СПОСОБ ОПРЕДЕЛЕНИЯ УРОВНЯ ЗАПОЛНЕНИЯ ПУТЕМ ПЕРЕДАЧИ СИГНАЛОВ С РАЗЛИЧНЫМ ШАГОМ ИЗМЕНЕНИЯ ЧАСТОТЫ

Radarsensor für Kraftfahrzeuge

Radarsensor für Kraftfahrzeuge, mit einem Signalgenerator, der dazu konfiguriert ist, ein Radarsignal zu erzeugen, das eine sich zyklisch wiederholende Folge von N Wellenzügen W, j = 1, ..., N enthält, die aufeinanderfolgend in zeitlichen Abständen T‘gesendet werden und die jeweilige Frequenzbänder belegen, die sich in ihren Mittenfrequenzen fvoneinander unterscheiden, dadurch gekennzeichnet, dass für die die zeitlichen Abstände T‘und die Mittenfrequenzen f,die Beziehung:mit einem konstanten Parameter X gilt.

Verfahren zum Betrieb eines Radarsensors in einem Kraftfahrzeug, Radarsensor und Kraftfahrzeug

Verfahren zum Betrieb eines Radarsensors (1) in einem Kraftfahrzeug (21), wobei der Radarsensor (1) wenigstens eine Antennenanordnung (3) zum Aussenden und Empfangen von Radarsignalen und eine Verarbeitungseinrichtung (8) zum Auswerten empfangener Radarsignale aufweist, wobei die Antennenanordnung (3) zum gleichzeitigen Aussenden und Empfangen von Radarsignalen sowohl in einem Fern-Frequenzbereich (17) als auch in einem Nah-Frequenzbereich (18), wobei die Bandbreite des Nah-Frequenzbereichs (18) größer ist als die des Fern-Frequenzbereichs (17), angesteuert wird, wonach empfangene Radarsignale des Nah-Frequenzbereichs (18) zu Radardaten einer höheren Entfernungsauflösung und empfangene Radarsignale des Fern-Frequenzbereichs (17) zu Radardaten einer niedrigeren Entfernungsauflösung ausgewertet werden.

Verfahren und Vorrichtung zum Erfassen der Umgebung auf der Grundlage von frequenzmoduliertem Dauerstrichradar

Es werden ein Verfahren und eine Vorrichtung zum Erfassen einer Umgebung auf der Grundlage eines frequenzmodulierten Dauerstrichradars (FMCW) offenbart. Das Verfahren zum Erfassen eines Ziels auf der Grundlage eines FMCW-Radars enthält die Schritte: das FMCW-Radar sendet ein Erfassungssignal für die Erfassung des Ziels und empfängt ein Antwortsignal als Antwort auf das Erfassungssignal; das FMCW-Radar führt eine Signalverarbeitung bei dem Antwortsignal durch und erzeugt ein Frequenzspektrum eines Schwebungssignals; das FMCW-Radar bestimmt ein Erfassungsfrequenzband für die Erfassung des Ziels innerhalb eines gültigen Frequenzbands des Frequenzspektrums; das FMCW-Radar bestimmt einen Schwellenwert zum Bestimmen eines Zielerfassungsspitzenwerts für die Erfassung des Ziels unter Spitzenwerten des Frequenzspektrums; und das FMCW-Radar erfasst das Ziel auf der Grundlage des Erfassungsfrequenzbands und des Schwellenwerts.

Verfahren und Radarvorrichtung zum Erfassen eines Zielobjekts

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Erfassen eines Zielobjekts durch eine Radarvorrichtung und auf eine Vorrichtung dafür, und insbesondere bezieht sich die vorliegende Erfindung auf eine Vorrichtung und ein Verfahren zum Verhindern der Verschlechterung einer Leistung durch eine Signalverarbeitungstechnologie, indem eine Situation erkannt wird, in der die Erfassungsleistung eines Radar verschlechtert wird, zum Beispiel in einem Stahltunnel. Die Radarvorrichtung weist Folgendes auf: eine Signalsendeeinheit, die ein Sendesignal für das Erfassen eines Zielobjekts sendet; eine Signalempfangseinheit, die ein Empfangssignal empfängt, das erzeugt wird, wenn das Sendesignal reflektiert wird; eine Ermittlungseinheit, die ein Vorhandensein einer Clutter-Struktur unter Verwendung von Frequenzganginformationen ermittelt; und eine Zielerfassungseinheit, die einen Erfassungsschwellenwert für das Erfassen eines Zielobjekts entsprechend dem Ermittlungsergebnis in Bezug auf das ...

