthesized RF signal is digitally analyzed. To reduce the magnitude of the LO feedthrough signal component for the LO feedthrough signal component, one or more first parameters of at least one digital-to-analogue converter is automatically adjusted following a first search pattern. To reduce the magnitude of image frequency signal component for the image frequency signal component, at least one second parameter of the at least one digital-to-analogue converter is automatically adjusted and at least one third parameter of a phase compensation network is automatically adjusted following a second search pattern. The automatically adjusting for the LO feedthrough signal component and for the image frequency signal component can be iterated. 1. An automated method of suppressing spurious signals in a direct digital synthesized signal , including:digitally analyzing a digitally synthesized RF signal to determine magnitudes of local oscillator (“LO”) feedthrough and image frequency signal components;for the LO feedthrough signal component, automatically adjusting one or more first parameters of at least one digital-to-analogue converter following a first search pattern to reduce the magnitude of the LO feedthrough signal component;for the image frequency signal component, automatically adjusting at least one second parameter of the at least one digital-to-analogue converter and adjusting at least one third parameter of a phase compensation network following a second search pattern to reduce the magnitude of the image frequency signal component; anditerating between the automatically adjusting for the LO feedthrough signal component and for the image frequency signal component.2. The automated method of claim 1 , further including:automatically adjusting ...

METHOD FOR CONVERTING A GNSS RECEIVING SYSTEM HAVING NO INTERFERENCE PROTECTION INTO A CRPA RECEIVING SYSTEM AND CRPA SYSTEM

A method converts a GNSS receiving system having no interference protection into an interference-suppressing CRPA receiving system. To achieve a low-effort conversion, it is proposed that an existing GNSS antenna is replaced with a CRPA antenna having a CRPA interference suppression unit and the CRPA interference suppression unit is connected to a GNSS receiver by a coaxial cable. A control unit is connected to the coaxial cable, the control unit uses the coaxial cable to conduct a bidirectional communication with the CRPA interference suppression unit. A GNSS signal is received using the CRPA antenna and has interference suppressed using the CRPA interference suppression unit, and the interference-suppressed signal is routed to the GNSS receiver by the coaxial cable. 1. A method for converting a global navigation satellite system (GNSS) receiving system having no interference protection into an interference-suppressing controlled radiation pattern antenna (CRPA) receiving system , which comprises the steps of:replacing an existing GNSS antenna with a CRPA antenna having a CRPA interference suppression unit;connecting the CRPA interference suppression unit to a GNSS receiver by an existing coaxial cable, and a controller is connected to the coaxial cable, the controller uses the coaxial cable to conduct a bidirectional communication with the CRPA interference suppression unit;receiving a GNSS signal is received using the CRPA antenna and has interference suppressed using the CRPA interference suppression unit; androuting an interference-suppressed signal to the GNSS receiver by the coaxial cable.2. The method according to claim 1 , which further comprises supplying the CRPA interference suppression unit with an operating voltage by means of the coaxial cable.3. The method according to claim 1 , wherein the controller uses the coaxial cable to load firmware onto the CRPA interference suppression unit.4. The method according to claim 1 , wherein the controller uses ...

GNSS ANTENNA, GNSS MODULE, AND VEHICLE HAVING SUCH A GNSS MODULE

The invention relates to a Global navigation satellite systems (GNSS) antenna. The invention also relates to a Global navigation satellite systems (GNSS) module comprising at least one GNSS antenna according to the invention. The invention further relates to a vehicle, such as a car, comprising at least one GNSS module to the invention. 2. GNSS antenna according to claim 1 , wherein the design of at least two radiation structures is substantially identical.3. GNSS antenna according to claim 1 , wherein at least two radiation structures together form a layout claim 1 , said layout having an n-fold rotational symmetry claim 1 , wherein n≥2.4. GNSS antenna according to claim 1 , wherein the substantially spiral-shaped design of each radiation structure has a smooth curvature.5. GNSS antenna according to claim 1 , wherein the substantially spiral-shaped section of at least one radiation structure has the shape of a polynomial spiral for which the curvature changes substantially periodically with the arc length.6. GNSS antenna according to claim 1 , wherein at least one radiation structure comprises at least one fine frequency tuning branch connected to the substantially spiral-shaped section of said radiation structure.79-. (canceled)10. GNSS antenna according to claim 1 , wherein the maximum diameter of the substantially spiral-shaped section of at least one radiation structure is situated between 8 and 9 mm.11. GNSS antenna according to claim 1 , wherein the maximum width of the feeding section of at least one radiation structure is larger than the width of the substantially spiral-shaped section of said radiation structure.12. GNSS antenna according to claim 1 , wherein the width at least a part of the feeding section of at least one radiation structure decreases in the direction of the substantially spiral-shaped section of said radiation structure.1317-. (canceled)18. GNSS antenna according to claim 1 , wherein the at least one parasitic structure comprises a ...

GNSS RECEIVER APPARATUS WITH GNSS PSEUDO RANDOM NOISE DELAYED SEQUENCE GENERATOR

A GNSS (Global Navigation Satellite System) receiver apparatus includes a bank of correlators configured to receive in-phase and quadrature versions of a received signal. A code numerical controlled oscillator is configured to determine a code frequency. A GNSS pseudo random noise sequence generator is configured to generate a pseudo random noise sequence at the code frequency set by the code numerical controlled oscillator. A GNSS pseudo random noise delayed sequence generator includes a first shift register and a second shift register. Taps of the shift registers are selectable as a punctual replica, an early replica and a delayed replica of the pseudo random noise sequence. An enable circuit is configured to generate an enable signal coupled to an enable input of the flip-flops, the enable signal operating at a selectable enable frequency. 1. A GNSS (Global Navigation Satellite System) receiver apparatus , the receiver apparatus comprising:a tracking module;a bank of correlators configured to receive in-phase and quadrature versions of a received signal;a code numerical controlled oscillator configured to determine a code frequency;a GNSS pseudo random noise sequence generator configured to generate a pseudo random noise sequence at the code frequency set by the code numerical controlled oscillator;a GNSS pseudo random noise delayed sequence generator comprising a first delay line with a first shift register and a second delay line with a second shift register, each shift register having a plurality of flip-flops arranged in series with taps at an output of each flip-flop, the pseudo random noise sequence coupled to an input of a first shift register, wherein taps of the shift registers are selectable as a punctual replica, an early replica and a delayed replica of the pseudo random noise sequence based on a selection signal issued by control logic of the receiver apparatus; andan enable circuit configured to generate an enable signal coupled to an enable input ...

GNSS RECEIVER

A GNSS receiver includes an antenna device. Whether an environment around the GNSS receiver is a multipath environment in which an occurrence of multipath is probable. The antenna device is set in a first reception mode with a first directivity in response to not determining that the environment around the GNSS receiver is the multipath environment. In contrast, the antenna device is set in a second reception mode in response to determining that the environment around the GNSS receiver is the multipath environment. The second reception mode is a mode with a second directivity having an elevation angle higher than an elevation angle of the first directivity of the first reception mode. 1. A GNSS receiver mounted on a vehicle , comprising: the first reception mode in which reception is performed with a first directivity having a first elevation angle,', 'the second reception mode in which reception is performed with a second directivity having a second elevation angle that is higher than the first elevation angle of the first directivity;, 'an antenna device including at least one antenna, the antenna device being configured to implement two reception modes of a first reception mode and a second reception mode,'}a determination unit configured to determine whether an environment around the GNSS receiver is a multipath environment in which an occurrence of multipath is probable; and set the antenna device to the first reception mode in response to the determination unit not determining that the environment around the GNSS receiver is the multipath environment, and', 'set the antenna device to the second reception mode in response to the determination unit determining that the environment around the GNSS receiver is the multipath environment,, 'a setting unit configured to'}wherein:the determination unit is further configured to determine whether an environment around the vehicle is the multipath environment based on (i) a ratio of a GNSS signal having a lower elevation ...

SYSTEMS AND METHODS FOR MONITORING BROADBAND RADIO FREQUENCY INTERFERENCE

Systems and methods for monitoring broadband radio frequency interference are provided. In certain embodiments, a method comprises calculating a smoothed carrier to noise value for a received signal on a processing unit, wherein the received signal is associated with a receiver and at least one satellite; calculating an average jammer power to noise power value for the receiver; calculating an instantaneous carrier to noise value for the received signal based on the average jammer power to noise power value and the smoothed carrier to noise value; comparing the instantaneous carrier to noise value to an exclusion threshold, and determining whether to exclude the received signal from calculations of global positioning data based on the comparison of the instantaneous carrier to noise value to the exclusion threshold; and when the received signal is excluded, monitoring the received signal for readmittance to the calculation of global positioning data. 1. A system for monitoring broadband radio frequency interference , the system comprising:at least one global navigation satellite system receiver configured to receive signals from at least one satellite and provide measurements from the at least one satellite, wherein the measurements are used to calculate global positioning data;at least one memory unit configured to store instructions and data; and measure a carrier to noise value for the at least one satellite through the at least one global navigation satellite system receiver;', 'calculate a smoothed carrier to noise value, wherein the smoothed carrier to noise value is calculated based on measurements from the at least one global navigation satellite system receiver during a first time period;', 'calculate a jammer power to noise power value;', 'calculate an average jammer power to noise power value, based on the jammer power to noise power value;', 'calculate an instantaneous carrier to noise value based on the average jammer power to noise power value and the ...

POINTING SYSTEM ALIGNMENT USING GNSS ATTITUDE DETERMINATION WITH REMOVABLE GNSS ANTENNA

An example pointing system includes a sensor that measures change in angular position, a first GNSS antenna, and a second GNSS antenna mounted to a rigid body that is removable from the pointing system after calibration of the sensor. The GNSS antennas have a fixed, known baseline. The pointing system includes at least one GNSS receiver with first and second RF inputs respectively coupled to the GNSS antennas. The at least one GNSS receiver includes respective paths to process GNSS signals received from the first and second RF inputs. The pointing system includes at least one processor, communicatively coupled to the sensor and receiver, configured to: determine initial attitude of the pointing system based on the processed GNSS signals; calibrate the sensor using the determined initial attitude; determine a pointing solution for the pointing system based on measurements from the calibrated sensor without GNSS signals from second GNSS antenna. 1. A pointing system , comprising:a sensor configured to measure a change in angular position of the pointing system;a first Global Navigation Satellite System (GNSS) antenna;a second GNSS antenna mounted to a rigid body, wherein the first GNSS antenna and the second GNSS antenna have a fixed, known baseline length, wherein the second GNSS antenna mounted to the rigid body is configured to be removable from the pointing system after calibration of the sensor;at least one GNSS receiver comprising a first radio frequency input communicatively coupled to the first GNSS antenna and a second radio frequency input communicatively coupled to the second GNSS antenna, wherein the at least one GNSS receiver further comprises a first processing path to process GNSS signals received at the first radio frequency input and a second processing path to process GNSS signals received via the second radio frequency input;at least one processor communicatively coupled to the sensor and the at least one GNSS receiver, wherein the at least one ...

Cross Correlation Detection In A Satellite Navigation Receiver

A method and a system for defecting cross correlation in a satellite navigation receiver (SNR) in real time are provided. The SNR parallelly receives navigation signals from multiple satellites via multiple input channels. The SNR extracts ephemeris data from sub-frames of navigation data of each of the navigation signals. The SNR compares the ephemeris data of each navigation signal with the ephemeris data of another navigation signal. The SNR detects cross correlation between the navigation signals when the ephemeris data comparison results in a match and discards the navigation signal with low signal strength. The SNR also retrieves a ranging code from the sub-frames of navigation data of each navigation signal. The SNR compares the ranging code with a pre-programmed satellite identity code of a corresponding satellite. The SNR detects cross correlation when the code comparison results in a mismatch and discards the navigation signal with the mismatched ranging code. 1. A system for detecting cross correlation in a satellite navigation receiver in real time , comprising:at least one processor;a navigation signal reception unit configured to receive navigation signals from a plurality of satellites, said navigation signal reception unit comprising a plurality of input channels, wherein each of said plurality of input channels is configured to receive a navigational signal from one of said plurality of satellites, and wherein each of said received navigation signals comprises sub-frames of navigation data; a data extraction module configured to extract ephemeris data from said sub-frames of said navigation data received via each of said input channels, wherein said ephemeris data extracted from said sub-frames of said navigation data received via each of said input channels is stored separately in a database;', 'a comparison module configured to compare ephemeris data extracted from said sub-frames of said navigation data received via each of said input channels ...

