СПОСОБ РАБОТЫ РАДИОЛОКАЦИОННОЙ СТАНЦИИ С ПОВЫШЕННЫМИ ДОППЛЕРОВСКИМИ ХАРАКТЕРИСТИКАМИ

FIELD: radio engineering, communication. SUBSTANCE: each pulse in this sequence has a specific constant phase corresponding to a quadratic phase sequence, and this phase is applicable to each pulse in some first modulation sense. This method includes the operation of modulating a reflected energy signal received from one or more objects reflecting a transmitted repeating sequence of N pulses of constant frequency in some second modulation sense, counterposed to said first modulation sense. Method includes the operation of producing N unique and discrete frequency transfers of received reflected energy signal from modulated received reflected energy signals as a function of range r to reflective objects whose magnitude is a multiple of 1/NT Hz, and these frequency transfers can store the spectrum of received reflected energy signal, forming in combination a complex frequency spectrum of signal. EFFECT: increasing the reliability of received signals by storing the frequency band of reflected signal. 28 cl, 24 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 628 566 C1 (51) МПК G01S 7/292 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016147982, 26.05.2015 (24) Дата начала отсчета срока действия патента: 26.05.2015 (72) Автор(ы): ЛИ Роберт У. (US) (73) Патентообладатель(и): ЛИ Роберт У. (US) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: EP 1314997 A1, 28.05.2003. RU Приоритет(ы): (30) Конвенционный приоритет: 2239845 C2, 10.11.2004. RU 2194288 C2, 10.12.2002. US 5422646 A, 06.06.1995. US 5870054 A, 09.02.1999. 29.05.2014 US 14/290,708 2 6 2 8 5 6 6 (45) Опубликовано: 21.08.2017 Бюл. № 24 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.12.2016 (86) Заявка PCT: US 2015/032478 (26.05.2015) (87) Публикация заявки PCT: 2 6 2 8 5 6 6 Адрес для переписки: 101000, Москва, Центр а/я 732, "Агентство ТРИА РОБИТ", Вашиной Г.М. (54) СПОСОБ РАБОТЫ РАДИОЛОКАЦИОННОЙ СТАНЦИИ ...

НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА

Обзорная радиолокационная станция содержит в комбинации одну неподвижную антенну 10 для обеспечения электронного сканирования контролируемого пространства по азимуту в горизонтальной плоскости, источник излучения GEN и средства приема/передачи сверхвысокочастотного сигнала НFА, НFВ с циркулятором 20, канал передачи VЕ, канал приема VR и средства для подразделения упомянутого выше канала приема на сигнал суммы VRI и по меньшей мере один сигнал разности VR2. Первый и второй приемные элементы с изменением частоты RECI и RЕС2 принимают соответственно сигнал суммы и сигнал разности и выдают свои выходные сигналы, закодированные в цифровой форме. Средства обработки 40 обрабатывают цифровые сигналы, поступающие из первого и второго приемных элементов, для радиолокационного выявления объектов или целей в контролируемой зоне.

Hindernis-Unterscheidungssystem für Fahrzeuge

Radar system has modulator that is provided for performing ramp or saw tooth frequency modulation of carrier waveform

The radar system has a primary code generator (1) that is provided for modulating a carrier wave with a code of a sequence of numbers. A secondary code generator (2) is provided for demodulating the radar information with the code at varying delays with respect to that code contained in the transmitted waveform. A modulator (3) is provided for performing ramp or saw tooth frequency modulation of the carrier waveform. The primary code generator is synchronized with secondary code generator.

PULSKOMPRESSION-RADARSYSTEM FÜR KRAFTFAHRZEUGE UND SONSTIGE KOMMERZIELLE ANWENDUNGEN

Regenerierung von In-Phase- und Quadratursignalen

Radar systems

Radio frequency distance determination

A method of determining a distance between a radio frequency device 2 and a target 18 is provided in which the radio frequency device receives a radio frequency signal from the target. The method further comprises determining a time domain channel response from the received radio frequency signal, determining an amplitude of a largest peak in the time domain channel response, determining an amplitude of a second, earlier, peak in the time domain channel response, comparing the second peak amplitude to a threshold based on the largest peak amplitude, identifying the largest peak as a shortest path peak if the second peak amplitude is less than the threshold, identifying the second peak as a shortest path peak if the second peak amplitude is greater than the threshold, and calculating the distance between the radio frequency device and the target based on a time corresponding to the shortest path peak.

RADAR SYSTEMS

IMPROVEMENTS IN AND RELATING TO RADAR RECEIVERS

A radar receiver (200) comprises an analogue receiver (230) for receiving a radar echo signal and a digital receiver (240). The digital receiver (240) includes an analogue-to-digital converter (300A-D) arranged to receive and sample an IF analogue signal from the analogue receiver (230). The sampling is undersampling according to the Nyquist criterion, so that a plurality of IF digital signals are produced, in different Nyquist zones, including one or more aliased IF digital signal. The digital receiver (240) is arranged to select an IF digital signal from the one or more aliased digital signals.

IMPROVEMENTS IN AND RELATING TO RADAR RECEIVERS

A radar receiver (200) comprises an analogue receiver (230) for receiving a radar echo signal and a digital receiver (240). The digital receiver (240) includes an analogue-to-digital converter (300A-D) arranged to receive and sample an IF analogue signal from the analogue receiver (230). The sampling is undersampling according to the Nyquist criterion, so that a plurality of IF digital signals are produced, in different Nyquist zones, including one or more aliased IF digital signal. The digital receiver (240) is arranged to select an IF digital signal from the one or more aliased digital signals.

Pulse radar arrangement

A pulse radar system has a high-frequency source, which supplies a continuous high-frequency signal and is connected on the one side to a transmission-side pulse modulator and on the other side to at least one mixer in at least one receive path. A pulse modulator is connected upstream of the mixer with regard to its connection to a receiving antenna. The mixer evaluates a radar pulse reflected by an object together with the signal of the high-frequency source. This system does not require a ZO switch and is insensitive to interference.

System and method for reducing false positive detection between a human and a moving implement in a power tool

A method for detection of false positive condition that an object is in contact with an implement in a power tool includes sampling an electrical signal received from the implement, identifying in-phase and a quadrature components of the sampled electrical signal, identifying a magnitude of each of the samples with reference to the in-phase component and the quadrature component for the samples, detecting an object approaching the implement with reference to the plurality of samples, identifying a signal-to-noise ratio for the samples, and identifying a false positive condition for the detected object with reference to the identified signal-to-noise ratio for the identified samples.

Radar

A method of improving the performance of a radar system in the presence of intermittent periods of significant interference comprising the steps of digitising 10 and storing 12 the I and Q information which is received by the radar during predetermined analysis periods related to the target processing interval in each of its processed range cells, performing a separate statistical analysis, e.g. an amplitude histogram, on the information stored in each range cell to determine which such cells contain corrupted or unusable information, forming from the results a binary template 18 corresponding to pattern of corrupted and usable cells, and utilising the template to determine which of the stored cell information is to be passed 20 for subsequent processing in a radar detector processor.

A radar system for detecting profiles of objects, particularly in a vicinity of a machine work tool

A radar system including a transmitter 310 and receiver 320 is disclosed for detecting profiles of objects, particularly in a vicinity of a machine work tool. The system includes a master clock signal generator 120 to generate a master signal having a frequency f. A sampling frequency generator 130 uses the master clock signal to generate a sampling frequency output signal. A transmission signal generator 210 configured to use the master clock signal to generate a transmission signal. The radar system uses a direct digital synthesiser 220 to produce a synthesiser output signal. An up-converter 230 comprising a quadrature mixer, single-side mixer or complex mixer receives the transmission signal and mixes it with the synthesiser output to produce an up-converter output. It further uses a down-converter 250 which mixes the up-converter output with a received signal to produce a down-converter output. A digitiser 270 receives and samples the down-converter output to produce a digitiser output ...

Continuous wave radar altimeter

Doppler radar

Continous wave radar altimeter

IMPROVEMENTS REGARDING THE SPEED EXTRACTION

Coherent radar

Pulse compression coherent radar provided with a digital generator (1) of pseudo- random waveforms in the form of sequences of first numerical pairs in-phase and quadrature (I, Q); a mass memory (2) adapted to record on it at least a selection of said sequences of first numerical pairs (I, Q) that represent, and permit to generate, analog signals falling in the range of working frequencies of the radar and suitable for transmission by the radar itself; a coherent transceiver comprising a coherent modulator (3), adapted to receive said at least one selection of the sequences of the first numerical pairs (I, Q), read from the mass memory (2), and to generate a respective analog signals; a power amplifier (4) to amplify said analog signals; at least one antenna (6) to transmit said analog signals and receive analog signals reflected from one or more radar target; a coherent demodulator (7) adapted to receive said analog signals reflected and to generate digital signals, representative of said analog signals reflected, in the form of sequences of second numerical pairs (I', Q' ); a frequency synthesizer (8) adapted to generate reference frequencies (f

IN-PHASE AND QUADRATURE SIGNAL REGENERATION

The present invention relates to the regeneration of in-phase (I) and quadrature (Q) signals in electronic devices commonly used in communication, radar and instrumentation electronics. The original signal of interest comprises two orthogonal components that are mathematically modelled using complex values, which are then decomposed into a real (I) and an imaginary (Q) component. These two components are orthogonal to each other and represent fully the signal of interest. The present method adaptively compensates for the gain and phase imbalances and DC offsets in I and Q signal regeneration. First, 3 phase shifted versions of the received signal, either down-converted to some intermediate frequency (IF) or at baseband, are digitised. Although the optimum phase shift between each version is 360°/3, any phase shift different than 0° and 180° is acceptable and no a priori knowledge of the phase shifts is required. Based on these 3 digital signals representing 3 linear combinations of the I&Q signal components, the regeneration algorithm projects these signals into a 3-dimensional space composed of the I signal subspace, the Q signal subspace, and another subspace, referred to as the noise subspace. The projection is performed using an eigen-decomposition method where the eigenvectors associated with the I and Q signal subspaces provide linear combination coefficients for regenerating the I&Q signals. Compensation for DC offsets is performed by removing an average DC offset on the phase and gain corrected I&Q signals. The regenerated digital I and Q signals are then converted back to analog signals, when required.

Verfahren und Vorrichtung zum Bereitstellen eines Reflexionssignals

Object distance measurement procedure for car pre-crash sensors, uses recursive median filtering and no signal threshold interference value calculation

An object distance measurement procedure processes transmitted and received reflected signals using a windowed digitized received signal with recursive median filtering and no signal interference threshold value calculation used to produce a CFAR (Constant False Alarm Rate) in pre crash sensors. Includes INDEPENDENT CLAIMs for equipment using the procedure.

Radar systems

Radar ranging system

GROUND MONITORING RADAR SYSTEM, IN PARTICULAR FOR AIRPORT

PROCEDURE FOR THE SPACER REGULATION BETWEEN A BASIS STATION AND A MOBILE OBJECT, AS WELL AS BASIS STATION AND IDENTIFICATION SYSTEM FOR A SUCH PROCEDURE

PROCEDURE FOR THE CLASSIFICATION OF A TRANSPONDER AND/OR OF A TRANSPONDER OF DELIVERED SIGNALS AND READER

Improved signal detection and characterization

A method and system for detecting and characterizing an input signal receive a signal having an in-phase (I) component and a quadrature -phase (Q) component. A first IQ sample of the signal is acquired at a first point in time, and a second IQ sample of the signal is acquired at a second point in time, Using one or more processors, a delayed complex conjugate multiply (DCM) is applied to the first IQ sample of the signal and the second IQ sample of the signal to produce a constant product having an in-phase ( ...

METHODS AND APPARATUS FOR BLIND RANGE RECOVERY ON PULSE COMPRESSION RADARS

Methods, systems and non-transitory computer readable mediums for processing radar signals to recover signals inside a blind region are disclosed. A transmission signal is transmitted from a radar system. The radar system receives a return signal. The return signal includes a first portion of the transmission signal leaked during transmission and a second portion reflected from an object within the blind region. The return signal is partially decoded by zeroing out the first portion of the transmission signal to form a modified return signal. Pulse compression is performed over the modified return signal to form a compressed return signal. The compressed return signal is processed to calculate moment products. The moment products are calibrated with a calibration factor, wherein the calibration factor is multiplied against only calculated moment products of range gates which have been partially decoded.

IN-PHASE AND QUADRATURE SIGNAL REGENERATION

The present invention relates to the regeneration of in-phase (I) and quadrature (Q) signals in electronic devices commonly used in communication, radar and instrumentation electronics. The original signal of interest comprises two orthogonal components that are mathematically modelled using complex values, which are then decomposed into a real (I) and an imaginary (Q) component. These two components are orthogonal to each othe r and represent fully the signal of interest. The present method adaptively compensates for the gain and phase imbalances and DC offsets in I and Q signal regeneration. First, 3 phase shifted versions of the received signal, either down-converted to some intermediate frequency (IF) o r at baseband, are digitised. Although the optimum phase shift between each version is 360.degree./3, any phase shift different than 0.degree. and 180.degree. is acceptable and no a priori knowledge of the phase shifts is required. Based on these 3 digital signals representing 3 linear ...