RADARSYSTE M MIT INTERNER RAMPENLINEARITÄTSMESSUNGSFÄHIGKEIT

Eine Phasenregelschleife (PLL) für ein Radarsystem umfasst einen Oszillator, der ausgebildet ist, um eine Ausgangsfrequenz aufzuweisen, und einen Multi-Modulus-Teiler (MMD), der ausgebildet ist, um aufeinanderfolgende Frequenzmodulationsrampen der Oszillator-Ausgangsfrequenz zu implementieren, wobei jede Frequenzmodulationsrampe bei einer ersten Frequenz beginnt und bei einer zweiten Frequenz endet. Die PLL wird durch ein Abwärtsmischen einer Ausgangssignals des Multi-Modulus-Teilers zu einer Frequenz über null Hertz, Messen der abwärtsgemischten Ausgangssignals des Multi-Modulus-Teilers, um eine Mehrzahl von Multi-Modulus-Teiler-Ausgangssignalmessungen für jede Frequenzmodulationsrampe zu erzeugen, und Berechnen der Frequenz des Multi-Modulus-Teilers basierend auf der Mehrzahl von Multi-Modulus-Teiler--Ausgangssignalmessungen für jede Frequenzmodulationsrampe betrieben.

Radar mit frequenzmodulierten, kontinuierlichen Wellen

Verfahren und Vorrichtung zu Abstands- und Relativgeschwindigkeitsmessung mehrerer Objekte

Verfahren und Vorrichtung zur Abstands- und Relativgeschwindigkeitsmessung von mehreren Objekten mittels eines FMCW-Radars, indem Sendesignale mit zeitlich linearen Rampensteigungen abgestrahlt werden und die an Objekten reflektierten Empfangssignale empfangen werden und mit den Sendesignalen gemischt werden. Den Mischerausgangsfrequenzen einer jeden Frequenzrampe für jedes Objekt wird eine Kombination von Abstands- und Relativgeschwindigkeitswerten zugeordnet und aus Schnittpunkten mehrerer Abstands- und Relativgeschwindigkeitskombinationen der Abstand und die Relativgeschwindigkeit eines möglichen Objekts bestimmt, wobei die möglichen Objekte infolge von Mehrdeutigkeiten Scheinobjekte oder reale Objekte sein können. Die Scheinobjekte infolge der Mehrdeutigkeiten werden eliminiert, indem in einem darauf folgenden Messzyklus die Frequenzsteigung mindestens einer Frequenzrampe nach dem Zufallsprinzip geändert wird.

Transpondersystem und Verfahren zur Entfernungsmessung

Die Erfindung bezieht sich auf ein Entfernungs-Bestimmungssystem zum Bestimmen der Entfernung zwischen einer Basisstation (BS) und einem Transponder (TR), wobei die Basisstation (BS) eine oszillierende Signalquelle (OSZ¶B¶) zum Erzeugen eines Signals (S¶tx¶(t)) und eine Sendeeinrichtung (ANT¶B¶) zum Aussenden des Signals (S¶tx¶(t)) aufweist, der Transponder (TR) eine Empfangseinrichtung (ANT¶T¶) zum Empfangen des Signals (e¶rxt¶(t)) von der Basisstation (BS), einen Oszillator (OSZ¶T¶) zum Erzeugen eines dazu phasenkohärenten Signals (S¶OSZ¶(t)) und eine Sendeeinrichtung (ANT¶T¶) zum Aussenden des phasenkohärenten Signals (S¶OSZ¶(t)) aufweist und die Basisstation (BS) außerdem eine Empfangseinrichtung (ANT¶B¶) zum Empfang des phasenkohärenten Signals (S¶OSZ¶(t)) von dem Transponder (TR) und eine Entfernungs-Bestimmungseinrichtung (RXMIX, FLT, DEMOD) zum Bestimmen der Entfernung (dist) zwischen Basisstation (BS) und Transponder (TR) aufweist. DOLLAR A Zur Verbesserung des Systems und der ...

Continuous wave radar receiver and apparatus

A continuous wave radar, particularly a frequency modulated continuous wave radar (FMCW), in which a radar return signal (fr) is frequency down-converted to form a beat frequency (fb) using the transmitter signal which is currently being transmitted. High amplitude spurious interfering signals are eliminated from the beat frequency signal by passing the beat frequency(fb) through a band pass filter (38). The filtered signal is linearly amplified in a limiting amplifier (42) which clips the high amplitude spurious signals at a level greater than the maximum anticipated return signal. The high amplitude spurious signals are detected using a comparator (44) and are used to provide a control signal for actuating a normally closed switch (52) of a sample and hold circuit (50) or of a blanking circuit to eliminate the high amplitude spurious signals present at the switch 52. The signal is thereafter low pass filtered (60) and the resulting signal is digitised and applied to a Fast Fourier Transformer ...

Observation device, observation method, and program

... [Problem] In radar observation and the like, to enable extraction of an actual radio wave source to make it possible to distinguish the same from information that is not an actual radio wave source, even if the signal-to-noise ratio is not sufficiently high. [Solution] A signal processing unit 15 performs a Fourier transform in an azimuth angle frequency domain of a distribution function of a received electric field signal from an antenna in which a beam is scanned within a prescribed azimuth angle, on the basis of the received electric field signal and an azimuth angle signal of the scanned beam, divides a signal resulting from a Fourier transformed first spectral function by a signal resulting from a second spectral function obtained by performing a Fourier transform in the azimuth angle frequency domain of an antenna pattern of the antenna, and uses Prony's method to fit the divided signal to parameters using an exponential function including a real part and an imaginary part.