MULTIBEAM DIGITAL BEAM-FORMING GLOBAL NAVIGATION RECEIVERS

An apparatus for positioning comprises an antenna array and a digital beam-forming processor. The antenna array comprises a plurality of antenna elements arranged as at least one of a non-planar array, a non-contiguous distributed array or both. The antenna elements produce a plurality of element signals. The digital beam-forming processor is coupled to the antenna array, and is configured to receive the element signals, process the received element signals using a plurality of beam weighting vectors, and generate a plurality of concurrent shaped beams. A first shaped beam of the concurrent shaped beams comprises a null at a first direction to reject a first signal from a first navigation satellite. A second shaped beam of the concurrent shaped beams comprises a null at a second direction to reject a second signal from a second navigation satellite. 1. An apparatus for positioning , comprising:an antenna array comprising a plurality of antenna elements arranged as at least one of a non-planar array, a non-contiguous distributed array or both, the antenna elements producing a plurality of element signals; anda digital beam-forming processor coupled to the antenna array, the digital beam-forming processor being configured to receive the element signals, process the received element signals using a plurality of beam weighting vectors, and generate a plurality of concurrent shaped beams, wherein a first shaped beam of the concurrent shaped beams comprises a null at a first direction to reject a first signal from a first navigation satellite, and wherein a second shaped beam of the concurrent shaped beams comprises a null at a second direction to reject a second signal from a second navigation satellite.2. The apparatus of further comprising a multichannel receiver coupled to the digital beam-forming processor claim 1 , the multichannel receiver comprising correlators for performing correlation of the first shaped beam and an acquisition code associated with the first ...

WIRELESS PACKET SCHEDULING FOR SATELLITE POSITIONING SYSTEM COEXISTENCE

Techniques are disclosed for managing wireless transmission duty cycle on a mobile device to mitigate interference during reception of one or more satellite-based positioning signals and transmission of one or more wireless signals, involving (1) determining a first transmission duty cycle, the first transmission duty cycle reflecting a proportion of a time duration occupied by transmission of the one or more wireless signals and (2) delaying transmission of a first wireless packet or transmitting at least one portion of the first wireless packet via the one or more wireless signals, based on a comparison of the first transmission duty cycle and a duty cycle threshold. 1. A method for managing wireless transmission duty cycle on a mobile device to mitigate interference during reception of one or more satellite-based positioning signals and transmission of one or more wireless signals , comprising:determining a first transmission duty cycle, the first transmission duty cycle reflecting a proportion of a time duration occupied by transmission of the one or more wireless signals; anddelaying transmission of a first wireless packet or transmitting at least one portion of the first wireless packet via the one or more wireless signals, based on a comparison of the first transmission duty cycle and a duty cycle threshold.2. The method of claim 1 , wherein transmission of the first wireless packet is delayed claim 1 , in response to the first transmission duty cycle being greater than or equal to the duty cycle threshold.3. The method of claim 1 , wherein the at least one portion of the first wireless packet is transmitted claim 1 , in response to the first transmission duty cycle being less than the duty cycle threshold.4. The method of claim 3 , wherein transmitting the at least one portion of the first wireless packet comprises:transmitting the entire first wireless packet, wherein transmitting the entire first wireless packet allows a resulting transmission duty cycle ...

ANTENNA ARRAY SYSTEM FOR NAVIGATION SYSTEMS

The invention pertains to an antenna array system for Navigation Systems comprising a set of receiving elements, each receiving element comprising at least one antenna or more antennas, the antennas being designed for receiving electro-magnetic signals of at least one certain wavelength, whereby at least two receiving elements of said set of receiving elements are located in distance to each other of at least said one certain wavelength, whereby the signals received by said receiving elements are processed by at least one signal processing unit to thereby determine a location related information. 1. An antenna array system for Navigation Systems comprising a set of receiving elements , each receiving element comprising at least one antenna or more antennas , the antennas being designed for receiving electro-magnetic signals of at least one certain wavelength , whereby at least two receiving elements of said set of receiving elements are located in distance to each other of at least said one certain wavelength , whereby the signals received by said receiving elements are processed by at least one signal processing unit to thereby determine a location related information.2. The antenna array system according to claim 1 , wherein the system comprises a preprocessing unit for each receiving element.3. The antenna array system according to claim 1 , wherein at least two receiving elements each comprises at least two antennas claim 1 , whereby the antennas of said receiving elements are arranged such that the antennas thereof form a planar configuration claim 1 , whereby the planar configuration of said at least two receiving elements form a planar configuration as well.4. The antenna array system according to claim 1 , wherein at least two receiving elements each comprises at least two antennas claim 1 , whereby the antennas of said receiving elements are arranged such that the antennas thereof form a planar configuration claim 1 , whereby the planar configuration of ...

RECEPTION APPARATUS

A reception apparatus includes an intermediate frequency converter, an analog-to-digital converter, a plurality of noise removing units, and a controller. The intermediate frequency converter converts a plurality of transmission signals in different frequency bands into a plurality of intermediate frequency signals having different intermediate frequencies, the plurality of transmission signals each being obtained by demodulating a spectrum-spread spectrum spread signal. The analog-to-digital converter discretizes the plurality of intermediate frequency signals and outputs a plurality of discretization signals. The plurality of noise removing units remove a noise other than a normal thermal noise included in the plurality of discretization signals from the plurality of discretization signals. The controller detects the noise included in the plurality of discretization signals and sets assignment of the plurality of noise removing units to the plurality of discretization signals based on a detection result thereof. 1. A reception apparatus , comprising:an intermediate frequency converter configured to convert a plurality of transmission signals in different frequency bands into a plurality of intermediate frequency signals having different intermediate frequencies, the plurality of transmission signals each being obtained by demodulating a spectrum-spread spectrum spread signal;an analog-to-digital converter configured to discretize the plurality of intermediate frequency signals and output a plurality of discretization signals;a plurality of noise removing units configured to remove a noise other than a normal thermal noise included in the plurality of discretization signals from the plurality of discretization signals; anda controller configured to detect the noise included in the plurality of discretization signals and set assignment of the plurality of noise removing units to the plurality of discretization signals based on a detection result thereof.2. The ...

Cross Correlation Detection In A Satellite Navigation Receiver

A method and a system for detecting cross correlation in a satellite navigation receiver (SNR) in real tune are provided. The SNR parallelly receives navigation signals from multiple satellites via multiple input channels. The SNR extracts ephemeris data from sub-frames of navigation data of each of the navigation signals. The SNR compares the ephemeris data of each navigation signal with the ephemeris data of another navigation signal. The SNR detects cross correlation between the navigation signals when the ephemeris data comparison results in a match and discards the navigation signal with low signal strength. The SNR also retrieves a ranging code from the sub-frames of navigation data of each navigation signal. The SNR compares the ranging code with a pre-programmed satellite identity code of a corresponding satellite. The SNR detects cross correlation when the code comparison results in a mismatch and discards the navigation signal with the mismatched ranging code. 1. A method for detecting cross correlation in a satellite navigation receiver in real time , comprising: at least one processor;', 'a navigation signal reception unit;', 'a non-transitory computer readable storage medium communicatively coupled to said at least one processor and storing modules of said satellite navigation receiver, said at least one processor configured to execute said modules of said satellite navigation receiver, said modules of said satellite navigation receiver comprising a data extraction module, a comparison module, a cross correlation detection module and an integrity verification module;, 'providing a system for said detection of said cross correlation in said satellite navigation receiver in real time, said system comprisingreceiving navigation signals from a plurality of satellites, by said navigation signal reception unit, wherein said navigation signal reception unit comprises a plurality of input channels, wherein each of said plurality of input channels receives a ...

SYSTEMS AND METHODS FOR PROVIDING ANTI-SPOOFING CAPABILITY TO A GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER

Apparatus and methods provide anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver. These GNSS receivers can be, for example, global positioning satellite (GPS) receivers. Via an authentication technique, signals from authentic GNSS sources are distinguished from signals from spoofers. Timing information, such as numerically-controlled oscillator (NCO) settings, used for tracking authenticated signals are then used to generate replica GNSS signals, which are then provided to the second GNSS receiver. As a result, the second GNSS receiver can provide accurate positioning system information in the presence of GNSS spoofers.

MODERNIZED GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) RECEIVERS AND COMMERCIALLY VIABLE CONSUMER GRADE GNSS RECEIVERS

GNSS receivers and systems within such receivers use improvements to reduce memory usage while providing sufficient processing resources to receive and acquire and track E5 band GNSS signals directly (without attempting in one embodiment to receive L1 GNSS signals). Other aspects are also described.

Control and features for satelllite positioning system receivers

Control and feature systems for processing signals from a satellite positioning system include an expert system receiver manager; a joint detection, carrier centring and bit sync acquisition subsystem; peak detection; a multi-dimensional measurement interpolation subsystem; a system for mode switching between a navigational signal; and power control module for receiver.

METHODS OF PROCESSING A RADIO FREQUENCY SIGNAL, SIGNAL PROCESSING DEVICES FOR CARRYING OUT THE METHODS, RADIO FREQUENCY FRONT-ENDS, RADIO RECEIVERS AND GNSS RECEIVERS

A radio frequency signal is frequency-translated to form a complex first intermediate signal where a frequency corresponding to a GPS center frequency is at an intermediate frequency. In a multiplexing conversion unit a complex multiplexed conversion signal which assumes different conversion frequencies is derived from a clock signal where the frequency of the latter is divided alternately by one of two divisors in a divider circuit and further by two in a phase shifter. The conversion signal is mixed with the first intermediate signal in a conversion mixer to provide a multiplexed second intermediate signal where, depending in each case on the conversion frequency, a frequency corresponding to a GLONASS center frequency and a frequency corresponding to a BeiDou center frequency are alternately shifted close to the intermediate frequency. The first intermediate signal and the second intermediate signal are then processed in a baseband unit. 1. A method of processing a radio frequency signal , the method comprising:deriving, from the radio frequency signal, an analog first intermediate signal by frequency translating the radio frequency signal by mixing the radio frequency signal with a frequency translation signal, andderiving, from the first intermediate signal, a multiplexed second intermediate signal by mixing the first intermediate signal with a conversion signal which alternately assumes a plurality of conversion frequencies, where portions of the conversion signal having the same conversion frequency are phase coherent with respect to one another.2. The method of claim 1 , wherein the conversion signal is derived from a clock signal by alternately dividing the frequency of the clock signal by a plurality of divide ratios which change at transition instants claim 1 , with consecutive transition instants being in each case separated by a number of cycles of the clock signal which is a common multiple of the divide ratios.3. The method of claim 2 , wherein a ...

WAVEFRONT GLOBAL NAVIGATION SATELLITE SYSTEM AND INTERFERENCE SIMULATOR SYSTEMS AND METHODS OF USE THEREOF

A method includes outputting a plurality of simulated global navigation satellite system (GNSS) and interference signal pairs comprising a simulated GNSS signal and a simulated interference signal. Each of the simulated GNSS signals, or the simulated interference signals, has an associated reference signal. A calibration GNSS signal that combines the simulated GNSS signals and the associated reference signals, or a calibration interference signal that combines the simulated interference signals and the associated reference signals is received. A phase, time, or a power offset is calculated for the simulated GNSS signals based on the calibration GNSS signal and the associated reference signals, or for the simulated interference signals based on the calibration interference signal and the associated reference signals. A corrected plurality of simulated GNSS and interference signal pairs are output based on the calculated phase, time, or power offset for the simulated GNSS signals or for the simulated interference signals. 1. A method comprising:outputting, by a computing device, a plurality of simulated global navigation satellite system (GNSS) and interference signal pairs each comprising a simulated GNSS signal and a simulated interference signal to a plurality of radiofrequency transmitters, wherein each of the simulated GNSS signals, or each of the simulated interference signals, has an associated reference signal;receiving, by the computing device, from a radiofrequency receiver, one of a calibration GNSS signal that combines each of the simulated GNSS signals and the associated reference signals, or a calibration interference signal that combines each of the simulated interference signals and the associated reference signals;calculating, by the computing device, one or more of a phase offset, a time offset, or a power offset for each of the simulated GNSS signals based on the calibration GNSS signal and the associated reference signals for each of the simulated ...