METHOD OF AND APPARATUS FOR IMPROVING THE SIGNAL-TO-NOISE-RATIO (S/N) IN THE GATE CHANNEL OF PULSE-DOPPLER RADAR SETS

The invention relates to a method and a device for improving the signal-to-noise ratio (S/N) in the audio gate channel (2) of pulsed Doppler radar units, wherein the audio gate channel (2) branches off from a digitized input signal of a video channel (I or Q) of a detection channel (1) of the radar unit. The inventi on further provides that the branched off signal of the audio gate channel (2) is combined with a modified signal of the detection channel (1) adapted to provide signal processing gain.

ИМПУЛЬСНЫЙ СВЕРХШИРОКОПОЛОСНЫЙ ДАТЧИК

FIELD: medical diagnostics devices. SUBSTANCE: pulse wideband detector can be used for in radiolocation aids of diagnostics of patients' breathing parameters. Breathing control detector has control unit to form time delay; probing signal forming unit, which has coherent radio pulse oscillator; transmitting and receiving aerials; probing signal transmitter path; reflected signal receiver path with two reflected signal processing quadrature channels; processor unit providing restoration of law of motion of tested object; and data processing and presentation unit. Any quadrature channel for processing reflected signals has signal mixer, which has input connected with receiving aerial and analog-to-digital converter. Detector also has phase-shifting chain, which has input connected with probing signal forming path and output connected with second input of signal mixer of second quadrature channel for processing of reflected signal. First input of processor unit is connected with output of analog-to-digital converter of first quadrature channel for processing of reflected signal. Second input of processor unit is connected with output of analog-to-digital converter of second quadrature channel for processing of reflected signal. Output of processor unit is connected with data processing and presentation unit. Detector has also controlled electron switch. Input of switch is connected with output of probing signal forming path. First output of switch is connected with probing signal receiver's path and it second inputs connected with second input of signal mixer of first quadrature channel for processing reflected signal and with input of phase-shifting chain. EFFECT: improved phase sensitivity of detector; ability of controlling breathing of moving patients. 7 cl, 26 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 321 341 (13) C1 (51) ÌÏÊ A61B 5/08 (2006.01) G01S 13/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ...

СПОСОБ ИМПУЛЬСНО-ДОПЛЕРОВСКОЙ РАДИОЛОКАЦИИ И УСТРОЙСТВО С АВТОДИННЫМ ПРИЁМОПЕРЕДАТЧИКОМ ДЛЯ ЕГО РЕАЛИЗАЦИИ

Изобретение относится к системам ближней радиолокации (СБРЛ) с определением дальности путем измерения времени задержки отраженного от объекта локации радиоимпульса и относительной скорости движения по доплеровскому смещению частоты. Может использоваться в системах обнаружения и определения параметров движения целей в контролируемой зоне, например, в системах предотвращения столкновений транспортных средств. Техническим результатом является увеличение дальности действия СБРЛ, повышение надежности обнаружения и точности определения параметров движения цели путем достижения когерентности колебаний зондирующих и приемных радиоимпульсов, а также снижение потребления тока питания и уровня утечки излучения благодаря переводу автодинного генератора в импульсный режим работы, а также упрощение конструкции высокочастотной (ВЧ) части СБРЛ. В заявленном способе на выходе ВЧ генератора получают радиоимпульсы путем ударного воздействия на ВЧ генератор последовательностью парных импульсов запуска с крутыми ...

НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА

FIELD: navigation. SUBSTANCE: ground surveillance airport radar includes one immobile antenna for electron scanning of control area by azimuth in horizontal plane, radiation source and means for reception/transmission of superhigh-frequency signal with circulator, transmission channel, reception channel and means for division of mentioned reception channel into elements receiving signal of sum and one signal as minimum of difference. First and second receiving elements receive correspondingly signal of sum and signal of difference with change of frequency and generate their output signals coded in digital form. Digital signals coming from first and second receiving elements are processed for radar detection of objects or targets in controlled area. EFFECT: simplicity and reduced cost of operation of surveillance airport radar. 21 cl, 31 dwg ГУСЯ ГГЕС ПЫ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ "” 2115 141 ' 13) СЛ ОМК” 6 01$ 13/91, 13/02 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94016388/09, 13.05.1994 (30) Приоритет: 14.06.1993 ЕК 9307149 (46) Дата публикации: 10.07.1998 (56) Ссылки: СВ, патент, 2165414, кл. С 01 $ 13/91, 1986. Леонов А.И., Фомичев К.И. Мо ноимпульсная радиолокация.-М.: Радио связь, 1984, с.82-88. (71) Заявитель: Дассо Электроник (ЕК) (72) Изобретатель: Ксавье Шазелль (ЕК), Бернар Мэтр (ЕК), Бертран Огю (ЕК) (73) Патентообладатель: Дассо Электроник (ЕК) (54) НАЗЕМНАЯ ОБЗОРНАЯ РАДИОЛОКАЦИОННАЯ СТАНЦИЯ АЭРОПОРТА И РАДИОЛОКАЦИОННАЯ УСТАНОВКА (57) Реферат: Обзорная радиолокационная станция содержит в комбинации одну неподвижную антенну для обеспечения электронного сканирования контролируемого пространства по азимуту в горизонтальной плоскости, источник излучения и средства приема передачи сверхвысокочастотного сигнала с циркулятором, канал передачи, канал приема и средства для подразделения упомянутого выше канала приема на сигнал сумки и по меньшей мере один сигнал разности. Первый и второй ...

Radarvorrichtung sowie Distanz- und Geschwindigkeitsmessverfahren

Es wird eine Radarvorrichtung angegeben, die einen Analog-Digital-Wandler (7) aufweist, der eine Gleitabtastung bei Frequenz-Differenzsignalen vornimmt, die von einem Mischer (6) abgegeben werden, und der die Abtastdaten um die Frequenz-Differenzsignale in Abhängigkeit von Bereichselementen klassifiziert, und zwar auf der Basis einer Distanzauflösung, die einer Pulsbreite entspricht, welche von einer Steuerung (1) vorgegeben wird. Die Radarvorrichtung weist ferner eine Geschwindigkeits-Diskriminatoreinheit (10), die die Abtastdaten bei jedem Bereichselement trennt, nachdem diese von dem Analog-Digital-Wandler (7) klassifiziert worden sind, und zwar Abhängig von den Relativgeschwindigkeiten von Objekten. Eine Distanz- und Geschwindigkeits-Messeinheit (11) berechnet die Distanz R zu und die relative Geschwindigkeit V von einem Objekt, das einen Sendepuls reflektiert hat, und zwar unter Verwendung von Abtastdaten nach deren Trennung in Abhängigkeit von den Relativgeschwindigkeiten durch die ...

Signalverarbeitungsverfahren und Signalverarbeitungsanordnung für eine Radaranlage

Pulsed radar having a reception circuit divided into two channels with measuring regions having different scanning speeds

A device 100 is disclosed for detecting and/or evaluating at least one target object such as objects in the surrounding field of a motor vehicle wherein a sensing region or detection gate is displaced over a measuring region at a scanning speed in such a way that a target specific speed measurement during continuous detection is ensured with a short latency time. The disclosed arrangement 100 comprises a reception circuit 70 divided into at least two channels 72,74 which can be operated independently of each other. The first channel 72 of the reception circuit 70 is arranged to displace the sensing region or the detection gate over the whole measuring region at a constant scanning speed and the second channel 74 of the reception circuit 70 is arranged to displace the sensing region or the detection gate over the measuring region at a variable scanning speed and/or for a preset period of time at a diminishing scanning speed at a preset position inside the monitoring region.

Radar ranging system

Method and system for health monitoring using amplitude modulated continuous wave microwave signal

Health signal monitoring using continuous wave microwave signals is often affected by phase wrapping and null point detection issues. The disclosure herein generally relates to health monitoring, and, more particularly, to a method and a monitoring system for health monitoring using Amplitude Modulated Continuous Wave (AMCW) microwave signals. In this design of the monitoring system, the AMCW microwave signal comprises of a carrier signal and a modulating signal. The modulating signal is used for measuring heart rate and breathing rate of a subject, while the carrier signal is used to tune antenna size in the monitoring system. As the probing wavelength and the antenna size are independent of each other in this design of the monitoring system, the probing wavelength can be adjusted such that effect of the phase wrapping can be minimized. The system addresses the null point measurement problem by quadrature modulating the modulating signal. To be published with FIG.1 I Transmitter I ,Iir ...

Method and system for health monitoring using amplitude modulated continuous wave microwave signal

Health signal monitoring using continuous wave microwave signals is often affected by phase wrapping and null point detection issues. The disclosure herein generally relates to health monitoring, and, more particularly, to a method and a monitoring system for health monitoring using Amplitude Modulated Continuous Wave (AMCW) microwave signals. In this design of the monitoring system, the AMCW microwave signal comprises of a carrier signal and a modulating signal. The modulating signal is used for measuring heart rate and breathing rate of a subject, while the carrier signal is used to tune antenna size in the monitoring system. As the probing wavelength and the antenna size are independent of each other in this design of the monitoring system, the probing wavelength can be adjusted such that effect of the phase wrapping can be minimized. The system addresses the null point measurement problem by quadrature modulating the modulating signal. To be published with FIG.1 I Transmitter I ,Iir ...

Microwave flow sensor for a harvester

System and method for narrowband pre-detection signal processing for passive coherent location applications

METHOD FOR DETERMINING THE DISTANCE BETWEEN A BASE STATION AND A MOBILE OBJECT, IN ADDITION TO A BASE STATION AND IDENTIFICATION SYSTEM FOR A METHOD OF THIS TYPE

Low cost - high resolution radar for commercial and industrial applications

IMPROVED SIGNAL DETECTION AND CHARACTERIZATION

A method and system for detecting and characterizing an input signal receive a signal having an in-phase (I) component and a quadrature -phase (Q) component. A first IQ sample of the signal is acquired at a first point in time, and a second IQ sample of the signal is acquired at a second point in time, Using one or more processors, a delayed complex conjugate multiply (DCM) is applied to the first IQ sample of the signal and the second IQ sample of the signal to produce a constant product having an in-phase (I C ) component and a quadrature-phase (Q c ) component. A signal magnitude and a signal frequency are determined from the I c component of the constant and the Q c component of the constant, using the one or more processors.

APPARATUS AND METHOD FOR ATTENUATING CLOSE-RANGE RADAR SIGNALS IN AN AUTOMOTIVE RADAR SENSOR

A radar system and method include a first transmitted radar signal having a first frequency and a second transmitted radar signal having a second frequency different from the first frequency. A receiver receives reflected radar signals generated by reflection of the transmitted radar signals and generates receive signals indicative of the reflected radar signals, a first receive signal being indicative of a first reflected radar signal generated by reflection of the first transmitted radar signal, and a second receive signal being indicative of a second reflected radar signal generated by reflection of the second transmitted radar signal. A processor receives the first and second receive signals and computes a difference between the first and second receive signals to generate a difference signal, the processor processing the difference signal to provide radar information.

ИМПУЛЬСНЫЙ СВЕРХШИРОКОПОЛОСНЫЙ ДАТЧИК ДИСТАНЦИОННОГО МОНИТОРИНГА ДЫХАНИЯ И СЕРДЦЕБИЕНИЯ

FIELD: medicine. SUBSTANCE: invention refers to medical diagnostic instruments for examination of physiological functions of living organisms, particularly to radiolocation superbroadband tools of breath and heartbeat parametre diagnostics for patients. Sensor includes transceiver antenna connected to adjustable antenna switch; UHF signal generation section containing UHF signal generator, high frequency filter and buffer amplifier connected in series; adjustable electronic key of probing and reference signal generation; probing signal sector containing high frequency filter and power amplifier connected in series, with amplifier output connected to antenna switch input and high frequency filter input connected to first output of electronic key; reflected signal receiver containing low-noise amplifier, co-phased and quadrature channels, each channel including mixer, low frequency filter, low frequency amplifier, low frequency security filter and analog-to-digital converter connected in series. Input of low noise amplifier is connected to antenna switch output, while amplifier output is connected to mixers' outputs. Reference signal sector includes high frequency filter, power amplifier and phase-shifting circuit connected in series, with the circuit output connected to second input of quadrature channel mixer in receiver. Power amplifier output is also connected to second input of co-phased channel mixer in receiver, and high frequency filter input is connected to second output of electronic key. Data display unit and processing unit connected in series are connected to outputs of analog-to-digital converters. Control and timing unit input is connected to second output of processing unit and to UHF signal generator input, while second output of control and timing unit is connected to control input of electronic key and third output is connected to control input of antenna switch. EFFECT: enhanced phase sensitivity of diagnostics, eliminated blind spots within ...