COOPERATIVE RECEIVER SYSTEM WITH MOBILE TO MOBILE ASSISTANCE

Location of a device within a monitored environment with compromised communication with ranging communication nodes. Specifically, an intermediate device previously located by communication with ranging communication nodes is provided to provide a ranging signal to a device to be located. The device to be located may in turn use a ranging signal received from communication with the previously located device and one or more ranging communication nodes to resolve a location. 1. A method for locating a device relative to a plurality of communication nodes in a monitored environment , comprising:establishing a plurality of communication nodes each having a known location relative to a monitored environment;first locating a first device within the monitored environment based on communication between at least three of the plurality of communication nodes and the first device; andsecond locating a second device within the monitored environment based on communication between the first device and the second device and at least between one of the plurality of communication nodes and the second device.2. The method of claim 1 , wherein the plurality of communication nodes each comprise GNSS receivers operative to:determining the distance from a first GNSS receiver to each of one or more other GNSS receivers;each GNSS receiver generating pseudoranges and correlation values associated with one or more GNSS satellites;collecting pseudoranges and correlation values from each of the first GNSS receiver and the one or more other GNSS receivers; andfrom the pseudoranges, correlation values, and determined distance to each of the one or more other GNSS receivers, generating a best solution for the position of the first GNSS receiver to determine the known location of each communication node comprising a respective one of the GNSS receivers.3. The method of claim 2 , wherein the distance determining is performed cooperatively by the first GNSS receiver and the one or more other GNSS ...

Filtering out a jammer signal

A low noise amplifier (LNA) assembly comprising a filter circuit for receiving signals from a Mobile Satellite Service (MSS) band and a Radio Navigation Satellite Service (RNSS) band; and an alternative filter circuit configured to filter out a jammer signal.

INTERFERENCE MAP FOR GNSS DEVICE

Systems and methods for aggregating interference data and generating visual representations of the interference data are provided. In one example method, interference data may be received from multiple GNSS receivers positioned at various geographical locations. A request for a visual representation of interference at a location may be received. In response to the request, a visual representation of interference at the requested location may be generated based on at least a portion of the received interference data. The visual representation may include a map overlaid with visual indicators of interference indicating a location and magnitude of the interference. The visual representation of interference at the requested location may then be transmitted to a computing device requesting the representation. 1. A computer-implemented method for aggregating interference data and generating a visual representation of the interference data , the computer-implemented method comprising:receiving, one or more processors, interference data from a plurality of GNSS receivers;receiving, by the one or more processors, a request for a visual representation of interference at a location; andgenerating the visual representation of interference at the location based on at least a portion of the interference data, wherein the visual representation of interference comprises a map overlaid with visual indicators of interference.2. The computer-implemented method of claim 1 , wherein the interference data comprises a location claim 1 , frequency claim 1 , time claim 1 , and magnitude of interference from a plurality of interference sources.3. The computer-implemented method of claim 1 , wherein the request is received from a portable GNSS device.4. The computer-implemented method of claim 1 , wherein the visual indicators of interference comprises numerical values positioned on the map at locations of interference from interference sources represented by the visual indicators claim 1 , ...

METHOD OF DETECTING INTERFERENCE IN A SATELLITE RADIO-NAVIGATION SIGNAL

Method of detecting interference in a satellite radio-navigation signal, characterized in that it comprises the following steps: 1. Method for detecting interference in a satellite radio-navigation signal , comprising the steps of:determining a first temporal position for which the correlation between a local spreading code and the said signal, offset by the said position, is maximum;determining a plurality of measurements of correlation between the said local spreading code and the said signal offset by a plurality of secondary temporal positions, the said plurality of secondary temporal positions and the said first temporal position being regularly spaced;determining, for a plurality of different correlation measurement pairs formed by two measurements at two consecutive temporal positions, the phase difference between the two correlation measurements of the said pair;calculating an item of information representative of the standard deviation of the said phase difference; andcomparing the said item of information with a detection threshold configured at least as a function of the ratio of the powers of the signal and of the interference.2. Method for detecting interference in a satellite radio-navigation signal according to claim 1 , in which the said item of information is equal to the absolute value of the ratio between the mean of the said phase difference and the standard deviation of the said phase difference.3. Method for detecting interference in a satellite radio-navigation signal according to claim 1 , in which the said correlation measurements are compensated for the expected value of the correlation in the absence of interference.4. Device for receiving satellite radio-navigation signals comprising:first calculation means, including a processor, configured to determine a first temporal position for which the correlation between a local spreading code and the said signal, offset by the said position, is maximum and to determine a plurality of ...

Delivery of precise time to gps receivers in an on-board unit over dedicated short range communications or c-v2x and way in dsrc connected vehicle network to enhance obe gps performance

On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the GPS accurate time and provides the GPS accurate time to the GPS receiver. The determining of the GPS accurate time is dependent upon the accurate frequency in the signal.

DELIVERY OF PRECISE TIME TO GPS RECEIVERS IN AN ON-BOARD UNIT OVER DEDICATED SHORT RANGE COMMUNICATIONS OR C-V2X AND WAY IN DSRC CONNECTED VEHICLE NETWORK TO ENHANCE OBE GPS PERFORMANCE

On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the GPS accurate time and provides the GPS accurate time to the GPS receiver. The determining of the GPS accurate time is dependent upon the accurate frequency in the signal. 1. On-board equipment for a motor vehicle , the on-board equipment comprising:a radio configured to receive a signal from road side equipment, the signal having accurate GPS location information; anda GPS receiver communicatively coupled to the radio, the on-board equipment being configured to determine an accurate GPS location and provide the accurate GPS location to the GPS receiver, the determining of the accurate GPS location being dependent upon the accurate GPS location information in the signal.2. The on-board equipment of wherein the radio comprises a DSRC radio.3. The on-board equipment of wherein the radio comprises a C-V2X radio.4. The on-board equipment of Wherein the on-board unit and GPS receiver are configured to determine the accurate GPS location in less than ten seconds.5. The on-board equipment of wherein the accurate GPS location includes a position and elevation.6. The on-board equipment of wherein the signal is dependent upon Ephemeris data.7. The on-board equipment of wherein the signal includes Ephemeris data.8. A method of operating on-board equipment in a motor vehicle claim 1 , the method comprising:providing the on-board equipment with an on-board unit including a radio and a GPS receiver;using the radio to receive a signal from road side equipment, the signal having accurate GPS location information;determining within the on-board equipment an accurate GPS location, the determining of the accurate GPS location being dependent upon the accurate GPS location information; andproviding the accurate GPS ...

APPARATUS FOR RECEIVING NAVIGATION SIGNAL AND OPERATING METHOD OF THE SAME

The present invention provides a navigation signal receiving apparatus, including: a first navigation information generating unit which receives at least one navigation signal; and a second navigation information generating unit which receives the at least one navigation signal, compares reference information generated based on a first navigation signal with measurement information generated based on the at least one navigation signal to determine whether the at least one navigation signal includes a second navigation signal, estimates normal measurement information using the reference information when the at least one navigation signal includes the second navigation signal, and controls the first navigation information generating unit to trace the first navigation signal which is included in the at least one navigation signal based on the normal measurement information. 1. A navigation signal receiving apparatus , comprising:a first navigation information generating unit which receives at least one navigation signal; anda second navigation information generating unit which receives the at least one navigation signal, compares reference information generated based on a first navigation signal with measurement information generated based on the at least one navigation signal to determine whether the at least one navigation signal comprises a second navigation signal, estimates normal measurement information using the reference information when the at least one navigation signal includes the second navigation signal, and controls the first navigation information generating unit to trace the first navigation signal which is included in the at least one navigation signal based on the normal measurement information.2. The navigation signal receiving apparatus of claim 1 , wherein the second navigation information generating unit comprises:a signal processing unit which processes the at least one navigation signal to generate the reference information or the measurement ...

RECEIVER DUAL-REFLECTOR ANTENNA SYSTEM FOR INTERFERENCE SUPPRESSION ONBOARD SATELLITE

A system for interference suppression onboard a satellite may include an antenna that is configured to receive uplink signals from a ground-coverage area and to generate a first signal. A spot-beam antenna may be configured to receive interference signals and to generate a second signal. A processor may be configured to receive the first signal from the antenna and the second signal from the spot-beam antenna and to perform a cross-correlation to generate a composite signal that includes a null at an interference frequency. The antenna may be a shaped reflector antenna and the spot-beam antenna may be a parabolic reflector antenna. 1. A system for interference suppression onboard a satellite , the system comprising:an antenna configured to receive uplink signals from a ground-coverage area and to generate a first signal;a spot-beam antenna configured to receive interference signals and to generate a second signal; anda processor configured to receive the first signal from the antenna and the second signal from the spot-beam antenna and to generate a composite signal with the interference signals suppressed.2. The system of claim 1 , wherein the processor is configured to filter the first signal from the antenna and the second signal from the spot-beam antenna prior to generating the composite signal with the interference signals suppressed only at selected frequencies claim 1 , and wherein the processor comprises a digital cross-correlator and summer claim 1 , and wherein the digital cross-correlator is configured to perform the cross-correlation by comparing the first and the second signals claim 1 , finding a relative amplitude and phase of the first and the second signals claim 1 , and wherein the summer is configured to combine the first and the second signals with same amplitudes and a 180 degree relative phase at the interference frequency to create the composite signal with the interference signals suppressed.3. The system of claim 1 , wherein the antenna ...

Systems and methods for cancellation of cross-coupled noise

Systems and methods for canceling cross-coupled satellite signals in a LNB IC include receiving a first satellite signal at a first pin of the LNB IC and adjusting the first satellite signal by applying a first adaptive filter to the first satellite signal signal, the first adaptive filter having first filter coefficients; combining the adjusted first satellite signal with a second satellite signal received at a second pin of the LNB IC to generate a first combined satellite signal; measuring the total output power of the combined satellite signal; changing the filter coefficients of the first adaptive filter; remeasuring the total output power of the first combined satellite signal after the changing of the first filter coefficients to determine whether the total power of the first combined satellite signal has decreased.

SYSTEMS AND METHODS FOR INTERFERENCE DETECTION IN SHARED SPECTRUM CHANNELS

A communication system, includes a satellite receiver in operable communication with a central server, a cellular node configured to operate within a proximity of the satellite receiver, and at least one mobile communication device configured to communicate (i) with the cellular node, (ii) within the proximity of the satellite receiver, and (iii) using a transmission signal capable of causing interference to the satellite receiver. The satellite receiver is configured to detect a repeating portion of the transmission signal and determine a potential for interference from the at least one mobile communication device based on the detected repeating portion. 1. A communication system , comprising:a satellite receiver in operable communication with a central server;a cellular node configured to operate within a proximity of the satellite receiver; andat least one mobile communication device configured to communicate (i) with the cellular node, (ii) within the proximity of the satellite receiver, and (iii) using a transmission signal capable of causing interference to the satellite receiver,wherein the satellite receiver is configured to detect a repeating portion of the transmission signal and determine a potential for interference from the at least one mobile communication device based on the detected repeating portion.2. The communication system of claim 1 , wherein the at least one mobile communication device is an LTE device and the transmission signal is a long term evolution (LTE) signal.3. The communication system of claim 2 , further comprising a beacon detector (i) in operable communication with at least one of the central server and the satellite receiver claim 2 , and (ii) configured to measure the repeating portion of the LTE signal.4. The communication system of claim 2 , wherein the LTE signal comprises a plurality of broadcast frames.5. The communication system of claim 4 , wherein each frame of the plurality of broadcast frames comprises a plurality of ...

CORRECTIONS RADIO ANTENNA MOUNT ON THE RANDOME OF A GNSS RECEIVER

Systems and methods for receiving GNSS and corrections signals by a GNSS rover. The GNSS rover may include a radome enclosing a GNSS antenna and a GNSS front end. The GNSS rover may also include a corrections antenna attached to a connection housing and configured to receive corrections signals from a base station. The connection housing may be configured to removably attach to the radome. The GNSS rover may further include a corrections front end enclosed within the radome and electrically coupled to the corrections antenna via capacitive coupling when the connection housing is removably attached to the radome. The GNSS rover may further include a first capacitor plate enclosed within the radome and positioned substantially parallel to an outer wall of the radome and a second capacitor plate enclosed within the connection housing and positioned substantially parallel to an outer wall of the connection housing. 1. A global navigation satellite system (GNSS) rover comprising:a radome;a GNSS antenna configured to receive GNSS signals from one or more GNSS satellites;a GNSS front end enclosed within the radome and electrically coupled to the GNSS antenna, wherein the GNSS front end is configured to generate GNSS digital samples based on the received GNSS signals;a corrections antenna configured to receive corrections signals from a base station;a connection housing attached to the corrections antenna, wherein the connection housing is configured to removably attach to the radome;a corrections front end enclosed within the radome and electrically coupled to the corrections antenna via capacitive coupling when the connection housing is removably attached to the radome, wherein the corrections front end is configured to generate corrections digital samples based on the received corrections signals;a first capacitor plate enclosed within the radome and positioned substantially parallel to an outer wall of the radome, wherein the first capacitor plate is electrically ...

Wearable device antenna apparatus and system

A wearable wireless communication device incorporating one or more 3D-antennas into a housing frame of the device using Laser Directed Structuring (LDS). The device dimensions are chosen as to position the antennas at optimum separation distance to limit the amount of SAR exposure to the user. One or more antennas operate in conjunction with a metal ground plane extension element of the wearable device. The metal ground plane extension is conductively coupled to a flexible printed circuit board (FPCB) ground plane of the wireless communication device. The ground plane extension element together with the ground plane provided by the FPCB effectively increases the equivalent resonant length thereof, to excite one or more resonant modes of an antenna incorporated in the device housing frame, expanding the operation bandwidth of the communication device. One or more Matching Network is used to tune the impedances of the antennas.

METHOD AND APPARATUS FOR MAP INFERENCE SIGNAL RECONSTRUCTION

The present application generally relates to methods and apparatus for inferring map data from GPS measurements. More specifically, the method and apparatus to receive a plurality of measurement data from vehicular GPS measurements and, optionally, additional sensor data. The system is then operative to generate latitude and longitude errors from the covariance matrix and apply this information to a plurality of measurement data in order to determine an actual location in response to the plurality of measurement data. 1. A method comprising:receiving a measured location wherein the measured location includes an actual location and a measurement noise;generating a covariance matrix in response to the measurement noise and the sensor noise;generating a latitude error and a longitude error in response to the covariance matrix; anddetermining the actual location in response to the latitude error, the longitude error and the measured location.2. The method of further comprising receiving a measured sensor value wherein the measured sensor value includes a true sensor value at the actual location and a sensor noise.3. The method of wherein the measured sensor value is generated in response to an accelerometer and a steering wheel sensor.4. The method of wherein the measured sensor value is generated by an accelerometer.5. The method of further comprising generating a map in response to the actual location.6. The method of further comprising transmitting the map to a vehicle.7. The method of further comprising transmitting the map to a vehicle control system.8. The method of wherein the actual location is determined in response to a plurality of measured locations.9. The method of wherein the measured location is determined in response to a global positioning system.10. The method of further comprising updating a map in response to the actual location.11. A method of map inference comprising:receiving a plurality of measured locations wherein each of the plurality of ...

Method and device for detecting correction information for an antenna of a vechicle

The invention relates to a method and corresponding device for detecting correction information for an antenna for receiving data of a satellite of a satellite navigation system. The method includes determining first distance information of the antenna relative to a satellite of a satellite navigation system, capturing position information and orientation information of the antenna on the basis of sensor information, determining second distance information of the antenna relative to the satellite on the basis of the position information captured by means of sensor information, detecting a deviation of the first distance information from the second distance information, determining correction information on the basis of the detected deviation, and storing, in a data memory, the correction information regarding the orientation information captured by the sensor information. The correction information can be used in particular for correcting an angle-dependent phase center offset.

COMPACT INTEGRATED GNSS ANTENNA SYSTEM WITH VERTICAL SEMITRANSPARENT SCREEN FOR REDUCING MULTIPATH RECEPTION

An antenna system includes a right-hand circularly polarized antenna for receiving Global Navigation Satellite System (GNSS) signals and located on a receiver housing; a vertical semitransparent screen for providing an Down/Up ratio 2. The antenna system of claim 1 , wherein the semitransparent screen includes an upper slot and a lower slot to which sets of lumped elements are connected claim 1 ,wherein nominal values of the lumped elements connected to the upper slot provide the Down/Up ratio of −13 dB or better in the nadir direction in the HF band; andwherein nominal values of the lumped elements connected to the lower slot provide the Down/Up ratio of −13 dB or better in the nadir direction in the LF band.3. The antenna system of claim 1 , wherein the semitransparent screen includes an upper slot and a lower slot to which sets of lumped elements are connected claim 1 ,wherein nominal values of the lumped elements connected to the upper slot provide the Down/Up ratio of −13 dB or better in the nadir direction in the LF band; andwherein nominal values of the lumped elements connected to the lower slot provide the Down/Up ratio of −13 dB or better in the nadir direction in the HF band.4. The antenna system of claim 1 , wherein the vertical semitransparent screen includes one rib shaped as a cylinder with a center on a Z axis of the antenna.5. The antenna system of claim 4 , wherein the vertical semitransparent screen further includes vertical slots to which the sets of lumped elements are connected.6. The antenna system of claim 1 , wherein the semitransparent screen includes an upper slot and a lower slot claim 1 , and wherein the set of lumped elements includes an upper set and a lower set claim 1 , and wherein the upper set is connected across the upper slot claim 1 , and the lower set is connected across the lower slot.7. The antenna system of claim 1 , wherein the vertical semitransparent screen is generally square in plan view.8. The antenna system of claim 1 ...

SYSTEMS AND METHODS FOR SIMULATING PERFORMANCE OF RECEIVERS IN REALISTIC INTERFERENCE SCENARIOS

Systems and methods for simulating performance of receivers in realistic interference scenarios are provided herein. A method for simulating the performance of a receiver may include (a) generating a set of observables that a receiver in a truth state would ideally see; (b) adding interference to the set of observables to generate a set of corrupted observables; and (c) generating a position, navigation, and timing (PNT) solution using the set of corrupted observables. 1. A method for simulating the performance of a receiver , the method comprising:(a) generating a set of observables that a receiver in a truth state would ideally see;(b) adding interference to the set of observables to generate a set of corrupted observables; and(c) generating a position, navigation, and timing (PNT) solution using the set of corrupted observables.2. The method of claim 1 , wherein the truth state comprises one or more of a position claim 1 , geometry claim 1 , kinematics claim 1 , and dynamics of the receiver.3. The method of claim 2 , wherein the truth state further comprises one or more of a position claim 2 , geometry claim 2 , kinematics claim 2 , and dynamics of one or more transmitters.4. The method of claim 1 , wherein the truth state comprises a previous PNT solution of the receiver.5. The method of claim 1 , wherein generating the set of observables comprises applying a signal transmission model to the truth state.6. The method of claim 5 , wherein the signal transmission model comprises a global positioning system (GPS) constellation model claim 5 , a Galileo constellation model claim 5 , a GLONASS constellation model claim 5 , or a Doppler orbitography and radiopositioning integrated by satellite (DORIS) constellation model.7. The method of claim 1 , wherein the set of observables comprises one or more of: pseudorange claim 1 , range claim 1 , time-delay-of-arrival (TDOA) claim 1 , navigation data claim 1 , carrier phase claim 1 , code phase claim 1 , Doppler claim 1 , ...

Radio receivers for position determination systems

A radio receiver for receiving radio signals from at least one position determination system, having a receiving apparatus, and an antenna arrangement. The antenna arrangement has at least one radio signal antenna for receiving radio signals and a first feed element and a second feed element. The first feed element and the second feed element have different polarization-dependent sensitivities. The antenna arrangement has a first radio signal line and a second radio signal line. The first radio signal line is designed to provide a radio signal received by the antenna arrangement as a first radio reception signal. The second radio signal line is designed to provide a further radio signal received by the antenna arrangement as a second radio reception signal. A signal processing apparatus designed to determine a position of the radio receiver on the basis of the first radio reception signal and the second radio reception signal.

METHOD AND SYSTEM FOR REAL-TIME VEHICLE LOCATION AND IN-VEHICLE TRACKING DEVICE

A self-contained integrated portable vehicle tracking system that does not comprise any wired connection to any device or location external to the container unit is disclosed. The tracking system comprises a microcontroller unit (MCU); a GPS receiver in communication with said MCU; a GPS patch antenna connected to said MCU; a wireless transceiver in communication with said MCU; a power source comprising a solar cell; and a power management system. In addition, a method for determining the position of a moving vehicle with high accuracy is disclosed. Unlike methods known in the art, the method disclosed herein does not require the use of an inertial navigation system or continuous operation of a GPS. The method comprises determining the velocity of the moving object from a determination of its speed and angular velocity and correlating the signals obtained from the velocity sensors with a map data layer. 1. A method for calculating the position and direction of a moving vehicle , wherein said method comprises:determining said vehicle's position at time to;{'sub': '0', "determining said vehicle's linear velocity at time t>tfrom output of a linear velocity sensor in physical contact with, and at a known orientation relative to, said vehicle;"}determining said vehicle's angular velocity at said time t from output of an angular velocity sensor in physical contact with, and at a known orientation relative to, said vehicle;calculating from said linear velocity and said angular velocity a calculated arc A along which said vehicle is moving, said calculated arc A characterized by a calculated radius R;obtaining a map layer;extracting from said map layer an estimated arc A′ along which said vehicle is moving, said estimate arc A′ characterized by an estimated radius R′; and, a correlation between said calculated arc A and said estimated arc A′; and,', "a correlation between said calculated radius R and said estimated radius R′; thereby obtaining said vehicle's position and ...

Predicting Radio Frequency Interference Events

Systems and methods for determining a communication schedule for a satellite system are provided. For instance, orbital data indicative of one or more orbital elements of a first satellite system and one or more second satellite systems can be obtained. Frequency data frequency data indicative of one or more frequencies at which the one or more second satellite systems transmit data can also be obtained. One or more expected radio frequency interference events associated with the first satellite system can then be determined based at least in part on the orbital data and the frequency data. One or more downlink periods during which data is transmitted by the first satellite and one or more silent periods during which data is not transmitted by the first satellite can then be scheduled based at least in part on the expected radio frequency interference events. 1. A computer-implemented method of determining a communication schedule for a satellite system , the method comprising:obtaining, by one or more computing devices, orbital data indicative of one or more orbital elements of a first satellite system and one or more second satellite systems;obtaining, by the one or more computing devices, frequency data indicative of one or more frequencies at which the one or more second satellite systems transmit data;determining, by the one or more computing devices, one or more expected radio frequency interference events associated with the first satellite system based at least in part on the orbital data and the frequency data; andscheduling, by the one or more computing devices, one or more transmission periods during which data is transmitted to or from the first satellite and one or more silent periods during which data is not transmitted to or from the first satellite based at least in part on the expected radio frequency interference events.2. The computer-implemented method of claim 1 , further comprising determining claim 1 , by the one or more computing devices ...