СПОСОБ ОБРАБОТКИ РАДИОЛОКАЦИОННЫХ СИГНАЛОВ ДЛЯ ОБНАРУЖЕНИЯ ЦЕЛЕЙ И ИЗМЕРЕНИЯ ИХ ПАРАМЕТРОВ ДВИЖЕНИЯ В ЗОНЕ СЕЛЕКЦИИ И РАДИОЛОКАЦИОННЫЙ ДАТЧИК ЕГО РЕАЛИЗУЮЩИЙ

Изобретение относится к области ближней радиолокации с импульсной модуляцией излучения, внутриимпульсным приемом и обработкой сигналов. Способ обработки сигналов и радиолокационный датчик (РЛД) могут использоваться в системах обнаружения целей и измерения их параметров движения в зоне селекции. Техническим результатом является получение у РЛД с внутриимпульсным приемом и обработкой радиосигналов разрешающей способности по дальности и обеспечение возможности раздельного обнаружения множества объектов локации в зоне селекции, определения расстояния до них и скорости перемещения, а также параметров вибрации и закона перемещения объекта локации при обработке каждого зондирующего радиоимпульса. Радиолокационный датчик для обнаружения целей и измерения их параметров движения в зоне селекции, реализующий заявленный способ, содержит антенну, доплеровский приемо-передающий модуль с квадратурными выходами I(t) и Q(t) преобразованных сигналов, блок обработки сигналов и блок синхронизации и формирования ...

ИМПУЛЬСНЫЙ СВЕРХШИРОКОПОЛОСНЫЙ ДАТЧИК ДИСТАНЦИОННОГО МОНИТОРИНГА ДЫХАНИЯ И СЕРДЦЕБИЕНИЯ

1. Импульсный сверхширокополосный датчик дистанционного мониторинга дыхания и сердцебиения содержит: ! приемно-передающую антенну, соединенную с управляемым антенным переключателем; ! тракт формирования СВЧ сигнала, включающий последовательно соединенные генератор СВЧ-сигнала, фильтр высокой частоты и буферный усилитель; ! управляемый электронный ключ формирования зондирующего и опорного сигналов; ! тракт зондирующего сигнала, включающий последовательно соединенные фильтр высокой частоты и усилитель мощности, выход которого соединен с входом антенного переключателя, а вход фильтра высокой частоты соединен с первым выходом электронного ключа; ! приемник отраженного сигнала, включающий малошумящий усилитель, синфазный и квадратурный каналы, каждый из которых включает последовательно соединенные смеситель, фильтр низкой частоты, низкочастотный усилитель, защитный фильтр низкой частоты и аналого-цифровой преобразователь, при этом вход малошумящего усилителя соединен с выходом антенного переключателя, а выход - с входами смесителей; ! тракт опорных сигналов, включающий последовательно соединенные фильтр высокой частоты, усилитель мощности и фазосдвигающую цепь, выход которой соединен с вторым входом смесителя квадратурного канала приемника, выход усилителя мощности соединен также с вторым входом смесителя синфазного канала приемника, а вход фильтра высокой частоты соединен с вторым выходом электронного ключа; ! последовательно соединенные блок отображения информации и блок обработки, соединенный с выходами аналого-цифровых преобразователей; ! блок управления и синхронизации, вход которого соеди� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2008 105 888 (13) A (51) МПК A61B 5/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2008105888/14, 19.02.2008 Самков Сергей Витальевич (RU), Солодов Евгений Владимирович (RU) A 2 0 0 8 1 0 5 8 8 8 R U Ñòðàíèöà: 1 ru A (57) Формула изобретения 1. Импульсный ...

PULSRADARANORDNUNG

Continuous wave radar altimeter

Circuit module for a phased array radar

Circuit module for a phased array radar

Circuit module for a phased array radar

A radar system for detecting profiles of objects, particularly in a vicinity of a machine work tool

PULSE COMPRESSION RADAR SYSTEM FOR AUTOMOTIVE AND OTHER COMMERCIAL APPLICATIONS

Improvements in and relating to radar receivers

A radar receiver (200) comprises an analogue receiver (230) for receiving a radar echo signal and a digital receiver (240). The digital receiver (240) includes an analogue-to-digital converter (300A-D) arranged to receive and sample an IF analogue signal from the analogue receiver (230). The sampling is undersampling according to the Nyquist criterion, so that a plurality of IF digital signals are produced, in different Nyquist zones, including one or more aliased IF digital signal. The digital receiver (240) is arranged to select an IF digital signal from the one or more aliased digital signals.

MEASUREMENT OF BLADED ROTORS

Measurement of bladed rotors and, more particularly, speed measurement of bladed rotors in a turbine engine using microwave probes is described. In one embodiment, an apparatus for measuring bladed includes a microwave sensor that radiates a microwave signal toward a bladed rotor and receives a reflected microwave signal from the bladed rotor, a radio frequency module that generates the microwave signal radiated by the microwave sensor and down-converts the reflected microwave signal into a down-converted signal, and a main processing module configured to generate an output pulse train signal representative of a speed of the bladed rotor based on the down-converted signal. In another embodiment, a method for measuring bladed rotors is described including radiating a microwave signal, receiving a reflected microwave signal, down- converting the reflected microwave signal, and generating an output pulse train signal representative of a speed of a bladed rotor based on the down-converted signal ...

Sensor doppler/wavelet processing

A method according to an aspect of the invention is for filtering coherent multipulse radar, sonar or lidar returns. The method comprises the steps of separating the returns into mutually orthogonal I & Q components, performing wavelet processing on the I and Q components to generate an I & Q wavelet filter output. The I & Q wavelet filter outputs are data compressed to remove clutter portions. Data compression may be removal of large-amplitude or earliest wavelet responses. An inverse wavelet filtering function is performed on the compressed wavelet filter outputs, to thereby generate edited coherent I & Q components. Doppler filtering, is performed on the edited coherent I and Q components to thereby generate frequency-domain target data in which the minimum discernible target velocity is improved.

Monopulse radar system for determining the height of a target

An improved method of estimating target elevation angle for dual squinted beam radar systems is disclosed. The target's elevation angle is estimated by receiving complex I/Q data from two receive radar beams and calculating the complex ratio of the complex I/Q data. The calculated complex ratio is compared to a set of previously determined reference complex ratios in complex lookup tables that have been corelated to known target elevation angles.

СПОСОБ ИМПУЛЬСНО-ДОПЛЕРОВСКОЙ РАДИОЛОКАЦИИ И УСТРОЙСТВО С АВТОДИННЫМ ПРИЁМОПЕРЕДАТЧИКОМ ДЛЯ КОНТРОЛЯ ДВУХ ЗОН СЕЛЕКЦИИ ЦЕЛИ ПО ДАЛЬНОСТИ

Изобретение относится к системам ближней радиолокации (СБРЛ), предназначенным для обнаружения и определения параметров движения целей, как минимум, в двух зонах селекции по дальности. Может использоваться в автономных информационно-измерительных системах в качестве неконтактных датчиков обнаружения приближающихся целей, например, в системах предотвращения столкновений транспортных средств. Техническим результатом является исключение «мертвой зоны» в непосредственной близости от СБРЛ и формирования в этом диапазоне дальностей второй (ближней) рабочей зоны селекции, чем обеспечивается возможность обнаружения и определения параметров движения цели как в дальней зоне селекции, так и в непосредственной близости от СБРЛ. Заявленный способ состоит в том, что на высокочастотный (ВЧ) генератор ударно воздействуют последовательностью парных импульсов запуска с крутыми фронтами и формируют в ВЧ генераторе в течение каждого радиоимпульса когерентные относительно частоты запускающих импульсов колебания ...

Monitoring signal processing device for use in e.g. radar arranged in ship, has phase correction value and weight coherence integration section for outputting integration output that fulfils process improvement of device

The device (1) has a phase correction value calculating section (10) for retrieving estimated relative speed of a target from a parameter memory (12) and calculating a phase correction value based on the relative speed. A phase correction value and weight coherence integration section (11) executes phase-weighted coherence integration with respect to monitoring values based on the calculated phase correction value, where the monitoring values are equivalent to a coherence integration number. The integration section outputs an integration output that fulfils process improvement of the device.

RADAR

System and method for narrowband pre-detection signal processing for passive coherent location applications

Radar systems

METHOD AND APPARATUS FOR PROVIDING THE IN-PHASE AND QUADRATURE COMPONENTS OF A BANDPASS SIGNAL

TITLE METHOD AND APPARATUS FOR PROVIDING THE IN-PHASE AND QUADRATURE COMPONENTS OF A BANDPASS SIGNAL INVENTORS James P. Reilly Simon Haykin ABSTRACT OF THE DISCLOSURE The method and apparatus provides the in-phase I and quadrature Q components of a bandpass signal x(t) of center frequency fc and bandwidth 2w. The signal x(t) is heterodyned to have an intermediate center frequency fo where w ? fo ? fc. This signal is divided into two signals and each is sampled during successive periods Ts where Ts = m/fo and m is an intege. However, the instant of sampling of one signal is shifted with respect to the other by b/4fo where b is an odd integer. In the various implementations, the shift may be either positive, negative, or both, to provide the quadrature component Q, whereas the sampling of the other signal provides the in-phase component I.

CIRCUIT MODULE FOR A PHASED ARRAY RADAR

A circuit module for a phased array radar (10) incorporates radar frequency (RF) mixers (54a, 54b) connected to an RF splitter/combiner (52) and to in-phase and quadrature RF reference signals. The RF mixers (54a, 54b) are also connected to intermediate frequency (IF) processing circuitry (60 to 68) providing for phase control of RF signals and IF reference signals. In transmission mode, the RF mixer (54a, 54b) receive phase-controlled, digitally synthesised IF signals from clock-activated generators (68a, 68b). Their outputs are combined at the RF splitter/combiner (52) to provide single sideband upconversion of the phase-controlled IF signals. In reception mode, the RF splitter/combiner (52) and the RF mixers (54a, 54b) act as an image rejection mixer circuit in which the phase-controlled IF signals are local oscillator signals. Beamforming is carried out by computer control of the IF phase together with, in the case of reception, analogue or digital summation of output signals from an array of modules (12).

Radar system and control method thereof

A radar system comprises a transmitting device comprising a reference frequency source, for generating a reference frequency signal; a direct-digital synthesizer, coupled to the reference frequency source, for generating a synthesized frequency signal according to the reference frequency signal; a phase lock loop, coupled to the direct-digital synthesizer, for converting the synthesized frequency signal to an output signal; a transmitting antenna, coupled to the phase lock loop, for emitting the output signal to the air; and a loop switch module, coupled to the phase lock loop, for switching the phase lock loop between an open loop mode and a closed loop mode; and at least one receiving device, for receiving at least one wireless signal, and processing the at least one wireless signal according to the output signal generated by the phase lock loop.

Verfahren zur Auswertung von Signalen einer Sensoreinheit und Vorrichtung zur Umfelderfassung in einem Fahrzeug

Die Erfindung betrifft ein Verfahren zur Auswertung von Signalen (ULS) einer Sensoreinheit mit mindestens einem Ultraschallsensor, wobei Ultraschallsignale in einen zu überwachenden Bereich ausgesendet und in Reaktion auf die ausgesendeten Ultraschallsignale Echosignale (ULS) empfangen und zur Erfassung von Objekten und/oder Objektbewegungen in dem zu überwachenden Bereich ausgewertet werden, wobei die empfangenen Echosignale (ULS) zur Auswertung einer Quadraturphasendetektion unterworfen werden, sowie eine Vorrichtung zur Umfelderfassung in einem Fahrzeug und ein Datenverarbeitungsprogramm und ein Computerprogrammprodukt zur Durchführung des Verfahrens. Um eine weitergehende Signalauswertung durch eine Quadraturphasendetektion zu vereinfachen und eine einfache Erzeugung von erforderlichen Referenzsignalen für die Quadraturphasendetektion zu ermöglichen, werden zur Quadraturphasendetektion erforderliche Referenzsignale (S1, S2, S3, S4) unter Verwendung von digitalen Logikverknüpfungen (12, 14, 16, 18) aus einem digitalen Basissignal (S0) erzeugt, wobei vier jeweils um 90° phasenverscd jeweils einzeln mit den empfangenen Echosignalen (ULS) gemischt werden. The invention relates to a method for evaluating signals (ULS) of a sensor unit having at least one ultrasound sensor, wherein ultrasound signals are emitted into an area to be monitored and receive echo signals (ULS) in response to the emitted ultrasound signals and for detecting objects and / or object movements in the to be monitored area, wherein the received echo signals (ULS) are subjected to the evaluation of a quadrature phase detection, and a device for detecting surroundings in a vehicle and a data processing program and a computer program product for performing the method. To simplify further signal evaluation by quadrature phase detection and to allow easy generation of required reference signals for quadrature phase detection, reference signals (S1, S2, S3, S4) required for quadrature phase detection ...

Pulsed radar acquiring immediate surroundings of vehicles, includes high frequency oscillator connected to pulse modulators for transmission and reception

A continuous signal is produced by the high frequency source (1). This is connected to the transmission pulse modulator (3), and also to reception pulse modulators (71, 72). The source signal can be connected through two separately-controlled receiver pulse modulators (71, 72) to receiver mixers (4, 5).