MITIGATION OF RADIO FREQUENCY INTERFERENCE (RFI) IN GLOBAL POSITIONING SYSTEM (GPS) SIGNALS

A technology is provided for reducing pulsed radio frequency interference. The GPS signal may be received at a GPS device. The GPS device may include a GPS receiver. The GPS signal may include a plurality of sign and magnitude bits. Pulsed RFI may be detected in the GPS signal based on samples of the magnitude bits in the GPS signal. The pulsed RFI received at the GPS receiver may be reduced by communicating a blank signal when the samples of the magnitude bits indicate the pulsed RFI. 1. A method for reducing pulsed radio frequency interference (RFI) , the method comprising:receiving a GPS signal at a GPS device, wherein the GPS signal includes a plurality of sign and magnitude bits and the GPS device includes a GPS receiver;detecting pulsed RFI in the GPS signal based on samples of the magnitude bits in the GPS signal; andreducing the pulsed RFI received at the GPS receiver by communicating a blank signal when the samples of the magnitude bits indicate the pulsed RFI.2. The method of claim 1 , further comprising communicating the blank signal to the GPS receiver for a predefined time period.3. The method of claim 1 , further comprising communicating GPS signals that do not contain pulsed RFI to the GPS receiver claim 1 , the GPS signals including one or more intervals of blank signals.4. The method of claim 1 , further comprising communicating GPS signals that do not contain pulsed RFI to a selective availability anti-spoofing module (SAASM) included in the GPS device.5. The method of claim 1 , further comprising detecting pulsed RFI in the GPS signal by detecting at least 100 consecutive magnitude bits out of 128 samples indicate that the GPS signal contains the pulsed RFI.6. The method of claim 1 , further comprising lowering an automatic gain control (AGC) of the GPS device when 1280 consecutive samples of the magnitude bits do not indicate pulsed RFI.7. The method of claim 1 , further comprising:detecting the pulsed RFI in the GPS signal based on GPS signal ...

Method and System for Integrated GLONASS and GPS Processing

An integrated global navigation satellite system (GNSS) receiver may be operable to decompose GNSS IF signals associated with GPS satellites and/or GLONASS satellites into a constituent narrowband GPS data stream and/or a plurality of constituent narrowband GLONASS data streams utilizing, for example, a GPS IF tuner and/or one or more GLONASS IF tuners. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be processed at reduced sampling rates utilizing a shared sample memory in the integrated GNSS receiver. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be stored in allocated sections of the shared sample memory. The stored narrowband GLONASS data streams and/or the stored narrowband GPS data stream may be processed using a correlation such as a fast Fourier transform (FFT) correlation. 1. A global navigation satellite system (GNSS) receiver , comprising:a processor configured to store a first and a second downsampled GNSS datastream corresponding to a first and a second received GNSS signal, respectively, in a corresponding first and second allocated portion of a shared sample Memory; anda correlation engine configured to access the shared sample memory to process the first and second downsampled GNSS datastreams.2. The GNSS receiver of claim 1 , further comprising:a first tuner configured to sample the first received GNSS signal according to a first sampling rate to provide a first narrowband GNSS datastream, anda second tuner configured to sample the second received GNSS signal according to a second sampling rate to provide a second narrowband GNSS datastream.3. The GNSS receiver of claim 2 , further comprising:a first decimator configured to sample the first downsampled GNSS datastream according to a first decimation rate to provide the first narrowband GNSS datastream; anda second decimator configured to sample the second downsampled GNSS datastream according to a second decimation rate to provide the ...

POLARIZATION CONFIGURABLE GNSS SMARTPHONE ANTENNA

A Global Navigation Satellite System (GNSS) receiver for a portable device includes a first linear polarization antenna configured to receive a first linear polarization component of a GNSS signal; a second linear polarization antenna configurable to receive a second linear polarization component of the GNSS signal, a radio frequency signal conforming to a second wireless communication technology, or both; and a hybrid coupler that combines the first linear polarization component of the GNSS signal and the second linear polarization component of the GNSS signal to generate a circularly polarized GNSS signal. In some embodiments, the GNSS receiver includes a tuner to tune the resonant frequency of the second linear polarization antenna. In some embodiments, the GNSS receiver includes a switch or a filter to connect or disconnect the second linear polarization antenna from the hybrid coupler to implement a circular polarization antenna or a linear polarization ante. 1. A Global Navigation Satellite System (GNSS) receiver comprising:a first linear polarization antenna configured to receive a radio frequency signal conforming to a first wireless communication technology, wherein the radio frequency signal conforming to the first wireless communication technology includes a first linear polarization component of a GNSS signal;a second linear polarization antenna configurable to receive a second linear polarization component of the GNSS signal, a radio frequency signal conforming to a second wireless communication technology, or both; and a first port electrically coupled to the first linear polarization antenna;', 'a second port electrically coupled to the second linear polarization antenna; and', 'a third port outputting a combined GNSS signal of the first linear polarization component of the GNSS signal and the second linear polarization component of the GNSS signal,', 'wherein a difference between a phase delay from the second port to the third port and a phase delay ...

HARDWARE FRONT-END FOR A GNSS RECEIVER

A hardware front-end for a software-defined GNSS receiver, which includes an antenna connected to a transmission line that is connected to a pair of separate circuits, one for receiving L1 signals and one for receiving L2 signals. Each circuit includes at least one bandpass filter, at least one LNA, and a single-chip GNSS receiver that receives analog RF signals and provides digitized I and Q signals. The pair of circuits differ in that a first one is designed to receive, filter, and amplify RF signals at the L1 frequency corresponding to the designed input frequency of the receiver and the second one is designed to receive, filter, and amplify RF signals at the L2 frequency, which is significantly different from the first frequency. The second circuit also includes a mixer to convert the L2 frequency to the L1 frequency, so that a similar receiver can be used in each circuit. 119-. (canceled)20. A GNSS antenna assembly , comprising:a multilayer antenna board containing an L1 patch antenna of a first width, an L2 patch antenna of a second width that is greater than the first width, a ground plane of a third width that is equal to or greater than the second width, and one or more electrical contact pads on a first surface of the antenna board, the contact pads being in conductive contact with the ground plane of the antenna board;a ground plane board containing a ground plane of a fourth width that is greater than the third width and one or more electrical contact pads on a first surface of the ground plane board, the contact pads being in conductive contact with the ground plane of the ground plane board;wherein the contact pads of the antenna board and the contact pads of the ground plane board are in conductive contact with each other.21. A GNSS antenna assembly as defined in claim 20 , wherein there are a plurality of contact pads on each of the antenna board and the ground plane board and the contact pads of the antenna board and the contact pads of the ground ...

HARDWARE FRONT-END FOR A GNSS RECEIVER

A hardware front-end for a software-defined GNSS receiver, which includes an antenna connected to a transmission line that is connected to a pair of separate circuits, one for receiving L1 signals and one for receiving L2 signals. Each circuit includes at least one bandpass filter, at least one LNA, and a single-chip GNSS receiver that receives analog RF signals and provides digitized I and Q signals. The pair of circuits differ in that a first one is designed to receive, filter, and amplify RF signals at the L1 frequency corresponding to the designed input frequency of the receiver and the second one is designed to receive, filter, and amplify RF signals at the L2 frequency, which is significantly different from the first frequency. The second circuit also includes a mixer to convert the L2 frequency to the L1 frequency, so that a similar receiver can be used in each circuit. 1. A hardware front-end for a software-defined GNSS receiver , the front-end comprising:an antenna; a first low-noise amplifier that amplifies the first RF signal; and', 'a first direct conversion receiver that downconverts the first RF signal to create separate, digitized I and Q channels;, 'a first RF circuit that is coupled to and receives a first RF signal at a first RF frequency in a first frequency range from the antenna, and produces a first GNSS signal, the first RF circuit including a second low-noise amplifier that amplifies the second RF signal;', 'a first bandpass filter that filters the second RF signal;', 'an oscillator that provides a signal at an LO frequency;', 'a mixer that is receptive of the second RF signal and receptive of the LO frequency signal and mixes the two signals to produce a third RF signal that is in the first frequency range; and', 'a second direct conversion receiver that converts the third RF signal into separate, digitized I and Q channels; and, 'a second RF circuit that is coupled to and receives a second RF signal at a second RF frequency from the antenna ...

Integrated, externally-mounted ads-b device

An integrated, externally-mounted Automated Dependent Surveillance-Broadcast (ADS-B) device comprising in one embodiment a 1030 MHz transmitter, a 1030 MHz antenna, a 1090 MHz receiver, a 1090 MHz antenna, a GNSS receiver, at least one GNSS antenna, a 978 MHz transmitter, and a 978 MHz antenna, wherein these components are integrated into a single enclosure, and wherein the GNSS antenna is placed at least partially into a projection extending out from the main enclosure body, such that the GNSS antenna has improved visibility to GNSS signals originating from altitudes above the current altitude of aircraft when the ADS-B device is mounted on the bottom of an aircraft.

ANTENNA OPTIMIZATION BASED UPON MAP AND SENSOR DATA

A method of optimizing a sensor antenna for a vehicle () includes operating a sensor antenna using a first predetermined antenna beam pattern from a plurality of predetermined antenna beam patterns. A map location of a vehicle is determined, and a second predetermined antenna beam pattern is selected from the plurality of predetermined antenna beam patterns based upon the map location of the vehicle (). The second predetermined antenna beam pattern is then used with the vehicle sensor (). 1. A method of optimizing a sensor antenna for a vehicle comprising:operating a sensor antenna using a first predetermined antenna beam pattern from a plurality of predetermined antenna beam patterns;determining a map location of a vehicle;selecting a second predetermined antenna beam pattern from the plurality of predetermined antenna beam patterns based upon the map location of the vehicle; andusing the second predetermined antenna beam pattern with the vehicle sensor.2. The method of claim 1 , wherein the map location determining step includes receiving GNSS data for the vehicle.3. The method of claim 1 , wherein the map location determining step includes inferring the map location by referencing at least one of anti-lock braking system data claim 1 , inertial measurement unit data claim 1 , wheel rotation data claim 1 , vehicle speed data claim 1 , and/or steering data.4. The method of claim 1 , wherein the sensor antenna is at least one of a V2X sensor antenna claim 1 , a V2V sensor antenna claim 1 , a V2I sensor antenna claim 1 , a V2P sensor antenna claim 1 , a V2N sensor antenna claim 1 , a C-V2X sensor antenna claim 1 , a C-V2V sensor antenna claim 1 , a C-V2I sensor antenna claim 1 , a C-V2P sensor antenna claim 1 , and/or a C-V2N sensor antenna.5. The method of claim 1 , wherein the plurality of predetermined antenna beam patterns excludes an omnidirectional antenna beam pattern and a steered or transient antenna beam pattern.6. The method of claim 1 , wherein the map ...

HIGH DEGREE OF FREEDOM ARRAY

An array of elements suitable for adaptive processing in an extreme jammed environment comprised of a plurality of smaller sub-arrays of element clusters that have natural orthogonal spatial modes of excitation, wherein the improvement comprises sub-arrays with spatial orthogonality of feed modes, cross-sub-array combination to maximize pre-processing sub-array spacing and diversity of relative configuration, a high-input analog nuller used on the pre-processing sub-array therein, a high-input analog nuller is used to null a dominant jamming signal, possibly exceeding normal communication signal levels, so that the sub-array processed signals could then be fed to an antenna processor with simultaneous beam steering and null steering.

Vertical Accuracy Improvements for Dynamic Real-Time Kinematic Reference Stations

A system for vertical accuracy improvement includes a reference station, a rover, and a base station in communication with the reference station and the rover. The base station includes a GNSS antenna, an actuator coupled to the GNSS antenna, a wireless transceiver, a processor, and non-transitory computer readable media comprising instructions executable by the processor. The instructions may be executed to cause the base station to receive a first vertical error from the reference station. The base station may further be configured to determine a second vertical position at which the first vertical error is reduced, and adjust the GNSS antenna to be in the second vertical position. The base station may further be configured to generate correction data based at least in part on the phase of the carrier wave signal at the second vertical position, and transmit the correction data to the rover. 1. A system comprising:a reference station comprising a first global navigation satellite system (GNSS) antenna in communication with a GNSS satellite, wherein the reference station is configured to determine a first vertical position and a first vertical error in the first vertical position based, at least in part, on a phase of a carrier wave signal of the GNSS satellite;a rover comprising a second GNSS antenna in communication with the GNSS satellite; a third GNSS antenna;', 'an actuator coupled to the third GNSS antenna configured to adjust a vertical position of the third GNSS antenna;', 'a wireless transceiver;', 'a processor; and', receive, via the reference station, the first vertical error, wherein the first vertical error is based at least in part on the phase of the carrier wave signal when the third GNSS antenna is at a first vertical position;', 'determine a second vertical position wherein movement of the third GNSS antenna to the second vertical position produces a modified first vertical error at the reference station less than the first vertical error;', ' ...