Process for the phase detection of a received radar signal

The present invention detection relates to a process consisting in sampling the intermediate frequency signal at a sampling frequency fe such that fe is equal to alpha B, alpha being a number greater than or equal to 2 and B being the width of the pass-band, the intermediate frequency fi and the sampling frequency being in a ratio such that fi = (k +/- 1/4 )fe, k being an integer. The invention is applied. ...

Radar operation with increased doppler capability

A method may include generating for transmission a repeating sequence of ...

RADAR OPERATION WITH INCREASED DOPPLER CAPABILITY

A method may include generating for transmission a repeating sequence of N constant-frequency pulses of width t seconds at interpulse intervals of T seconds, with each pulse in the sequence having a particular constant phase according to a quadratic phase sequence, which phase is applied to each pulse in a first sense of modulation. The method may further include modulating the phase of echo energy received from one or more objects reflecting the transmitted repeating sequence of N constant-frequency pulses with a second sense of modulation opposite to the first sense of modulation. The method may further include producing from the modulated received echo energy N unique and discrete frequency translations of the received echo energy as a function of range r of the reflecting objects, of magnitude equal to multiples of 1/NT Hz, which may preserve the spectrum of the received echo energy, forming in combination a composite signal frequency spectrum.

ULTRA-WIDEBAND RADAR TRANSCEIVER AND OPERATING METHOD THEREOF

Method and Device for the Position Determination of Objects by Means of Communication Signals, and Use of the Device

The invention relates to a method for the position determination of objects (62, 707,84, 96) by means of communication signals, in which a transceiver capable of wireless communication transmits communication signals, the transceiver (51) being capable of simultaneous transmission and reception, and wherein the communication signals are at least partially reflected as reflection signals on at least one object (62, 707, 84, 96) in a signal propagation zone and the transceiver (51) receives the reflection signals. The method is characterized in that phase information of the reflection signals or communication signals are determined. The invention further relates to a corresponding device and to a use of the device.

RADAR DEVICE AND DISTANCE AND SPEED MEASUREMENT METHOD

A radar device including an ADC that performs slide sampling on frequency difference signals outputted from a mixer, and classifies sampling data about the frequency difference signals according to range bins based on a distance resolution corresponding to a pulse width set by a controller, and a speed discrimination unit that separates the sampling data about each range bin after being classified by the ADC according to relative speeds of objects. A distance and speed measurement unit calculates the distance to and the relative speed of an object which has reflected a transmission pulse by using the sampling data after being separated according to relative speeds by the speed discrimination unit.

Pulse radar detection system

A radar based sensor detection system comprises a microwave source operative to provide a continuous wave signal at an output. A pulse-former is coupled to the output of the source and is operative to provide at an output a variable length pulse that increases the transmitted energy of the radar system according to the range of object detection. A modulator is coupled to the output of the pulse-former for providing a modulated pulse signal. A transmit receive switch coupled to the output of the modulator is selectively operative between a first transmit position and a second receive position. A transmit channel coupled to the transmit receive switch transmits the pulse signal when the switch is operated in the transmit position. A receiving channel coupled to the transmit receive switch receives the modulator signal when the switch is operated in the receive position. First and second voltage multipliers each have a local oscillator input for receiving the modulator signal in the receive ...

METHOD FOR SIMPLIFYING A FILTER AND ASSOCIATED DEVICES

WETTERRADAR MIT SPEKTRALER GAUSS-EINHULLENDEN DISKRIMINIERUNG ZUM BESEITIGEN VON CLUTTER

Process for the phase amplitude demodulation of a received radar signal and device implementing such a process

Circuit module for a phased array radar

Circuit module for a phased array radar

Device and method for sensing, detecting and/or evaluating at least one object

Radar ranging system

In an airbourne ground-ranging monopulse radar system the sum (S), azimuth difference (A) and elevation difference (E) signals derived from a plurality of statistically-independent radar returns are analysed to obtain an estimate of the orientation of an iso-probability-density surface defining (with respect to corresponding coordinate axes) S, A and E amplitude combinations of a particular probability density. The orientation of this iso-probability surface indicates the target elevation off boresight, and is independent of any across-track ground slope. In a practical embodiment (fig. 8) the two difference signals are first split into separate in-phase and quadrature components A', A", E', E" relative to the sum signal S. Variances and co-variances of these four components and S are then derived (10 - 15), and an appropriate function thereof computed (16 - 22). ...

Process for the phase detection of a received radar signal and device implementing such a process

RADAR

System and method for narrowband pre-detection signal processing for passive coherent location applications

Cable guided intrusion detection sensor, system and method

CONTINUOUS WAVE RADAR ALTIMETER

A continuous wave radar altimeter comprises a pulsed power control (4), operable when the signal-to-noise ratio of the received signal is likely to be too low, to pulse the transmitted power so that the power varies between a non-zero base level and a higher level. The receiver channel (13, 14) is switched off during each transmitted pulse.

IMPROVED SIGNAL DETECTION AND CHARACTERIZATION

A method and system for detecting and characterizing an input signal receive a signal having an in-phase (I) component and a quadrature -phase (Q) component. A first IQ sample of the signal is acquired at a first point in time, and a second IQ sample of the signal is acquired at a second point in time, Using one or more processors, a delayed complex conjugate multiply (DCM) is applied to the first IQ sample of the signal and the second IQ sample of the signal to produce a constant product having an in-phase (I C ) component and a quadrature-phase (Q c ) component. A signal magnitude and a signal frequency are determined from the I c component of the constant and the Q c component of the constant, using the one or more processors.

UNLOCKED W-BAND RECEIVER WITH COHERENT FEATURES

Biometric detection method and biometric detection radar

A biometric detection method includes a signal transceiver unit transmitting a transmission signal to an area, and receiving a reflection signal reflected from the area as a detection signal, and a demodulation unit coupled to the signal transceiver unit to receive the detection signal. The demodulation unit is configured to demodulate the detection signal to output a demodulation signal, a computing unit is coupled to the demodulation unit to receive the demodulation signal, and the calculation unit calculates a RMS value of the demodulation signal. A determining unit is coupled to the computing unit to receive the RMS value of the demodulated signal, and the determining unit determines whether a biological object exists in the region according to the RMS value and a RMS threshold value.

METHOD AND SYSTEM FOR MEASURING THE VELOCITY OF A CARRIER WITH RESPECT TO THE GROUND

A method for measuring, using a radar or sonar, the velocity with respect to the ground of a carrier moving parallel to the ground, includes the following steps: a) orienting the line of sight of the radar or sonar toward the ground; b) emitting a plurality of radar or sonar signals (P1-PN) that are directed toward the ground, and acquiring respective echo signals (E1-EN); c) processing the acquired echo signals so as to obtain, for one or more echo delay values, a corresponding Doppler spectrum; d) for the or at least one the echo delay value, determining a high cut-off frequency of the corresponding Doppler spectrum; and e) computing the velocity of the carrier with respect to the ground on the basis of the one or more high cut-off frequencies. A system allowing such a method to be implemented.

Wind turbine mitigation in radar systems

Continuous wave radar altimeter

Circuit module for a phased array radar

A circuit module for a phased array radar (10, Fig 1) incorporates radar frequency (RF) reversable mixers 54a, 54b (Fig. 4) connected to an splitter/combiner 52 and to in-phase and quadrature RF reference signals from hybrid splitter 56. The RF mixers 54a, 54b are also connected to intermediate frequency (IF) processing circuitry 60 to 68. In transmission mode, the RF mixer 54a, 54b receive phase-controlled, digitally synthesised IF signals from clock-actuated generators 68a, 68b. Their outputs are combined at the RF splitter/combiner 52, to provide single sideband upconversion of the phase-control led IF signals to radar frequency for transmission by an element of the array. In reception mode, the RF splitter/combiner 52, the RF mixers 54a, 54b and IF circuitry 60 to 68 act collectively as an image rejection mixer circuit. Beamforming is carried out by computer control of the IF phases in transmission and in reception by computation of weight sums of output signals from an array of modules ...

Device and method for sensing, detecting and/or evaluating at least one object

Improved signal detection and characterization

A method and system for detecting and characterizing an input signal receive a signal having an in-phase (I) component and a quadrature -phase (Q) component. A first IQ sample of the signal is acquired at a first point in time, and a second IQ sample of the signal is acquired at a second point in time, Using one or more processors, a delayed complex conjugate multiply (DCM) is applied to the first IQ sample of the signal and the second IQ sample of the signal to produce a constant product having an in-phase ( ...

Wind turbine mitigation in Radar systems

Disclosed is an ATC Radar and a method of operating an ATC Radar, comprising the steps of: receiving In-phase (I) and Quadrature (Q) signals; creating first and second complex clutter maps using the I and Q signals; wherein the first map comprises data which is dynamically updated on a per- scan basis and the second map comprises data indicative of a static environment with no targets; subtracting data from the second map from the received I and Q signals to mitigate the effects of static objects in the environment, to yield compensated I and Q data; using the compensated I and Q data for target detection an/or tracking.

Method and Device for Supplying a Reflection Signal

The disclosure relates to a method and a device for supplying a reflection signal. According to the disclosure, an intermediate frequency signal having a high intermediate frequency can be demodulated in a numerical manner into I/Q components without intermediate frequency by means of a two channel sampling, thus enabling a complex reflection factor to be obtained.

Pulse radar apparatus and control method thereof

The invention provides a pulse radar apparatus, and a control method thereof, that permits to readily downsize and to lower its cost and allows information on an object to be detected in high precision by removing an influence of noise when a gain of a variable gain amplifier is discontinuously changed corresponding to detected distance, with a simple configuration. A variable gain amplifier 135 configured to adjust a gain corresponding to a distance gate is used to be able to detect weak reflected wave from a distant object and to amplify a reflected wave from a short distance with a low gain. An offset noise from the variable gain amplifier 135 is prepared together with interference noise and self-mixing noise in advance as a replica signal of unwanted wave and the replica signal is removed from a baseband signal in detecting the object T.

Radar operation with enhanced doppler capability

A method may include generating for transmission a repeating sequence of N constant-frequency pulses of width t seconds at interpulse intervals of T seconds, with each pulse in the sequence having a particular constant phase according to a quadratic phase sequence, which phase is applied to each pulse in a first sense of modulation. The method may further include modulating the phase of echo energy received from one or more objects reflecting the transmitted repeating sequence of N constant-frequency pulses with a second sense of modulation opposite to the first sense of modulation. The method may further include producing from the modulated received echo energy N unique and discrete frequency translations of the received echo energy as a function of range r of the reflecting objects, of magnitude equal to multiples of 1/NT Hz, which may preserve the spectrum of the received echo energy, forming in combination a composite signal frequency spectrum.

Single clock timeshared channelizer circuit

An RF detection system includes a signal routing processor and a dynamically reconfigurable channelizer. The signal routing processor selects an operating mode of the RF detection system among a plurality of different operating mode. The dynamically reconfigurable channelizer invokes the selected operating mode in response to a routing control signal output by the signal routing processor. The dynamically reconfigurable channelizer includes a plurality of signal processing resources and a crossbar switching circuit. The crossbar switching circuit includes a signal input to receive an input signal and a signal output to output a final processed signal indicating a detected object. The crossbar switching circuit selectively establishes a plurality of different signal routing paths that connect the plurality of signal processing resources to the signal input and signal output.

Pulsed radar system and method with digital mixer for frequency hopping

A radar system for generating a fast frequency hopping output for frequency agility using a transmitter block and a receiver block. The transmitter block is configured to (i) modulate a digital signal using a first digital mixer, (ii) convert a modulated signal into an inphase analog signal and provide the inphase analog signal to at least one of a first RF IQ mixer or a third RF IQ mixer, (iii) convert the modulated signal into a quadrature analog signal provide the quadrature analog signal to at least one of the first RF IQ mixer or the third RF IQ mixer, and (iv) generate the fast frequency hopping output radar signal by mixing the inphase analog signal and the quadrature analog signal with an inphase RF local oscillator signal and a quadrature RF local oscillator signal.

Radar device

A radar device includes: a transmission beam controller that selects, every first period, a transmission beam set used for transmission of a radar signal from among a plurality of transmission beam sets each including at least two transmission beam directions; and a radar transmitter that transmits the radar signal in a predetermined transmission period by using the selected transmission beam set, wherein the transmission beam controller switching, every second period within the first period, among the at least two transmission beam directions included in the transmission beam set.

Radar System and Control Method thereof

A radar system comprises a transmitting device comprising a reference frequency source, for generating a reference frequency signal; a direct-digital synthesizer, coupled to the reference frequency source, for generating a synthesized frequency signal according to the reference frequency signal; a phase lock loop, coupled to the direct-digital synthesizer, for converting the synthesized frequency signal to an output signal; a transmitting antenna, coupled to the phase lock loop, for emitting the output signal to the air; and a loop switch module, coupled to the phase lock loop, for switching the phase lock loop between an open loop mode and a closed loop mode; and at least one receiving device, for receiving at least one wireless signal, and processing the at least one wireless signal according to the output signal generated by the phase lock loop.

Least squares fit classifier for improved sensor performance

An improvement to sensor detection performance is described through use of novel least squares based (or other) sensor measurements fitting, which can significantly improve or increase the sensor Probability of Detection (Pd) while simultaneously improving or decreasing the sensor Probability of False Alarm (Pfa). Instead of just thresholding a scalar magnitude as is done in prior art signal detection methods, the new method seeks to classify time (or space, or spatio-temporal) sequenced Signal measurements from time (or space, or spatio-temporal) sequenced Noise measurements through unique features characteristic of each. The proposed method ma be implemented on most modern Radar Signal Data Processors (SDP) and therefore affords a near term, low cost opportunity to both significantly increase detection and tracking performance and/or enable ready adoption of new additional auxiliary missions currently not possible with resource constrained sensors.

METHODS AND APPARATUS FOR BLIND RANGE RECOVERY ON PULSE COMPRESSION RADARS

Methods, systems and non-transitory computer readable mediums for processing radar signals to recover signals inside a blind region are disclosed. A transmission signal is transmitted from a radar system. The radar system receives a return signal. The return signal includes a first portion of the transmission signal leaked during transmission and a second portion reflected from an object within the blind region. The return signal is partially decoded by zeroing out the first portion of the transmission signal to form a modified return signal. Pulse compression is performed over the modified return signal to form a compressed return signal. The compressed return signal is processed to calculate moment products. The moment products are calibrated with a calibration factor, wherein the calibration factor is multiplied against only calculated moment products of range gates which have been partially decoded. 1. A method for processing radar signals to recover signals inside a blind region , comprising:transmitting a transmission signal from a radar system;receiving, at the radar system, a return signal, the return signal including a first portion of the transmission signal leaked during transmission and a second portion reflected from an object within the blind region;partially decoding the return signal by zeroing out a first portion of the transmission signal leaked during transmission of the transmission signal, forming a modified return signal, and performing pulse compression over the modified return signal to form a compressed return signal;processing the compressed return signal to calculate moment products therefrom; andforming a dataset comprising data recovered from the blind region by calibrating the moment products of range gates inside the blind region with a calibration factor, wherein the calibration factor is multiplied against only calculated moment products of range gates which have been partially decoded, wherein the calibration factor is proportional ...

Radar device

Nt transmitting antennas include Nt1 (Nt>Nt1) transmitting antennas arranged on a first straight line at a first spacing, and (Nt+1−Nt1) transmitting antennas arranged on a second straight line at a second spacing in a direction orthogonal to the Nt1 transmitting antennas, where Nt1 is a value that maximizes Nt1×(Nt+1−Nt1). Na receiving antennas include Na1 (Na>Na1) receiving antennas arranged on the first straight line at a third spacing, and (Na+1−Na1) receiving antennas arranged on the second straight line at a fourth spacing in a direction orthogonal to the Na1 receiving antennas, where Na1 is a value that maximizes Na1×(Na+1−Na1).

Radar device and object detecting method for radar device

Provided is a radar device including: a transmission circuit that transmits a first transmission signal and a second transmission signal which have frequencies different from each other; a reception circuit that receives the first transmission signal and the second transmission signal which are reflected by one or a plurality of objects as a first reception signal and a second reception signal, a processor, and a memory that stores a command group executable by the processor. Quadrature demodulation is performed with respect to each of the first reception signal and the second reception signal, at least one of the first reception signal and the second reception signal is rotated on an IQ plane in correspondence with a predetermined phase angle corresponding to a predetermined distance, and the first frequency or the second frequency, the first reception signal and the second reception signal of which one is rotated is added or subtracted, and the one or plurality of objects are detected on the basis of a processing result of a processing means.

Active iq and quadrature generator for high frequency applications

An active I/Q generator circuit comprises an input node for receiving a reference oscillation signal. The circuit has an I-output and a Q-output for respectively outputting an I-signal and a Q-signal. A first active component is electrically coupled to the input node and arranged to amplify the reference oscillation signal and to output an amplified reference oscillation signal. A second active component is electrically coupled to the first active component to receive the amplified reference oscillation signal. The second active component is arranged to generate, based on the amplified reference oscillation signal, an in-phase signal and a, with respect to the in-phase signal, phase shifted signal, the second active component electrically coupled to the in-phase signal output for providing the in-phase signal and electrically coupled to the quadrature-phase output for providing the phase-shifted signal.

Radar apparatus and method for detecting target using the same

The present invention relates to a radar apparatus and a target detecting method using the same and, more specifically, a radar apparatus and a target detecting method using the same for using a constant false alarm rate (CFAR) algorithm that variably operates a threshold according to a surrounding environment to detect a target. According to an embodiment of the present invention, the target detecting method comprises: a process of receiving a radar signal; a process of generating I/Q data of the received radar signal; a process of removing a component of a clutter signal from the I/Q data of the radar signal; and a process of applying the I/Q data of the radar signal where the component of the clutter signal is removed to the CFAR algorithm to detect the target.

Determining presence and/or physiological motion of one or more subjects with multiple receiver doppler radar systems

Systems and methods for determining presence and/or physiological motion of at least one subject using a Doppler radar system are provided. In one example, the apparatus includes at least two inputs for receiving a transmitted signal (e.g., a continuous wave signal), the transmitted signal modulated during reflection from at least one subject, and logic (e.g., hardware, software, and/or firmware; including digital and/or analog logic) for determining physiological motion associated with the at least one subject (e.g., a heart rate and/or respiration rate of the subject). In one example the logic includes comparing (e.g., mixing) the received signal with the source signal. The apparatus may further comprise logic for quadrature detection of the received signals, and may include various blind source separation algorithms for detecting signals associated with separate subjects.

Radar apparatus and target object detection method

Radar and distance measuring method thereof

A radar device and a distance measuring method thereof are provided to use a plurality of radar systems without interference within the same region by assigning a reference transmission frequency to each radar system. A signal waveform generator(6) is for generating a signal waveform. A frequency conversion unit converts the waveform generated from the signal waveform generator into a reference frequency signal. A transmission/reception unit receives or transmits an output signal of the frequency conversion unit from or to a target. A signal processing unit(11) detects the moving target by processing an output signal of the transmission/reception unit, calculates an initial speed and an initial distance of the moving target, and calculates a distance by signals received step by step.

Low target velocity interferometric AMTI radar

An AMTI radar employs a dual cancellation format to cancel the clutter in the radar returns received by the apertures of an interferometric radar antenna. The three-aperture antenna presents the radar returns to three receivers which demodulate the returns to a complex in-phase signal I and a quadrature signal Q which are sampled at a pulse repetition interval at all ranges of interest. After conventional motion compensation four data sets are derived from the returns of the three apertures, L(t), C(t-τ), C(t) and R(T-τ) which represents samples taken over multiple pulse repetition intervals for each range interval or bin of interest. The data is processed by both adjacent array processing and outer array processing, the latter only requiring a minimal amount of additional capacity. Compensation phase is further adjusted in a clutter/clutter-free phase calculator allowing a much reduced phase quantity to be applied to the delayed data sets as the second part of the dual cancellation signal. Following subtraction of doppler filter outputs of the delayed data sets from the undelayed data sets in the cancellation/enhancement unit, maximum clutter cancellation is achieved in the clutter region and optimal moving target response is obtained in the clutter-free region. The two-range maps that result after subtraction of the doppler filter outputs are presented to a detection and validation processor to determine range, doppler, amplitude and angle measurements to the moving targets with a high degree of accuracy.

Method for classifying a transponder and/or signals from a transponder and reader

The invention discloses a method for classifying a transponder ( 1 ) and/or signals originating from a transponder ( 1 ) and a reader ( 20 ) for the inventive method. According to the invention, a reader ( 20 ) receives a signal ( 27, 28 ) from the transponder ( 1 ) and determines the the velocity (v), with which the transponder ( 1 ) is moving. Finally, the transponder ( 1 ) and/or signals ( 28 ) originating from the transponder ( 1 ) are classified as valid or invalid in response to the determined velocity (v).

TCAS bearing measurement receiver apparatus with phase error compensation method

A TCAS receiver, including a relative bearing measurement radio receiving apparatus for use with an antenna array having four antennas where each antenna has associated with it, its own receiver capable of demodulating both I and Q components of transmissions from an intruding aircraft.

A method for classifying a transponder and/or signals originating from a transponder and reader

The invention discloses a method for classifying a transponder (1) and/or signals originating from a transponder (1) and a reader (20) for the inventive method. According to the invention, a reader (20) receives a signal (27, 28) from the transponder (1) and determines the the velocity (v), with which the transponder (1) is moving. Finally, the transponder (1) and/or signals (28) originating from the transponder (1) are classified as valid or invalid in response to the determined velocity (v).

Methods and systems for frequency independent bearing detection

A system and method are provided for estimating bearing of a target based on RF signals received by an array of antenna elements. The system comprises first and second input channels that are configured to receive analog signals that correspond to first and second antenna elements. The system also includes an analog to digital converter module for converting each of the analog signals to digital data samples and outputting separate streams of digital data samples corresponding to each of the first and second antenna elements as first and second data streams. An in-phase and quadrature detector module includes a phase shift module for shifting each of the first and second data streams by a predetermined amount of time to form first and second phase shifted data streams. A surveillance module determines a bearing of the target based on in-phase and quadrature data.

Continuous-wave wide-band precision ranging radar equipment.

Quadrature radar apparatus

본 발명은 쿼드러쳐 레이더 장치에 관한 것으로, 수신 전력 손실을 없애고 편파 손실 및 레이더 간의 간섭을 줄이는 송신 누설 신호 제거기를 가진 쿼드러쳐 레이더 장치에 관한 것이다. TECHNICAL FIELD The present invention relates to a quadrature radar device, and to a quadrature radar device having a transmit leakage signal canceller that eliminates received power loss and reduces polarization loss and interference between radars. 본 발명은 위상이 0도, -90도, -180도, -270도인 네 개의 신호를 발생시키는 쿼드러쳐 신호 발생부와, 쿼드러쳐 신호 발생부로부터 신호를 입력받는 제1 및 제2 커플러 블록부와, 제1 및 제2 커플러 블록부로부터 신호를 입력받고 타겟을 맞고 돌아온 신호를 입력받는 안테나부와, 제1 커플러 블록부 및 안테나부 사이에 연결되어 송신 및 수신신호의 위상을 90도 지연시키는 제1 및 제2 위상지연 블록부와, 안테나로부터 제1 및 제2 커플러 블록부를 통해 입력된 수신신호를 합치고, 누설신호를 제거하는 누설신호 제거부와, 누설신호 제거부의 출력신호를 분배하는 전력 분배부와, 쿼드러쳐 신호 발생부의 신호 및 전력 분배부의 출력신호를 입력받아 믹싱하는 제1 및 제2 믹서부를 포함한다. The present invention provides a quadrature signal generator for generating four signals having phases of 0 degrees, -90 degrees, -180 degrees, and -270 degrees, and first and second coupler block units receiving signals from the quadrature signal generator. And an antenna unit receiving a signal from the first and second coupler block units and receiving a signal returning to the target, and being connected between the first coupler block unit and the antenna unit to delay a phase of a transmission and reception signal by 90 degrees. The first and second phase delay block unit, the received signal input from the antenna through the first and second coupler block unit, the leakage signal removal unit for removing the leakage signal, and the output signal of the leakage signal removal unit for distributing And a power divider, and first and second mixers configured to receive and mix signals of the quadrature signal generator and output signals of the power divider. 상기와 같은 본 발명은 수신 전력 손실을 없애고 편파 손실 및 레이더 간의 간섭을 제거하는 효과가 있다. The present invention as described above has the effect of eliminating the received power loss and the polarization loss and the interference between the radar. 쿼드러쳐, 레이더 장치, 누설신호, 믹싱 Quadrature, Radar Device, Leakage ...

Radar-based sensing of the position and / or movement of the body or in the body of living beings

Die Erfindung betrifft ein Verfahren zur Sensierung von Informationen über Lage und/oder Bewegungen des Körpers eines Lebewesens oder eines Körperteils im Körperinneren, insbesondere zur Verwendung in einem Kraftfahrzeug. Das Verfahren enthält die Schritte: DOLLAR A Senden (18) eines elektromagnetischen Signals (15), das erfindungsgemäß Frequenzen im Radarbereich aufweist, auf einen vorgegebenen Körperbereich eines Lebewesens, DOLLAR A Empfangen (20) eines aus dem Körperbereich reflektierten elektromagnetischen Signals (22), DOLLAR A Auswerten (30) des eingefangenen Empfangssignals (22) hinsichtlich Laufzeit- und/oder Frequenzunterschied zum Sendesignal (15) zur Feststellung der Informationen. DOLLAR A Mit dem erfindungsgemäßen Verfahren können die Atmung und der Herzschlag sowie die Lage des Körpers eines Fahrers eines Kraftfahrzeuges berührungslos während der Fahrt überwacht werden. The invention relates to a method for sensing information about the position and / or movements of the body of a living being or a part of the body inside the body, in particular for use in a motor vehicle. The method includes the steps: DOLLAR A sending (18) an electromagnetic signal (15), which according to the invention has frequencies in the radar range, to a predetermined body area of a living being, DOLLAR A receiving (20) an electromagnetic signal (22) reflected from the body area, DOLLAR A evaluation (30) of the received signal (22) with respect to the transit time and / or frequency difference to the transmission signal (15) to determine the information. DOLLAR A With the method according to the invention, the breathing and the heartbeat as well as the position of the body of a driver of a motor vehicle can be monitored without contact while driving.