METHOD AND APPARATUS FOR USING DUAL-POLARIZATION ANTENNA

An apparatus includes an antenna assembly including an antenna configured to receive a signal and, based on the received signal, generate a first linearly polarized signal at a first feed point and a second linearly polarized signal at a second feed point; and a switching circuit configured to periodically switch between the first feed point and the second feed point to select a polarized signal between the first and second polarized signals at a point in time based on a switching signal. 1. An apparatus , comprising: an antenna configured to receive a signal and, based on the received signal, generate a first linearly polarized signal at a first feed point and a second linearly polarized signal at a second feed point; and', 'a switching circuit configured to periodically switch between the first feed point and the second feed point to select a polarized signal between the first and second polarized signals at a point in time based on a switching signal., 'an antenna assembly, comprising2. The apparatus of claim 1 , further comprising: process the selected polarized signal to generate at least a right-hand circular polarized (RHCP) signal; and', 'generate the switching signal., 'a receiver, coupled to receive the selected polarized signal, configured to3. The apparatus of claim 2 , further comprising: transmit the selected polarized signal from the antenna assembly to the receiver; and', 'transmit the generated switching signal from the receiver to the antenna assembly., 'a cable that couples the antenna assembly and the receiver and is configured to4. The apparatus of claim 3 , wherein:the switching signal is a signal that is synchronized with an oscillating signal and controls a switch in the switching circuit to switch between the first feed point and the second feed point, andthe switching circuit is configured to time-division multiplex the first and second polarized signals based on the synchronized switching signal.5. The apparatus of claim 4 , wherein the ...

DATA COLLECTION DEVICE AND METHOD FOR THE LOCALISATION OF A SOURCE OF INTERFERENCE

A data collection device carried on board a satellite and making it possible to localise a source of interference, without using neighbouring satellites, comprises: a reception device able to receive the frequency on the ground of the interference; at least three antenna points arranged on the satellite so as to be able to receive a radiofrequency signal coming from the target surface; a processor able to determine the amplitude of the interference signal at the level of each of the antenna points; a connection device able to connect successively each of the antenna points to the processor. 1. A data collection device enabling the localisation of a source of interference in a target surface when the frequency of the interference on the ground is known , the data collection device being intended to be carried on board a satellite , the data collection device comprising:a reception device able to receive the frequency on the ground of the interference;at least three antenna points arranged on the satellite so as to be able to receive a radiofrequency signal coming from the target surface;a processor able to determine the amplitude of the interference signal at the level of each of the antenna points;a connection device able to connect each of the antenna points to the processor.2. The data collection device according to claim 1 , wherein the processor comprises:an agile filter able to select a target frequency band in the signal received by one of the antenna points and to convert it into a signal having an intermediate frequency band, the target frequency band containing the frequency on the ground of the interference; convert the signal having an intermediate frequency band into a digital signal and', 'determine a frequency bin in which lies the frequency of the interference at the level of the satellite;', 'determine, in said frequency bin, for each of the signals received by each of the antenna points, the amplitude of the interference at the level of each of the ...

SYSTEM AND PROCESS OF DETERMINING VEHICLE ATTITUDE

A system and process that can be used to determine vehicle attitude with only one navigation receiver. In one embodiment, the antenna of the navigation receiver is driven with a signal that modulates sensitivity in azimuth. The received navigation signal strength is demodulated by the phase at which the antenna is sweeping and a phase angle and a magnitude for the incoming signal are calculated. Using this calculated phase angle, magnitude and antenna characteristics, the location of the user (i.e. the navigation receiver) and the location of the navigation satellite, the attitude of the antenna and hence the user or user vehicle can be determined. 1. A process of determining vehicle attitude using one or more navigation satellites , comprising:modulating the sensitivity of an antenna of a single navigation receiver in azimuth;using the navigation receiver to receive a navigation signal from at least one navigation satellite;demodulating the received navigation signal strength by the phase at which the antenna is sweeping and determining a phase angle for the incoming signal;determining the location of the navigation receiver;determining the location of the one navigation satellite; andusing the phase angle, the location of the navigation receiver and the location of the one navigation satellite to determine the attitude of the vehicle.2. The process of claim 1 , further comprising:using the navigation receiver to receive multiple navigation signals from multiple navigation satellites;determining a phase angle for each of the incoming signals;determining the location of each navigation satellite; andusing the phase angles, the location of the navigation receiver and the locations of the navigation satellites to determine the attitude of the vehicle.3. The process of claim 1 , further comprising determining if the received navigation signals are coming from the wrong angle or if the received navigation signals are all coming from the same angle claim 1 , wherein the ...

Integrated, externally-mounted ads-b device

An integrated, externally-mounted Automated Dependent Surveillance-Broadcast (ADS-B) device comprising in one embodiment a 1030 MHz transmitter, a 1030 MHz antenna, a 1090 MHz receiver, a 1090 MHz antenna, a GNSS receiver, at least one GNSS antenna, a 978 MHz transmitter, and a 978 MHz antenna, wherein these components are integrated into a single enclosure, and wherein the GNSS antenna is placed at least partially into a projection extending out from the main enclosure body, such that the GNSS antenna has improved visibility to GNSS signals originating from altitudes above the current altitude of aircraft when the ADS-B device is mounted on the bottom of an aircraft.

Automatic External RF Gain Calibration and Continuous Jamming Measurement

A system and method provide automatic RF path gain calibration independent of RF interference levels to preserve solution trust capabilities. After a system is powered ON, or a new antenna is attached (hot swap), a smart antenna assembly combined with a jammer power estimator within an RF receiver functions to autonomously measure internal gains within the RF path, calibrate the new antenna installation, and thereby measure a level of interference associated with the external environment from that point forward. A controller commands the antenna calibration retrieving antenna details and RF path gain calibration while measuring local jamming at the receiver input. Should the controller determine a level of jamming effectiveness is present, it offers a user a display of the local jamming levels enabling the user accurate theater decision making regarding the accuracy and availability of desirable signal. 1. A system for automatic calibration and jamming measurement , comprising: the switch having 1) an operational position connecting an antenna signal to the interface cable or 2) a bypass position connecting the known noise source to the interface cable;', 'the antenna signal comprised of a desired signal and a jamming signal;, 'a smart antenna assembly including a known noise source, a switch, a gain, a temperature sensor, and an interface cable;'}a Radio Frequency (RF) receiver operatively coupled with the smart antenna assembly via the interface cable, the interface cable having a cable loss; and 'the memory including a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored therein that, in response to execution by the controller, cause the controller to:', 'a jammer power estimator associated with, and operatively coupled with, the RF receiver, the jammer power estimator including a controller operatively coupled with a memory and a known strength test code source;'}sense one ...

MULTIPATH MITIGATION IN A GNSS RADIO RECEIVER

The invention refers to a GNSS receiver, and associated method, for calculating a position from positioning signals transmitted by a plurality of GNSS transmitters, said receiver comprising a first and a second signal acquisition elements () having different polarizations, the receiver being configured to process the signals received on said first signal acquisition element to calculate first pseudo range measurements (), and the signals received on said second signal acquisition element to calculate second pseudo range measurements () and associated quality indicators (), said receiver comprising a calculation circuit () configured to: 1. A GNSS receiver for calculating a position from positioning signals transmitted by a plurality of GNSS transmitters , said receiver comprising a first signal acquisition element having a first polarization and being configured to process the signals received on said first signal acquisition element to calculate first pseudo range measurements , the receiver further comprising a second signal acquisition element having a second polarization different from the first polarization , and being configured to process the signals received on said second signal acquisition element to calculate second pseudo range measurements and associated quality indicators , said receiver comprising a calculation circuit configured to:select at least one of the second pseudo range measurements depending on the quality indicators, and compare said at least one second pseudo range measurement selected with the first pseudo range measurement acquired from a same GNSS transmitter, andselect at least three pseudo range measurements from the first pseudo range measurements based on the comparison results to calculate a position.2. The receiver of claim 1 , wherein the first signal acquisition element is a right hand circularly polarized antenna.3. The receiver of wherein the first and the second signal acquisition elements are separate antenna outputs of a ...

POSITIONING APPARATUS AND POSITIONING METHOD

The present disclosure relates to a positioning apparatus and a positioning method that make it possible to achieve a position measurement with a high degree of accuracy at low operating costs by using a small, lightweight, inexpensive GPS antenna and an IMU. An incident angle at which a carrier enters a GPS antenna is detected in global coordinates, and a posture of the GPS antenna is detected by the IMU in the global coordinates. On the basis of the posture, the incident angle at which the carrier enters the GPS antenna and being represented by the global coordinates is converted into the incident angle in local coordinates using a rotation matrix depending on the posture. On the basis of the incident angle in the local coordinates, an azimuth angle and an elevation angle are specified to obtain a phase difference based on a corresponding PCV, and a PCV correction value is calculated from the phase difference. A carrier phase is corrected using the calculated PCV correction value, and a position is measured. The present disclosure is applicable to a positioning apparatus. 1. A positioning apparatus , comprising:an antenna that receives a carrier from a satellite;a position measurement section that measures a position on the earth on a basis of a carrier phase that is a phase of the received carrier; anda correction value calculator that calculates a correction value used to correct for a variation caused in the carrier phase according to an incident angle at which the carrier enters the antenna, the position measurement section correcting for the variation caused in the carrier phase using the correction value calculated by the correction value calculator, the position measurement section measuring the position on the earth on a basis of the carrier phase resulting from the correction.2. The positioning apparatus according to claim 1 , wherein on a basis of the incident angle at which the carrier enters the antenna and being represented by local coordinates based ...

RADIO FREQUENCY CIRCUIT STRUCTURE FOR IMPLEMENTING FUNCTION OF CONVERTING GNSS SATELLITE SIGNAL INTO BASEBAND SIGNAL

The present invention relates to a radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal. The radio frequency circuit structure comprises a channel dividing function module, a plurality of frequency converting function modules, a plurality of local oscillator signal modules, and a plurality of analog-to-digital convertor modules. The channel dividing function module is used for dividing a satellite signal of the global navigation satellite system received by an antenna into satellite signals in a plurality of channels. Each of the frequency converting function modules is used for performing frequency conversion on the satellite signals in the corresponding channels to form near zero-frequency signals. Each of the local oscillator signal module is used for generating a local oscillator signal and outputting the local oscillator signal to the frequency converting function module. By using the radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal, frequency conversion and follow-up signal processing can be performed on the satellite signals in each frequency band separately, the signal quality insured, a sufficient signal to noise ratio is provided for a baseband processing circuit, thereby providing a wider application range. 1. An radio frequency circuit structure for implementing the function of converting GNSS satellite signal into baseband signal , characterized in that the circuit structure comprises:a channel dividing module, for dividing GNSS satellite signal to a number of different channels of satellite signals according to different carrier frequency;a plurality of frequency converting modules, each of which is corresponding to each channel output from the channel dividing module and each of which is used for converting each signal in corresponding ...

METHOD OF TESTING A PNT CONFIGURATION

Methods and apparatus for generating a test signal for a PNT configuration, and for testing a PNT configuration are disclosed. One such method comprises the steps of using one or more GNSS jamming signal detectors () to detect at least three different types of threat signal, each being an RF-based man-made GNSS jamming signal, and recording, to a database, information for the threat signals; receiving, from the database, information for at least one of the threat signals; generating a corresponding threat signal from the received information; and combining the corresponding threat signal with a PNT signal via a signal combiner to generate the test signal. 1. A method of generating a test signal for testing a PNT configuration , comprising the steps of:using one or more GNSS jamming signal detectors to detect at least three different types of threat signal, each being an RF-based man-made GNSS jamming signal, and recording, to a database, information for the threat signals,receiving, from the database, information for at least one of the threat signals,generating a corresponding threat signal from the received information; andcombining the corresponding threat signal with a PNT signal via a signal combiner to generate the test signal.2. The method of claim 1 , wherein the information for a threat signal received from the database is in the form of information originating from a recorded signal.3. The method of claim 2 , wherein the step of receiving information originating from a recorded signal comprises receiving one or more characteristics of the recorded signal from the database.4. The method of claim 3 , wherein the step of generating a corresponding signal from the information further comprises the steps of:filtering the information based on a characteristic of the recorded signal, andproducing the corresponding signal from the filtered information.5. The method of claim 4 , wherein the characteristic of the recorded signal concerns a parameter defining the ...