Differential Signal Detecting Apparatus and Digital Receiver using the same

According to the present invention, disclosed are a differential signal detecting apparatus and a digital receiver using the same. The differential signal detecting apparatus includes a signal detecting unit calculating an amplitude value of generated I/Q data and a differential value for the amplitude, comparing a predetermined set range for detecting a signal with the differential value, and detecting a signal by comparing a predetermined comparison value with the differential value. Moreover, the differential signal detecting apparatus detects a pulse even in a situation where multiple pulses are mixed and can be overlapped, and measures a specification.

Radar signal generator

Various implementations described herein are directed to an apparatus having a transmit signal generator for a pulse compression radar. The transmit signal generator may include a frequency modulation stage with phase-lock-loop (PLL) circuitry configured to generate a transmit signal at antenna frequency. The transmit signal generator may include an amplitude modulation stage configured to shape an amplitude of the generated transmit signal.

A method for classifying a transponder and/or signals originating from a transponder and reader

本发明公开了一种对应答器(1)和/或源自应答器(1)的信号进行分类的方法，以及针对本发明的方法的读出器(20)。根据本发明，读出器(20)接收来自应答器(1)的信号(27，28)，并确定应答器(1)移动的速度(v)。最终，基于所确定的速度(v)，将应答器(1)和/或源自应答器(1)的信号(28)分类为有效的或无效的。

Radar device and positioning method

Range side lobe removal device, signal-processing device, radar device provided with the signal-processing device, and method of removing range side lobe

This disclosure provides a range side lobe removal device, which includes a pulse compressor for acquiring a reception signal from a radar antenna and generating a pulse-compressed signal by performing a pulse compression of the reception signal, a pseudorange side lobe generator for generating a pseudo signal of range side lobes of the pulse-compressed signal based on the reception signal, and a signal remover for removing a component corresponding to the pseudo signal from the pulse-compressed signal.

Pulse radar device and method for controlling same

A pulse radar apparatus and a control method therefor are provided that can detect information about a target with a high degree of accuracy by allowing detection of target information at all times and updating a replica signal of a noise signal in order. When the number of sets of distance data n1 is determined to be more than the number of sets of all distance data Nr in step S5, it is determined that target information detection processing is finished, and replica signal generation processing is subsequently performed. The radar function is activated in steps S13, S15, S16, and the noise signal for each distance data is obtained in step S17. Thereafter, in steps S19, S21, S23, the first, second, and third background signals, respectively, are generated, and thereafter, in step S23, a replica signal is generated.

Ground surveillance radar device, especially for airports.

Le dispositif radar de surveillance comprend en combinaison une antenne fixe (10) pour fournir un balayage électronique de l'espace en gisement dans le plan horizontal, une source d'émission (GEN) et des moyens d'émission/réception hyperfréquence (HFA; HFB), avec un circulateur (20), une voie d'émission (VE), une voie de réception (VR) et des moyens (DIR; 29) pour subdiviser la voie de réception en un signal somme (VR1) et au moins un signal différence (VR2). Un premier et un second éléments récepteurs avec changement de fréquence (REC1 et REC2), reçoivent respectivement les signaux somme et différence, et fournissent des sorties codées en numérique. Des moyens de traitement (40) traitent des signaux numériques issus des premier et second éléments récepteurs (REC1 et REC2), pour la détection radar d'objets dans la zone surveillée. The surveillance radar device comprises in combination a fixed antenna (10) for providing an electronic scan of the space in the horizontal plane, a transmission source (GEN) and microwave transmission / reception means (HFA; HFB), with a circulator (20), a transmission channel (VE), a reception channel (VR) and means (DIR; 29) for subdividing the reception channel into a sum signal (VR1) and at least a difference signal (VR2). First and second receiver elements with frequency change (REC1 and REC2), respectively receive the sum and difference signals, and provide digital coded outputs. Processing means (40) process digital signals from the first and second receiving elements (REC1 and REC2), for radar detection of objects in the monitored area.

Method for amplitude phase demodulation of a radar reception signal and device making it possible to implement such a method.

CONTINUOUS EMISSION RADAR ALTIMETER

L'altimètre radar à émission continue selon l'invention comprend un moyen de commande de puissance pulsé (4), ayant pour fonction, lorsque le rapport signal-bruit du signal reçu est susceptible d'être trop bas, de pulser la puissance émise de façon que la puissance varie entre un niveau de base non nul et un niveau supérieur. Pendant la durée de chaque impulsion émise, le canal récepteur (13, 14) cesse d'être en service. The continuously transmitting radar altimeter according to the invention comprises a pulsed power control means (4), having the function, when the signal-to-noise ratio of the received signal is liable to be too low, to pulse the transmitted power of so that the power varies between a non-zero base level and a higher level. During the duration of each transmitted pulse, the receiving channel (13, 14) ceases to be in service.

Method of simplifying a filter and associated devices

Procédé de simplification d’un filtre et dispositifs associés L’invention concerne un procédé de simplification d’un filtre numérique de signal échantillonné, le procédé comportant au moins une étape de: - pour obtenir un premier filtre intermédiaire, rassemblement des voies comportant des opérations non-stationnaires discrètes portant sur le même signal, les premières voies comportant les opérations non-stationnaires portant sur un premier signal et les deuxièmes voies comportant les opérations non-stationnaires portant sur un deuxième signal, - pour obtenir un deuxième filtre intermédiaire, sur chacune des premières voies et deuxièmes voies, commutation des opérations stationnaires avec les opérations non-stationnaires, pour éliminer les opérations non- stationnaires redondantes, et - construction du filtre correspondant au dernier filtre intermédiaire obtenu. Figure pour l'abrégé : Figure 11

DEVICE FOR GENERATING AND / OR DETECTING A RADAR SIGNAL

DEVICES AND METHODS FOR ENTERING, DETECTING AND / OR OPERATING AT LEAST ONE OBJECT

Par le dispositif et selon les procédés de saisie, détection, ou d'exploitation d'un objet, on déplace une fenêtre de détection avec une vitesse de balayage sur la plage de mesure.Pour déterminer de façon unique la vitesse avec un faible temps de latence et une résistance poussée vis-à-vis des fluctuations, on divise le circuit de réception (70) à l'aide d'un diviseur de puissance (36) en aval de la sortie (34c) du mélangeur I/Q (34) en deux canaux indépendants (72, 74).Dans le premier canal (72) on déplace la fenêtre de détection à vitesse constante sur toute la plage de mesure. Dans le second canal (74) on déplace la fenêtre à vitesse variable notamment réduite sur la plage des mesures et on la fixe pour une durée prédéterminée sur une position prédéterminée de la plage de mesure à la disparition de la vitesse de balayage. By means of the device and according to the methods of inputting, detecting, or operating an object, a detection window with a scanning speed is moved over the measuring range. To uniquely determine the speed with a short latency and increased resistance to fluctuations, the receiving circuit (70) is divided using a power divider (36) downstream of the output (34c) of the I / Q mixer (34 ) into two independent channels (72, 74) .In the first channel (72), the detection window is moved at constant speed over the entire measurement range. In the second channel (74), the variable speed window, in particular a reduced speed, is moved over the measurement range and fixed for a predetermined duration at a predetermined position of the measurement range when the scanning speed disappears.

Ground surveillance radar device, especially for airports.

Phase amplitude demodulation of radar signal by intermediate UHF signal

La présente invention concerne un procédé de démodulation amplitude phase d'un signal de réception radar et un dispositif de mise en œuvre, le procédé consistant à échantillonner le signal à fréquence intermédiaire à une fréquence d'échantillonnage fe telle que fe soit égale à alphaB, alpha étant un nombre supérieur ou égal à 2 et B la largeur de la bande passante, la fréquence intermédiaire fi et la fréquence d'échantillonnage étant dans un rapport tel que fi = (k +- (1/4)) fe , k étant un nombre entier. Application aux radars à détection cohérente.

Rapidly adaptive cfar detection method for radars with antenna arrays

The present invention relates to a fast adaptive CFAR detection method in a radar mounting an array antenna, which has a low rank (LR) interference scenario in which the number of samples required to estimate the covariance matrix for the interference signal is limited, and is performed by an operating system of a radar mounting the array antenna. According to the present invention, the fast adaptive CFAR detection method is very effective when detecting targets in a situation having low sample numbers in the radar mounting an adaptive array antenna.

Observation signal processing apparatus

An observation signal processing apparatus transmits a pulse signal as a search signal, generates an observation value based on a reflected signal against a target and a delay modulation pulse signal, and performs coherent integration on the observation value to output an integration value. The apparatus includes a section for determining a coherent integration count, a section for transmitting pulse signals equivalent to the coherent integration count, a section for calculating a phase correction amount based on an estimated relative speed, and a section for performing phase-weighted coherent integration on observation values for the number of times equivalent to the coherent integration count based on the phase correction amount.

Method and device for pulse classification of radar signals

Méthode, mise en œuvre par ordinateur, de classification d'impulsions de signaux radar comprenant les étapes de :- Recevoir (101) des signaux radar émis par une pluralité d'émetteurs de différents types,- Numériser (102) les signaux radar reçus pour produire un signal numérisé,- Détecter et isoler (103) un ensemble d'impulsions à partir du signal numérisé,- Appliquer (104) un pré-traitement à chaque impulsion pour les rendre indépendantes de modulations intentionnelles,- Fournir les impulsions en entrée d'un moteur d'apprentissage automatique pour classifier (105) les impulsions en différentes catégories correspondant chacune à un type d'émetteur.

Method for evaluating signals of a sensor unit and device for environmental detection in a vehicle

Level measuring device operating with microwaves

The microwave measuring device, which preferably operates with microwave bursts, serves to produce a measured value (X H ) representing the level of the contents of a vessel ( 200 ). It comprises a transceiver unit ( 2 ) for generating a level-dependent intermediate-frequency signal (ZF) by means of a transmit signal (S 2 ) and a receive signal (E 2 ), and a transducer element ( 1 ) which in operation couples waves (S 2 ), particularly pulsed waves, into the vessel under control of the transmit signal (S 2 ) and converts echo waves (E 1 ) reflected from the contents ( 201 ) of the vessel into the receive signal (E 2 ). The intermediate-frequency signal (ZF) is fed to a control unit ( 3 ) of the level measuring device where it is stored in the form of a sampling sequence (AF) in a volatile data memory ( 33 ). In this manner, both amplitude information and phase information is available for the level measurement. The device is thus capable of measuring level with high accuracy, particularly accurately to a millimeter, and very fast.

Radar equipment

アンテナ系統処理部は、受信信号と送信符号との相関値を、所定回数コヒーレント積分する。相関行列生成部は、各コヒーレント積分値を基に相関行列を生成する。距離推定部は、ターゲットまでの距離を推定する。方向ベクトル記憶部は、ターゲットに対する方位角成分と、所定の方向を基準とした場合の送信アンテナからターゲットへの仰角成分とを含む方向ベクトルを記憶する。到来方向推定部は、相関行列とターゲットまでの距離を基に仰角成分範囲を限定した方向ベクトルを用いて、ターゲットの到来方向を推定する。 The antenna system processing unit coherently integrates the correlation value between the received signal and the transmission code a predetermined number of times. The correlation matrix generation unit generates a correlation matrix based on each coherent integration value. The distance estimation unit estimates the distance to the target. The direction vector storage unit stores a direction vector including an azimuth angle component with respect to the target and an elevation angle component from the transmission antenna to the target with a predetermined direction as a reference. The arrival direction estimation unit estimates the arrival direction of the target using a direction vector in which the elevation angle component range is limited based on the correlation matrix and the distance to the target.

Continuous wave wideband precision ranging radar

Method and device for providing a reflection signal

Beschrieben wird ein Verfahren und eine Vorrichtung zum Bereitstellen eines Reflexionssignals, bei dem ein Zwischenfrequenzsignal entweder mit einem Tiefpass- oder Bandpass-Sigma-Delta-Modulator abgetastet, demoduliert, gefiltert, in der Taktfrequenz reduziert und zur Weiterverarbeitung bereitgestellt wird. Disclosed is a method and apparatus for providing a reflection signal in which an intermediate frequency signal is sampled with either a low pass or bandpass sigma-delta modulator, demodulated, filtered, reduced in clock frequency, and provided for further processing.