APPARATUS AND METHOD FOR REDUCING HARMONIC INTERFERENCE TO GPS SIGNAL RECEPTION

The present invention provides an apparatus and method for reducing harmonic interference to GPS signal reception. The apparatus comprises a RF transceiver module, a GPS signal reception path, and a harmonic distortion predictor. The RF transceiver module generates a first signal to be transmitted. The harmonic distortion predictor is used for establishing an estimated harmonic distortion sample based on the first signal. The GPS signal reception path receives an analog GPS signal, and converts the analog GPS signal into a digital GPS signal. The digital GPS signal subtracts the estimated harmonic distortion sample to obtain an accurate digital GPS signal. Thereby, the harmonic interference may be eliminated from the GPS signal in digital domain by means of digitally form so as to reduce distortion of the GPS signal. 1. An apparatus for reducing harmonic interference to GPS signal reception , comprising:a RF transceiver module, generating a first signal to be transmitted;a GPS signal reception path, comprising a low noise amplifier, a GPS signal processor and an analog-to-digital converter, said low noise amplifier, said GPS signal processor and said analog-to-digital converter are connected in turn, wherein an amplified analog GPS signal is received by said GPS signal processor via said low noise amplifier, said analog-to-digital converter converting said analog GPS signal into a digital GPS signal; anda harmonic distortion predictor, connected to said RF transceiver module and said GPS signal reception path, configured to establish an estimated harmonic distortion sample by the use of said first signal digitally, said estimated harmonic distortion sample being subtracted from said digital GPS signal, such that the harmonic interference is eliminated from said digital GPS signal in digital domain digitally so as to reduce distortion of said digital GPS signal.2. The apparatus according to claim 1 , wherein said digital GPS signal is a GPS signal distorted due to ...

DIGITAL BEAM-FORMING FOR SIMULTANEOUSLY MITIGATING WEAK AND STRONG INTERFERENCE IN A NAVIGATION SYSTEM

An adaptive cascaded electronic protection processing system for global navigation satellite system (GNSS) threat mitigation is provided. The system includes a precorrelation characterization component configured to provide at least one parameter characterizing a plurality of received signals. A correlator is configured to provide a plurality of correlation results, each representing one of the plurality of received signals. A spatial weight contribution component is configured to determine an optimal set of digital beam-forming weights via an optimization process according to the at least one parameter. A postcorrelation characterization component is configured to determine at least one constraint on the optimization process according to the plurality of correlation results. 1. A receiver comprising:a plurality of antennas to receive a plurality of signals; and a filter bank that provides a temporal cancelation of emitters, a set of weights for the filter bank being determined via an adaptive process to produce the set of weights and at least one parameter characterizing the plurality of received signals;', 'a correlator that provides a plurality of correlation results, each representing one of the plurality of received signals; and', 'a digital beamformer, comprising a plurality of multipliers each configured to multiply a correlation result by an associated weight value from a set of beamforming weights and a summation component that sums the weighted correlation results to provide a spatially filtered correlation result, the set of beamforming weights being determined via an optimization process performed on the at least one parameter characterizing the plurality of received signals with at least one constraint on the optimization process being determined from the plurality of correlation results., 'an adaptive electronic protection system for a global navigation satellite system (GNSS) comprising2. The receiver of claim 1 , wherein the at least one constraint ...

Methods and Systems for Detecting Potential Interference with a Tracking Device Associated with a Vehicle

An exemplary method includes a monitoring system identifying a time period during which a vehicle equipped with a tracking device travels at least a threshold distance, determining that the tracking device fails to acquire a desired signal for a predetermined amount of time during the time period, and, in response to determining that the tracking device fails to acquire the desired signal, determining that the tracking device is potentially being interfered with during the time period by a signal jamming device. 1. A method comprising:identifying, by a monitoring system, a time period during which a vehicle equipped with a tracking device travels at least a threshold distance;determining, by the monitoring system, that the tracking device fails to acquire a desired signal for a predetermined amount of time during the time period; andin response to determining that the tracking device fails to acquire the desired signal, determining, by the monitoring system, that the tracking device is potentially being interfered with during the time period by a signal jamming device.2. The method of claim 1 , wherein the signal is a global positioning system (“GPS”) signal and the signal jamming device is a GPS signal jamming device.3. The method of claim 2 , further comprising:determining, by the monitoring system, that the tracking device acquires a wireless network signal during the time period;wherein the determining that the tracking device is potentially being interfered with during the time period by the signal jamming device is further based on the determining that the tracking device acquires the wireless network signal during the time period.4. The method of claim 1 , wherein the signal is a wireless network signal and the signal jamming device is a wireless network signal jamming device.5. The method of claim 4 , further comprising:determining, by the monitoring system, that the tracking device acquires a global positioning system (“GPS”) signal during the time period; ...

FAST FIX USING PERFECT REFERENCE IN A SATELLITE-BASED POSITIONING SYSTEM

A satellite-based positioning system (SPS) signal processing technique re-samples a received series of PRN sequences from an SPS satellite to align them with a nominal sampling rate for a corresponding series of perfect reference PRN replica sequences. 1. A satellite-based positioning system (SPS) receiver , comprising:an RF front end configured to receive a series of PRN sequences from an SPS satellite responsive to an assertion of a wakeup signal, the received series of PRN sequences having a phase modulation responsive to a navigation bit overlay;an analog-to-digital converter (ADC) configured to sample the series of received PRN sequences across a sampling window to provide original time samples responsive to an SPS clock having an SPS sampling rate;a perfect reference generator configured to generate perfect reference samples for a plurality of candidate perfect reference sampling periods within a perfect reference search window comprising a series of perfect reference PRN sequences, wherein the perfect reference PRN sequences have a conjugate phase modulation that is the complex conjugate of the phase modulation for the navigation bit overlay;a re-sampler configured to re-sample the original time samples according to a first effective sampling rate different from the SPS sampling rate to provide first re-sampled time samples; anda cross-correlator configured to coherently cross-correlate the first re-sampled time samples with the perfect reference samples for a selected one of the candidate preference reference sampling periods to provide a first cross-correlation sum;and a detection module configured to assert the wakeup signal at the start of the sampling window and to de-assert the wakeup signal at the end of the sampling window, wherein the detection module is further configured to adjust the selection of the candidate perfect reference sampling period to search the plurality of candidate perfect reference sampling periods to detect a first peak value in ...

ANTENNA APPARATUS AND VEHICLE

A vehicle may include a GPS receiver, a wireless communication apparatus, and the antenna, wherein the antenna may have a first conductive plate in which a slot is formed, a second conductive plate disposed in parallel to the first conductive plate, a dielectric member located between the first conductive plate and the second conductive plate, a plurality of via holes penetrating the first and second conductive plates and the dielectric member, a first feed member configured to transmit a first signal received through the first and the second conductive plates to the GPS receiver, and a second feed member configured to radiate a second signal supplied from the wireless communication apparatus to an inside of a resonance cavity formed by the plurality of via holes. 1. An antenna apparatus comprising:a first conductive plate in which a slot is formed;a second conductive plate disposed in parallel to the first conductive plate;a dielectric member located between the first conductive plate and the second conductive plate;a plurality of via holes penetrating the first and second conductive plates and the dielectric member;a first feed member configured to supply a first signal to the first conductive plate; anda second feed member configured to radiate a second signal to an internal to a resonance cavity formed by the plurality of via holes.2. The antenna apparatus according to claim 1 , wherein the slot is formed in a center area of the first conductive plate claim 1 , and the plurality of via holes are formed in a center area of the dielectric member.3. The antenna apparatus according to claim 1 , wherein the plurality of via holes are disposed in a shape of a rectangle claim 1 , and the resonance cavity formed by the plurality of via holes has a shape of a rectangular parallelepiped.4. The antenna apparatus according to claim 1 , wherein the slot is formed in an inside of a predetermined area defined by the plurality of via holes on the first conductive plate.5. The ...

METHOD FOR FORMATION OF A SIGNALS ARRAY FROM A RECEIVER OF SIGNALS FROM A SATELLITE NAVIGATION SYSTEM IN ORDER TO IMPROVE ITS RESISTANCE TO SCRAMBLING OR INTERFERENCE

Method for formation of a signals array from a receiver () of signals from a satellite navigation system in order to improve the resistance to scrambling or interference, the receiver () being equipped with an antenna () having several controlled reception pattern sensors, comprising a step consisting in determining the attitude of the antenna in a TGL reference frame centred on the receiver, by iterative determination of the attitude angles of the antenna yielding the maximum of the sum of the energies of the weighted sums of the signals received by the sensors at the output of the correlators of the processing channel respectively associated with the satellites, the weighting coefficients of the weighted sums being calculated from the attitude angles considered at each iteration and from the known positions of the satellites in the TGL reference frame. 1202021. Method for formation of a signals array from a receiver () of signals from a satellite navigation system in order to improve the resistance to scrambling or interference , the receiver () being equipped with an antenna () having several controlled reception pattern sensors , comprising a step consisting in determining the attitude of the antenna in a TGL reference frame centred on the receiver , by iterative determination of the attitude angles of the antenna yielding the maximum of the sum of the energies of the weighted sums of the signals received by the sensors at the output of the correlators of the processing channel respectively associated with the satellites , the weighting coefficients of the weighted sums being calculated from the attitude angles considered at each iteration and from the known positions of the satellites in the TGL reference frame.2. Method according to claim 1 , in which parameter discriminators are used that are representative of the directions of arrival of the satellite signals in a reference frame linked to the antenna.3. Method according to claim 2 , in which a method is ...

Electronic apparatus

An electronic apparatus comprises a first receiving antenna that receives a signal from a satellite in a satellite positioning system, a multi-antenna including a second receiving antenna, and a first feeding point shared by the first and second receiving antennas. The first receiving antenna is located nearer to a corner of the electronic apparatus than the second receiving antenna is.

INTERFERENCE MITIGATION FOR A RECEIVER

A method for mitigating interference in a receiver, where the received signal is transmitted in a fashion having equivalent information content in at least two distinct bands. The method compares mean power per unit bandwidth in suitably normalised sidebands and sets a rejection threshold based upon the measured levels. Bands above the threshold may be rejected from further processing. The bands may include sidebands produced by a modulation process that produces sidebands having the same informational content. The threshold may be set relative to the band having the lowest mean power per unit bandwidth or according to some other function of the bands. Also extends to a signal processor in a receiver, and a receiver. The primary focus of the application is toward the Galileo Public Regulated Service (PRS) Satellite navigation signal. 1. A method of processing signals in a receiver , wherein the signal has been transmitted having equivalent information content present in at least two distinct spectral bands , the method comprising the steps of:a) measuring the power in each of at least two of the spectral bands;b) normalising the power measurements of each of the at least two spectral bands, the normalisation taking into account at least one of i) gain differences in the receiver signal chain, ii) differences caused by frequency propagation effects upon the at least two spectral bands, but not taking into account differences caused by interference signals;c) generating a threshold based upon a function of the mean power per unit bandwidth in each spectral bandd) choosing at least one of the spectral bands whose mean power per unit bandwidth is/are below the threshold value;e) processing the chosen spectral bands to recover the information content therein.2. A method as claimed in wherein claim 1 , at step a) claim 1 , at least two of the bands measured are chosen from bands derived from a modulation process that inherently produces at least two bands having the same ...