Distance measuring apparatus and impulse iq signal mismatch calibration apparats

본 실시예에 의한 타겟에 임펄스 신호를 제공하여 타겟에서 반사된 신호를 이용하여 타겟과의 거리를 측정하는 장치는: 클록 신호를 제공받고, 제공된 코드에 상응하는 펄스를 출력하는 디지털-시간 변환기(DTC, digital to time converter)와, DTC가 출력한 펄스로 트리거되어 I(in-phase) 템플릿 임펄스 신호를 형성하는 I 템플릿 생성부와, DTC가 출력한 펄스로 트리거되어 Q(quadrature) 템플릿 임펄스 신호를 형성하는 Q 템플릿 생성부와, 타겟에서 반사된 신호와 I 템플릿 임펄스 신호로 복조하는 I 코릴레이터와, 타겟에서 반사된 신호와 Q 템플릿 임펄스 신호로 복조하는 Q 코릴레이터 및 복조 결과를 디지털 코드로 변환하여 타겟과의 거리를 측정한다. An apparatus for providing an impulse signal to a target and measuring a distance to a target using a signal reflected from the target according to the present embodiment includes: a digital-time converter that receives a clock signal and outputs a pulse corresponding to the provided code ( DTC, digital to time converter), an I template generator that is triggered by the pulse output from the DTC to form an I (in-phase) template impulse signal, and a Q (quadrature) template impulse signal that is triggered by the pulse output from the DTC A Q template generation unit that forms, an I correlator that demodulates the signal reflected from the target and the I template impulse signal, a Q correlator that demodulates the signal reflected from the target and the Q template impulse signal, and the demodulation result into digital It is converted into a code to measure the distance to the target.

Radar device

A radar device is provided in which, even when a measurement target moves, the low range side lobe characteristics is maintained, and impairment of the separation performance in detection of a plurality of targets is suppressed. A high-frequency transmission signal is transmitted from a transmission antenna with a predetermined transmission period, and a signal of a reflected wave reflected from a target is received by a reception antenna. A code generator generates a first code sequence and second code sequence that constitute a pair of complementary codes. A first modulator modulates the first code sequence to generate a first transmission signal. A second modulator modulates the second code sequence to generate a second transmission signal. A quadrature modulator performs quadrature modulation by using the generated first and second transmission signals. The high-frequency transmission signal is generated from a signal that is quadrature modulated, and transmitted from the transmission antenna.

Cable guided intrusion detection sensor, system and method

The present invention provides an intrusion detecting system and method for precisely locating an intruder along the length of a sensor cable and for determining the intruder distance from the cable to precisely locate multiple, simultaneously occurring intrusions. The method includes the steps of: generating a TX signal and transmitting same over a first transmission line of the sensor cable, for creating an electromagnetic field; detecting an RX signal induced in a second transmission line of the cable by the electromagnetic field and identifying in the RX signal a contra-directional reflection received from a target and a co-directional reflection received from the far-end (F) of the first transmission line, processing the contra-directional reflection for providing a first coordinate (R) of the target, and processing the co-directional reflection for providing a second coordinate (Z) of the target. The method and system may also be implemented with a "true one cable" using a single coaxial cable sensor with a directional coupler for separating coupled signals along a single transmission line in the cable. Ultra high speed data correlation of the RX signal is achieved through use of a field programmable gate array. The present invention also provides a separate calibrated threshold for every meter of cable to reduce the installation cost associated with meticulous control and the number of cables required for sites with varying burial mediums. In another embodiment, the use of two parallel single cables may be utilized whereby each cable in the system is used to detect and locate intruders independently and more clearly define the direction of crossing and the speed of crossing.

Machine tool monitoring device

Die Erfindung geht aus von einer Werkzeugmaschinenüberwachungsvorrichtung mit einer Erkennungseinheit (24) zur Erkennung einer Anwendungssituation (66, 80) bei einer Werkzeugmaschine (10), wobei die Erkennungseinheit (24) eine Positions- und/oder Geschwindigkeitsbestimmung von menschlichem oder tierischem Gewebe ermöglicht. Es wird vorgeschlagen, dass die Werkzeugmaschinenüberwachungsvorrichtung zumindest einen Ultrabreitband-Radarsensor (26, 28, 30) aufweist. Des Weiteren betrifft die Erfindung eine Werkzeugmaschine mit einer derartigen Werkzeugmaschinenüberwachungsvorrichtung. The invention relates to a machine tool monitoring device with a recognition unit (24) for detecting an application situation (66, 80) in a machine tool (10), wherein the recognition unit (24) enables a position and / or velocity determination of human or animal tissue. It is proposed that the machine tool monitoring device has at least one ultra-wideband radar sensor (26, 28, 30). Furthermore, the invention relates to a machine tool with such a machine tool monitoring device.

Pseudo-code ranging system

本发明公开了一种伪码测距系统，其特征在于：包括解密计算机、伪码测距机、天线和机载转发应答机，所述解密计算机通过伪码测距机、天线与机载转发应答机连接，所述伪码测距机包括测距基带板、接收通路、发射通路和腔体滤波双工器，所述腔体滤波双工器分别与接收通路、发射通路和天线连接，所述测距基带板分别与接收通路、发射通路和解密计算机连接，所述测距基带板包括基带控制单元和信号处理单元。本发明一种伪码测距系统能够实现光电经纬仪的单站定位功能，提高复杂气象条件下测距精度和满足测距距离的无线电测距系统，有效解决了光电经纬仪工作时间短不能满足长时间测距问题。本发明可广泛应用于测距系统中。

Method and apparatus for coherent marine radar measurements of properties of ocean waves and currents

A method and apparatus of determining a wave height directional spectrum of an ocean wave field using the intermediate-frequency (IF) signal from marine radars with a rotating antenna, using either a fully coherent or a standard non-coherent transmitter/receiver modified for coherent-on-receive use. The method may include receiving the IF radar ocean surface echo signal for a series of transmit pulses, at a sequence of azimuthal antenna positions, and a number of antenna rotations covering several minutes, then generating a matrix of complex IF signal samples from these, deriving phases for each sample, generating the difference in phase for consecutive azimuths, then Doppler shifts, and finally radial velocities. These are interpolated to a Cartesian-transformed representation cube of samples, a subset of which is Fourier transformed in three dimensions, filtered, and the resulting power spectrum generated is used to derive ocean wave height directional spectra, frequency spectra, and root-mean-squared wave height.

Filtering process with reduced latency and associated devices

Procédé de filtrage avec latence réduite et dispositifs associés L’invention concerne un procédé de filtrage d’un signal d’entrée numérique échantillonné à une fréquence d’échantillonnage pour obtenir un signal filtré, le procédé comportant au moins une étape d’obtention d’un premier (respectivement deuxième) signal de sortie par la mise en œuvre de premières (respectivement deuxièmes) opérations sur la première (respectivement deuxième) voie de traitement, les premières (respectivement deuxièmes) opérations comportant au moins l’application d’un filtrage impliquant une transformée de Fourier discrète à M/2 points sur un signal issu du signal d’entrée, le filtrage présentant une latence de M, - application d’une transformée de Fourier discrète inverse à M/2 points sur le premier signal pour obtenir M points de spectre du premier signal, M étant un nombre entier strictement supérieur à 2, et - recombinaison des résultats de deux voies de calcul. Figure pour l'abrégé : Figure 11 Filtering method with reduced latency and related devices The invention relates to a method for filtering a digital input signal sampled at a sampling frequency to obtain a filtered signal, the method comprising at least one step for obtaining a first (respectively second) output signal by implementing first (respectively second) operations on the first (respectively second) processing channel, the first (respectively second) operations comprising at least the application of a filtering involving a discrete Fourier transform at M/2 points on a signal coming from the input signal, the filtering presenting a latency of M, - application of an inverse discrete Fourier transform at M/2 points on the first signal to obtain M spectrum points of the first signal, M being an integer strictly greater than 2, and - recombination of the results of two calculation channels. Figure for the abstract: Figure 11

CODING METHOD OF A SIGNAL, RECEIVER DEVICE AND ASSOCIATED TRANSMISSION SYSTEM

Pulse compression radar system for automotive and other commercial applications

Least squares fit classifier for improved sensor performance

An improvement to sensor detection performance is described through use of novel least squares based (or other) sensor measurements fitting, which can significantly improve or increase the sensor Probability of Detection (Pd) while simultaneously improving or decreasing the sensor Probability of False Alarm (Pfa). Instead of just thresholding a scalar magnitude as is done in prior art signal detection methods, the new method seeks to classify time (or space, or spatio-temporal) sequenced Signal measurements from time (or space, or spatio-temporal) sequenced Noise measurements through unique features characteristic of each. The proposed method ma be implemented on most modern Radar Signal Data Processors (SDP) and therefore affords a near term, low cost opportunity to both significantly increase detection and tracking performance and/or enable ready adoption of new additional auxiliary missions currently not possible with resource constrained sensors.

Improved signal detection and characterization

Signal-processing systems and methods for echo ranging systems, and related computer program products

Wind turbine mitigation in radar systems

Un método para hacer funcionar un Radar ATC (1), que comprende las etapas de: recibir señales En fase (I) y Cuadratura (Q); crear un primer y segundo mapas de clutter complejos usando las señales I y Q; en donde el primer mapa comprende datos que se actualizan de forma dinámica por exploración y el segundo mapa comprende datos indicativos de un ambiente estático sin objetivos; sustraer datos del segundo mapa de las señales I y Q recibidas para mitigar los efectos de los objetos estáticos en el ambiente, para producir datos I y Q compensados; usar los datos I y Q compensados para la detección de objetivos y/o monitoreo, caracterizado por que si un retorno se recibe de una aspa de turbina eólica, que es sustancialmente más alto que otros retornos de la misma ráfaga de transmisión, entonces el retorno sustancialmente más alto se ignora o atenúa para estar de acuerdo con otros retornos de la misma ráfaga de transmisión.

Anti-collision system for vehicles

(To be Reissued in later week upon receipt of correct document)

Radar device

A radar device includes: a transmission beam controller that selects, every first period, a transmission beam set used for transmission of a radar signal from among a plurality of transmission beam sets each including at least two transmission beam directions; and a radar transmitter that transmits the radar signal in a predetermined transmission period by using the selected transmission beam set, wherein the transmission beam controller switching, every second period within the first period, among the at least two transmission beam directions included in the transmission beam set.

Waveform transformation and reconstruction

A method for transforming and reconstructing a signal includes receiving a plurality of samples of a waveform of the signal at different points in time. The waveform of the signal is transformed, for each sample, into an in-phase (I) component and a quadrature (Q) component. A derotational circuit applies a delayed complex conjugate multiple (DCM) to the signal to determine a constant product having an I component (Ic) and a Q component (Qc). A magnitude component is determined based on Ic and Qc. A delta phase component is determined based on Ic and Qc. The magnitude component is processed to create a processed magnitude component. The delta phase component is processed to create a processed delta phase component. An IQ waveform is created by reconstructing the waveform of the signal based on the processed magnitude component and the processed phase component.

CONTINUOUS EMISSION RADAR ALTIMETER

Un altimètre radar à émission continue comprend une mémoire (24, 26), un moyen servant à emmagasiner dans la mémoire sous forme numérique un réseau de signaux de retour représentatifs de la variation de l'amplitude réfléchie avec la longueur du trajet, un moyen (27) servant à adresser la mémoire afin d'identifier un retour de crête représentatif des objets les plus hauts sur le terrain, un moyen (28) répondant au réseau en déterminant son rapport signal-bruit, et un moyen (29) répondant à la hauteur à laquelle ledit retour de crête a lieu et au rapport signal-bruit en déterminant une hauteur de "centre de zone" représentatif de la surface la plus basse sur le terrain. L'altimètre fournit donc non seulement le niveau de crête, représentant par exemple le sommet des arbres et des bâtiments, mais également le niveau du sol. A continuously transmitting radar altimeter comprises a memory (24, 26), means for storing in the memory in digital form an array of return signals representative of the variation of the reflected amplitude with the length of the path, means ( 27) serving to address the memory in order to identify a peak return representative of the highest objects in the field, a means (28) responding to the network by determining its signal-to-noise ratio, and a means (29) responding to the height at which said peak return occurs and signal-to-noise ratio by determining a "center of area" height representative of the lowest surface on the ground. The altimeter therefore provides not only the peak level, representing for example the tops of trees and buildings, but also the ground level.

Radar system and accurate method of range resolution

In accordance with the teachings of the present invention, a radar system (20) and method of determining the range (R) to a remote target (14) is provided. The method includes computing a plurality of simulated M-dimensional points (x o (t)) as a function of return pulse arrival times over a range of expected return pulse arrival times (t 1 through t 2 ). The computed simulated points (x o (t)) are stored as function of return pulse arrival times in a memory (42) of the system (20). An antenna (10) is aligned in the direction of the remote target (14) and transmits at least one electromagnetic pulse (12) in the direction of the remote target (14) such that the pulse (12) reflects off the remote target (14) as a return pulse (16). The return pulse (16) is sampled at M different times representing a M-dimensional measured point (x). The measured point (x) is compared with each of the simulated points (x o (t)) stored in the memory (42) for determining which of the simulated points (x o (t)) and its corresponding pulse arrival time are closest to the measured point (x).