SATELLITE POSITIONING SYSTEM RECEIVER CAPABLE OF DETECTING FAILURE IN RF RECEIVER UNIT INCLUDING RECEIVING ANTENNA

A test signal generator generates a first test signal. A test signal transmitter transmits the first test signal. An RF receiver unit receives the first test signal and a first satellite signal through a receiving antenna, and generates a second test signal and a second satellite signal, respectively. Each of first and second demodulators calculates a correlation value between the second satellite signal and the spreading code to acquire a satellite. A first failure detector unit compares a signal intensity of the second test signal with a threshold to generate a first failure detection signal. A second failure detector compares the satellites acquired by the first and second demodulator to generate a second failure detection signal. A state determiner determines whether and where a failure exists, using the first and second failure detection signals. 1: A satellite positioning system receiver comprising:a test signal generator that generates a first test signal having a frequency in an RF frequency band;a test signal transmitter that transmits the first test signal;an RF receiver that receives the first test signal and a first satellite signal transmitted from a satellite, through a receiving antenna, and generates a second test signal and a second satellite signal, respectively, each of the second test signal and the second satellite signal having a frequency in a baseband frequency band;a first demodulator that calculates a first correlation value between the second satellite signal and a spreading code allocated per satellite, to acquire a satellite transmitting the first satellite signal;a second demodulator that calculates a second correlation value between the second satellite signal and the spreading code, to acquire the satellite transmitting the first satellite signal;a positioning calculator that calculates an own position using the first correlation value;a first failure detector that compares signal intensity of the second test signal with a ...

SYSTEMS AND METHODS TO MONITOR FOR FALSE ALARMS FROM IONOSPHERE GRADIENT MONITORS

Systems and methods to monitor for false alarms from ionosphere gradient monitors are provided. In one embodiment, a method for mitigating false gradient alarms in a satellite navigation Ground Based Augmentation System (GBAS) ground station comprising a plurality of satellite navigation system reference receivers comprises: generating an alarm signal with an ionosphere gradient monitor (IGM) at the GBAS ground station; determining whether the alarm signal is a false alarm based on data derived from carrier phase measurements received from the plurality of satellite navigation system reference receivers; and blocking the alarm signal for at least a first duration of time based on the determining. 1. A system for mitigating ionosphere gradient monitor (IGM) false alarms , the system comprising:at least three global navigation satellite reference receivers that output carrier phase measurements;a processing module coupled to the at least three global navigation satellite reference receivers, the processing module comprising a gradient estimator module that outputs an IGM alarm via a switch when an excessive delay gradient is detected based on the carrier phase measurements; anda parity evaluator coupled to the switch, wherein the parity evaluator inputs carrier phase double difference data calculated from the carrier phase measurements and determines a parity error from the carrier phase double difference data, wherein when the parity error exceeds a threshold the parity evaluator operates the switch to block the IGM alarm.2. The system of claim 1 , the processing module further comprising:a satellite difference module that inputs the carrier phase measurements; anda double differencing module coupled to the satellite difference module, where the double differencing module calculates the carrier phase double difference data.3. The system of claim 2 , wherein the processing module further comprises a memory;wherein the carrier phase double difference data is stored in ...

Tones processing system in a global navigation satellite system receiver

A tones processing system including an interference tone determination module (ITDM), an interference tone tracker module (ITTM) and an interference tone removal module (ITRM) is provided. The ITDM sequentially searches for one or more continuous wave interference (CWI) tones in N samples of intermediate frequency (IF) data within a programmable signal frequency band. The ITTM tracks the detected CWI tones. The ITRM removes the tracked CWI tones from the N samples of IF data using one or more interference tone removal units (ITRUs). Each of the ITRUs includes a second signal generator, a second mixer, a tone filter for suppressing the tracked CWI tones, and a quantizer for reducing the number of processing bits in a tone suppressed output signal. The ITRM performs frequency shift compensation and phase rotation compensation with reduced logic area and power consumption in the global navigation satellite system. receiver.

TONES PROCESSING SYSTEM IN A GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER

A tones processing system including an interference tone determination module (ITDM), an interference tone tracker module (ITTM) and an interference tone removal module (ITRM) is provided. The ITDM sequentially searches for one or more continuous wave interference (CWI) tones in N samples of intermediate frequency (IF) data within a programmable signal frequency band. The ITM tracks the detected CWI tones. The ITRM removes the tracked CWI tones from the N samples of IF data using one or more interference tone removal units (ITRUs). Each of the ITRUs includes a second signal generator, a second mixer, a tone filter for suppressing the tracked CWI tones, and a quantizer for reducing the number of processing bits in a tone suppressed output signal. The TRM performs frequency shift compensation and phase rotation compensation with reduced logic area and power consumption in the global navigation satellite system, receiver. 1103102103. A tones processing system () integrated in a global navigation satellite system receiver () for detecting and removing one or more continuous wave interference tones from N samples of intermediate frequency data with reduced logic area and power consumption , said tones processing system () comprising:{'b': 104', '104, 'claim-text': [{'b': 112', '111, 'a first mixer () for receiving and mixing said N samples of said intermediate frequency data with a first local carrier signal of a programmable carrier frequency generated by a first signal generator () for a programmable sweep rate associated with said each of said M search iterations to generate an intermediate frequency shifted digital signal comprising intermediate frequency shifted components within said programmable signal frequency band, corresponding to said N samples of said intermediate frequency data;'}, {'b': 113', '112, 'an integrate and dump filter () operably connected to said first mixer () for generating accumulated frequency components corresponding to said N samples of ...

Tones processing system in a global navigation satellite system receiver

A tones processing system including an interference tone determination module (ITDM), an interference tone tracker module (ITTM) and an interference tone removal module (ITRM) is provided. The ITDM sequentially searches for one or more continuous wave interference (CWI) tones in N samples of intermediate frequency (IF) data within a programmable signal frequency band. The ITTM tracks the detected CWI tones. The ITRM removes the tracked CWI tones from the N samples of IF data using one or more interference tone removal units (ITRUs). Each of the ITRUs includes a second signal generator, a second mixer, a tone filter for suppressing the tracked CWI tones, and a quantizer for reducing the number of processing bits in a tone suppressed output signal. The ITRM performs frequency shift compensation and phase rotation compensation with reduced logic area and power consumption in the global navigation satellite system, receiver.

BEZEL ANTENNA SYSTEM

A wrist-worn electronic device comprises a housing, a bezel, a first frequency band antenna, a second frequency band antenna, and a location determining element. The housing includes a bottom wall contacting a wearer's wrist and a side wall coupled to the bottom wall. The bezel is formed at least partially from electrically conductive material and positioned along an upper edge of the side wall. The first frequency band antenna receives a first global navigation satellite system (GNSS) location signal at a first frequency and includes a radiating element formed by a first portion of a circumference of the bezel. The second frequency band antenna receives a second GNSS location signal at a second frequency and includes a radiating element formed by a second portion of the circumference of the bezel. The location determining element determines a current geolocation of the wrist-worn electronic device based on the first and second GNSS location signals. 1. A wrist-worn electronic device comprising:a housing including a bottom wall configured to contact a wearer's wrist and a side wall coupled to the bottom wall;an annular bezel formed at least partially from electrically conductive material and positioned along an upper edge of the side wall;a first frequency band antenna configured to receive a first global navigation satellite system (GNSS) location signal at a first frequency, the first frequency band antenna including a radiating element formed by a first portion of a circumference of the bezel;a second frequency band antenna configured to receive a second GNSS location signal at a second frequency, the second frequency band antenna including a radiating element formed by a second portion of the circumference of the bezel; and receive the first and second GNSS location signals, and', 'determine a current geolocation of the wrist-worn electronic device based on the first and second GNSS location signals., 'a location determining element electrically coupled with the ...

Slot mode antennas

The invention concerns an assembly for an antenna operating in a slot mode. It is also directed to an electronic wristwatch-like device comprising such antennas. The antenna assembly comprises at least one circuit board of an electronic device, a conductive body arranged at a distance from said at least one circuit board and defining a slot between them, at least one feed element for coupling an electromagnetic signal between said conductive body and said circuit board. A length of the slot is defined between two points at which said conductive body is connected to a ground plane of said at least one circuit board. 1. An assembly for an antenna operating in a slot mode , wherein the assembly comprises at least one printed circuit board of an electronic device , a conductive body arranged at a distance from said at least one printed circuit board and defining a slot mode antenna between them , said antenna having two end connection points at which said conductive body is connected to a ground plane of said at least one circuit board , and between said connection points at the edge of one of said at least one printed circuit board at least one feed element for coupling an electromagnetic signal between said slot mode antenna and said circuit board , and wherein the effective width and/or length of the slot mode antenna is at least partially defined by a conductive rim structure running at least in part along the perimeter of said one printed circuit board and attached to the edge of said board.2. The assembly according to claim 1 , wherein said circuit board is arranged in a plane parallel to and at least partly aligned with said conductive body claim 1 , and has at least along a part of its periphery a conductive layer at said ground plane.3. The assembly according to claim 1 , further comprising an element having a connection point that connects said conductive body to a ground plane of said circuit board claim 1 , said connection point being located at a first end ...

DISTORTIONLESS MEAN PHASE ANTIJAM NULLING OF GPS SIGNALS

System and method for mean phase compensation of code and carrier phase distortions induced by Space Time Adaptive Processing (STAP) filters used for removing interferences from received GPS signals. The phase distortion is mitigated (without the use of beamforming) using a single STAP filter for processing the GPS satellite channels in which appropriate bundling of constraints is applied to the filter weights. The complete solution can be contained in the antenna electronics with no required changes to the legacy GPS receiver. 1. A non-beamforming system for nulling interference signals received with GPS signals at an antenna array without carrier and code mean phase distortion of said GPS signals comprising:an antenna array having a plurality of antenna array elements for receiving GPS signals from a plurality of satellites;each antenna array element having a signal channel that outputs the GPS signals and interference signals received at said each antenna array element; anda single filter configured to receive the output signals from the plurality of antenna array element signal channels, null the interference signals, and output carrier and code mean phase distortionless GPS signals along a common signal path.2. The system of claim 1 , wherein the antenna array elements comprise different modes of the received GPS signals.3. The system of claim 1 , wherein the number of satellites for which signals are processed does not exceed the number of antenna array elements.4. The system of claim 1 , wherein the filter is a Space Time Adaptive Processing (STAP) filter.5. The system of claim 4 , wherein the nulling of interference signals results from applying constraints to the filter weights.6. The system of claim 5 , wherein the constraints are bundled.7. The system of claim 6 , wherein a regularization procedure is used for determining the constrained filter weight vector.8. The system of claim 7 , wherein the regularization procedure includes a diagonal scaling matrix ...

Detection of spoofed satellite signals

A technology is provided for detecting spoofed satellite signals. An aircraft may be equipped with a top antenna that is adapted to receive satellite signals and a bottom antenna that is adapted to receive terrestrial signals. A signal may be received on the top antenna and the bottom antenna. Relative signal strength between the top antenna and the bottom antenna may be used to differentiate satellite sourced signals from terrestrial sourced signals.

SPOOFING DETECTION AND ANTI-JAM MITIGATION FOR GPS ANTENNAS

There is provided an apparatus comprising an antenna () configured to receive a signal from a global navigation satellite system, wherein the antenna includes a first feed and a second feed; a hybrid coupler () including a first hybrid input, a second hybrid input, a first hybrid output, a second hybrid output, and wherein the first hybrid output is shifted in phase by 90 degrees relative to the second hybrid output; a variable phase shifter () including a shifter input and a shifter output, hybrid output; and a combiner () including a first combiner input, a second combiner input, and a combiner output, wherein the first combiner input is coupled to the shifter output, and the second combiner input is coupled to the second hybrid output, and wherein the combiner output is provided to detection circuitry (). 1. An apparatus comprising:an antenna configured to receive a signal from a global navigation satellite system, wherein the antenna includes a first feed and a second feed;a hybrid coupler including a first hybrid input, a second hybrid input, a first hybrid output, a second hybrid output, wherein the first hybrid input is coupled to the first feed, the second hybrid input is coupled to the second feed, and wherein the first hybrid output is shifted in phase by 90 degrees relative to the second hybrid output;a variable phase shifter including a shifter input and a shifter output, wherein the shifter input is coupled to the first hybrid output, wherein variable phase shifter is configured to induce an additional phase shift; anda combiner including a first combiner input, a second combiner input, and a combiner output, wherein the first combiner input is coupled to the shifter output, and the second combiner input is coupled to the second hybrid output, and wherein the combiner output represents a combined right hand circularly polarized signal and left hand circularly polarized signal, wherein the combiner output is provided to detection circuitry.2. The ...