Radar sensor

In the proposed radar sensor, a phase shifter which can be switched between two phases is interposed between a microwave generator and an antenna. A demodulator (DM) demodulates the received reflected signal on which the microwave signal from the microwave generator is superimposed. A demultiplexer (DEMUX) downstream of the demodulator (DM) separates the two phase-shifted demodulated signals. The measurement result obtained is largely free of noise.

Pulsed rf oscillator and radar motion sensor

A pulsed RF oscillator employing a BIAS-ON path (14) and a QUENCH path (16) to produce fast turn-on and fast turn-off RF bursts (22) with well-controlled burst width. The oscillator includes amplitude and stability control elements, and a 5.8 GHz microstrip implementation. The RF oscillator can be configured with quadrature RF homodyne detectors (24, 29) to form a range-gated pulse-Doppler motion sensor system for sensing target motion within a gated region. The sensor includes a transmitter for transmitting a sequence of RF bursts comprised of a number of cycles at the transmitter frequency. The sensor includes a receiver responsive to the transmitted bursts and burst echoes from the moving targets within its sensing field. The receiver produces Doppler signal with an amplitude representative sum of the transmitted burst and the echo burst. A Doppler motion response occurs for moving targets within a region sharply defined by the transmitted burst width.

System and method for reducing false positive detection between a human and a moving implement in a power tool

一种用于检测物体与动力工具中的器械接触的误报条件的方法，包括：对接收自器械的电信号采样；确定所采样的电信号的同相分量和正交分量；根据样本的同相分量和正交分量来确定每个样本的幅度；根据多个样本来检测接近器械的物体；确定样本的信噪比；以及根据所确定的样本的所确定的信噪比来确定对于所检测到的物体的误报条件。

Method of simplifying a filter and associated devices

Procédé de simplification d’un filtre et dispositifs associés L’invention concerne un procédé de simplification d’un filtre numérique de signal échantillonné, le procédé comportant au moins une étape de: - pour obtenir un premier filtre intermédiaire, rassemblement des voies comportant des opérations non-stationnaires discrètes portant sur le même signal, les premières voies comportant les opérations non-stationnaires portant sur un premier signal et les deuxièmes voies comportant les opérations non-stationnaires portant sur un deuxième signal, - pour obtenir un deuxième filtre intermédiaire, sur chacune des premières voies et deuxièmes voies, commutation des opérations stationnaires avec les opérations non-stationnaires, pour éliminer les opérations non- stationnaires redondantes, et - construction du filtre correspondant au dernier filtre intermédiaire obtenu. Figure pour l'abrégé : Figure 11 Method for simplifying a filter and associated devices The invention relates to a method for simplifying a digital filter for a sampled signal, the method comprising at least one step of: - to obtain a first intermediate filter, grouping of the channels comprising operations discrete non-stationary operations relating to the same signal, the first channels comprising the non-stationary operations relating to a first signal and the second channels comprising the non-stationary operations relating to a second signal, - to obtain a second intermediate filter, on each of the first channels and second channels, switching of the stationary operations with the non-stationary operations, to eliminate the redundant non-stationary operations, and - construction of the filter corresponding to the last intermediate filter obtained. Figure for abstract: Figure 11

Dual polarization radar apparatus and interference judgment method

According to one embodiment, a dual polarization radar apparatus includes a received power calculation unit configured to calculate a horizontal polarization received power and a vertical polarization received power, the horizontal polarization received power indicating a power value of a horizontal polarization received signal reflected from an observation target, the vertical polarization received power indicating a power value of a vertical polarization received signal reflected from the observation target, a power ratio calculation unit configured to calculate a power ratio between the horizontal polarization received power and the vertical polarization received power, and an interference judgment unit configured to judge that an interference signal is mixed to the horizontal polarization received signal or the vertical polarization received signal when the power ratio is greater than a predetermined threshold value.

Cable guided intrusion detection sensor, system and method

Distance measuring apparatus and method using impulse correlation

The present invention provides a distance measurement apparatus and method using a correlation of impulse capable of significantly increasing a measurable distance and measuring a position of an object with higher precision. According to the present invention, the distance measurement apparatus comprises: a digital-to-time converter (DTC) generation unit generating a DTC signal having a delayed edge to classify time sections in units of preset time intervals based on a start time point at which the impulse signal is emitted; a template generation unit continuously generating template signals having the same waveform as that of the impulse signal in a predetermined number within the time interval in response to the DTC signal; a rough time determination unit determining a time interval in which the delayed signal is received by calculating a correlation with a plurality of continuously generated template signals when receiving a delayed signal received when the emitted impulse signal is reflected by an object to be delayed; a precise time measurement unit determining the time when the delay signal is received within the time interval determined from the result of calculating the correlation between each of a plurality of template signals within the time interval determined by the rough time determination unit and the delay signal; and a distance calculation unit calculating the total delay time of the delay signal from determined time interval and the time when the delay signal is received within the time interval and calculating a distance to a measurement target object from the calculated delay time.

Radar-assisted sensing of the position and/or movement of the body or inside the body of living beings

The present invention relates to a method for sensing information about the position and/or movements of the body of a living being or a part of the body inside the body, in particular for use in a motor vehicle. The method includes the steps: Send ( 18 ) an electromagnetic signal ( 15 ) that includes, according to the invention, frequencies in the radar range, to a predetermined area of the body of a living being, Receive ( 20 ) an electromagnetic signal ( 22 ) reflected from the area of the body, Evaluate ( 30 ) the captured receive signal ( 22 ) with regard for the difference in delay time and/or frequency relative to the transmit signal ( 15 ) to determine the information. With the method according to the present invention, the breathing and heart rate and the position of the body of a driver of a motor vehicle can be monitored in contactless fashion during the drive.

Method for operating a uwb device

본 발명은 적어도 하나의 송신 안테나 및/또는 적어도 하나의 수신 안테나를 갖는 UWB 장치를 동작하는 방법에 관한 것이다. 상기 방법은: 교번하는 극성의 실질적으로 정현파의 시퀀스 및 상이한 진폭을 갖고 특히 5차 가우시안 펄스 신호를 갖는 제어 펄스 신호(13, 13')에 의해 상기 송신 안테나(12) 또는 상기 수신 안테나(12')를 제어하는 단계를 포함하며, 상기 송신 안테나(12)는 상기 송신 안테나(12)에 결합되고 생성될 상기 펄스의 진폭과 관련된 저항을 갖는 제 1 전자 스위치 유닛(16)을 스위칭 온/오프 함으로써 상이한 극성 및 상이한 크기의 전류 펄스를 교번하여 공급받을 수 있고, 각각의 제 1 스위치 유닛(16)은 제 1 스위칭 트랜지스터(18, 19)의 특정한, 특히, 동일한 수를 갖고, 각각은 실질적으로 동일한 온-상태 저항값(R)을 각각 가지며, 제 1 스위치 유닛의 저항은 상기 제 1 스위칭 트랜지스터(18, 19) 중 하나만 사용함으로써 또는 병렬로 연결된 복수의 제 1 스위칭 트랜지스터(18, 19)를 사용하여 서로 조절되며, 상기 제 1 스위치 유닛(16)은 특정 시간적 스키마에 따라 그리고 상기 제어 시간 간격에 대한 미리결정된 길이에 의해 순차적으로 제어된다. The present invention relates to a method of operating a UWB device having at least one transmit antenna and / or at least one receive antenna. The method comprises the steps of: applying a control pulse signal (13, 13 ') having a sequence of substantially sinusoidal waves of different polarity and a different amplitude and in particular with a fifth order Gaussian pulse signal to the transmit antenna (12) , Wherein the transmit antenna (12) is switched on / off by switching the first electronic switch unit (16) coupled to the transmit antenna (12) and having a resistance associated with the amplitude of the pulse to be generated Current pulses of different polarities and different sizes can be alternately supplied and each first switch unit 16 has a specific, particularly the same number of, first switching transistors 18, 19, State resistance value R, and the resistance of the first switch unit is determined by using only one of the first switching transistors 18, 19 or a plurality of first switching transistors 18 and 19 are each controlled by using the first switch unit 16 is controlled in accordance with a particular schema and temporal sequence by a predetermined length for the control time interval.

Measurement of bladed rotors

Machine tool monitoring device

The invention is based on a machine tool monitoring device with a detecting unit (24) for detecting a use situation (66, 80) in a machine tool (10), wherein the detecting unit (24) makes it possible to determine the position and/or speed of human or animal tissue. It is proposed that the machine tool monitoring device has at least one ultra wide band radar sensor (26, 28, 30). Furthermore, the invention relates to a machine tool with such a machine tool monitoring device.

Level measuring device that operates using microwaves

Coherent radar detection using non-coherent architecture

In a radar system having a transmitter that produces pulses to be radiated by an antenna and a receiver that detects target information, complex demodulation is performed on an attenuated and limited waveform of the transmitter produced pulse. A matched filter is generated responsive to the complex demodulated waveform that is a time reversed conjugate image of the waveform corresponding to the produced pulse. Complex demodulation is performed on the return signal received by the receiver corresponding the produced pulse and the complex demodulated return signal is correlated with the matched filter that corresponds to the time reversed conjugate image of the waveform of the produced pulse.

Pulse radar device

The objective of the present invention is to use a simple circuit configuration and simple signal processing to provide a pulse radar device with which it is possible to reduce the impact of local signal carrier leaks on a received signal, and which makes it possible to perform high precision angle measurement using a multi-beam system. In order to measure the angle of a target object, a pulse radar device (100) is provided with at least two reception antennas (121a to 121d), and a reception circuit (120) is provided with a signal change-over switch (123) for selectively switching between received signals received by the reception antennas (121a to 121d). The received signal contains a local signal leak component, and a DC level of the received signal varies concomitant with the switching of the signal change-over switch (123). In order to eliminate the impact of such DC level variations, high-pass filters (130a and 130b) are disposed between a mixer (125) and a frequency analyzer (126).

Radar equipment

System and method for sensing distance and/or movement using communication overlay

A method for measuring a separation distance to a target object using a communication signal includes transmitting from a first device, via a transmitter of the first device, a communication signal including a first bit pattern encoded therein. The method also includes receiving, via a processor on the first device, a copy of the communication signal prior to encoding and receiving, via a receiver of the first device, an echo based on the transmitted communication signal. The received echo is decoded and the method includes identifying, via the processor, the first bit pattern in the copy of the communication signal and identifying, via the processor, the first bit pattern in the decoded echo. Then the method determines, via the processor, a time of flight of the first bit pattern based on identifying the first bit pattern in each of the copy of the transmitted communication signal and in the received echo, and performs, via the processor, an action based on the determined time of flight.

Dual polarization radar apparatus and interference judgment method

According to one embodiment, a dual polarization radar apparatus includes a received power calculation unit (172, 174) configured to calculate a horizontal polarization received power and a vertical polarization received power, the horizontal polarization received power indicating a power value of a horizontal polarization received signal reflected from an observation target, the vertical polarization received power indicating a power value of a vertical polarization received signal reflected from the observation target, a power ratio calculation unit (175) configured to calculate a power ratio between the horizontal polarization received power and the vertical polarization received power, and an interference judgment unit (175) configured to judge that an interference signal is mixed to the horizontal polarization received signal or the vertical polarization received signal when the power ratio is greater than a predetermined threshold value.

Computerised radar process for measuring distances and relative speeds between a vehicle and obstacles located in front of it

A vehicle radar emits four groups of single-frequency stepped radar pulses. In group A, the frequency of each pulse is a fixed amount higher than that of the preceding pulse. In group B, the frequency of each pulse is a fixed amount lower than that of the preceding pulse. In group C, the frequency of each pulse is the same as that of the preceding pulse. In group D, the frequency of each pulse depends on a modulo algorithm. The signals reflected from other vehicles may readily be processed with inexpensive equipment to discriminate among such other vehicles, and to determine the distance to, and relative speed of, each such vehicle.

Pulse compression radar system for automotive and other commercial applications

基于雷达的传感器检测系统包括操作用于在输出端提供连续波信号的微波源(10)。脉冲形成器(13)被耦合到该源的输出端并操作用于在输出端提供根据目标检测的距离增加雷达系统的发射能量的可变长度脉冲。调制器(16)被耦合到脉冲形成器的输出端用以提供调制脉冲信号。被耦合到调制器输出端的发送接收开关(18)可选择地操作于第一发送位置和第二接收位置之间。当开关操作在发送位置时，被耦合到发送接收开关的发送信道(25，26，30)发送脉冲信号。当开关操作在接收位置时，被耦合到发送接收开关的接收信道接收调制器信号。第一和第二倍压器(44，45)的每一个具有用于接收在接收位置的调制器信号的本地振荡器输入端，并且每一个具有输入信号端口和输出端口。接收器信道(40，41，31)从输出端接收被反射的发送信号，且将接收信号施加到倍压器的接收信号输入端口上。被耦合到倍压器的输出端口的自相关器(47，55)相关接收信号以生成表示目标的检测及位置的输出信号。

Computerized radar method for measuring distances and relative speeds between a vehicle and obstacles in front of it

Pulse radar device and control method therefor