Method and appaaratus for digital signal processing of a multichannel radar

Improvements in or relating to threat classification

Improvements in or relating to threat classification

Radar device

PROCEDURE FOR THE DETERMINATION OF THE LENGTH OF AN OBJECT OF MEANS RADAR

COHERENTLY FREQUENCY-MODULATED DAUERSTRICH-RADAR

DISTURBANCE AVOIDANCE SYSTEM FOR VEHICLE RADAR SYSTEM

Radar apparatus

Technique for compensation of transmit leakage in radar receiver

FORWARD-LOOKING RADAR SYSTEM

METHOD FOR DETERMINING THE DISTANCE AND SPEED OF AN OBJECT

The invention relates to a method for determining the distance and radial speed of an object relative to a measurement location, wherein the method comprises the following steps: a) emitting first transmission signals, which are radar radiation in the form of first frequency ramps, b) emitting second transmission signals, which are radar radiation in the form of second frequency ramps, wherein the second frequency ramps are different from the first frequency ramps, c) receiving reception signals, which are first and second transmission signals reflected at the object, d) mixing the reception signals with the first or second transmission signals to form mixed signals, e) creating a range-doppler matrix from the mixed signals, f) detecting two doppler frequencies, which originate from the radial speed of the object, and g) evaluating the doppler frequencies and/or phase information of the mixed signals so that the ambiguities when determining the radial speed are remedied, the first transmission ...

METHOD FOR THE MULTIPATH PASSIVE RADAR PROCESSING OF AN FM OPPORTUNITY SIGNAL

The invention pertains to the field of passive radars and more particular ly to the processing of signals exploited by such radars. The method for pro cessing the received signal according to the invention carries out coherent processing operations for ridding the useful signal from parasitic signals ( mainly the reference signal and its multiple reflections), for regenerating the transmission signal and for carrying out a coherent integration of the r eceived signal by calculating the crossed ambiguity between the received sig nal and the regenerated transmission signal. The method also carries out non -coherent processing operations in particular for realising and distance-Dop pler extraction and purification operations for forming blips and removing t he parasitic blips present among the formed blips. The invention is essentia lly intended for passive radars operating on non co-operative opportunity tr ansmissions, such as FM transmissions for the general public.

Radar of FM-CW system

In a radar of FM-CW system having a transmitting and a receiving unit 20 and 28 both connected to a transmitting/receiving antenna 26 via a circulator 24, a high frequency switch 22 for transmission, is inserted and turns on and off the path between the transmitting unit 20 and the circulator 24, and in the receiving operation of the receiving unit 28 the high frequency switch 22 for transmission is controlled according to a switch control signal 320a provided from a signal processing unit 30 such as to be held "off" to hold the transmission output of the transmitting unit 20 "off" for a predetermined time, thus reducing sneak noise component between the transmission and reception. Thus it makes possible to reduce sneak noise between the transmission and reception, and readily realize cost reduction without need of separate antennas for the transmission and reception.

Police traffic radar using absolute signal strength information to improve target signal processing accuracy

A police radar utilizing digital data transmission from the antenna unit to a separately housed counting and display unit. The antenna has a double balanced mixer to suppress even order harmonics. The counting and display unit has a computer programmed to perform digital signal processing on the digital data received from the antenna to improve the quality and accuracy of calculated speeds for patrol speed, strongest target speed and fastest target speed. Fastest target speed can be displayed simultaneously with strongest target speed. Signal processing techniques are used to suppress false signals caused by double and triple bounce, harmonics, intermodulation products, video display terminal interference, etc.

System and technique for mounting a radar system on a vehicle

A system and technique for mounting a radar to a vehicle provides a mounting that does not interfere with the aesthetic appearance of a vehicle, that does not interfere with the aerodynamic performance of the vehicle, and offers optimal radar transmission efficiency. The vehicle can be an automobile or any other vehicle to which a radar system is applied.

RADAR SIGNAL PROCESSING DEVICE AND RADAR SYSTEM

First voltage data (V11 to V1n) and second voltage data (V21 to V2n) each correspond to ranges of the same transmitted signals (T1 to Tn) that have different modulation center frequencies. A speed calculating unit (50) calculates a moving speed of a radio-wave-reflecting object by calculating a reference speed (Sref) which is based on a difference value between the modulation center frequency (Fc_1) of the range of the transmitted signals (T1 to Tn) corresponding to the first voltage data (V11 to V1n) and the modulation center frequency (Fc_2) of the range of the transmitted signals (T1 to Tn) corresponding to the second voltage data (V21 to V2n), and comparing a plurality of speed candidates (Scand[m]) with the reference speed (Sref).

ADAPTIVE FILTERING FOR FMCW INTERFERENCE MITIGATION IN PMCW RADAR SYSTEMS

A radar sensing system for a vehicle includes a transmitter and a receiver. The transmitter is configured for installation and use on a vehicle. The transmitter is configured to transmit radio signals. The receiver is configured for installation and use on the vehicle. The receiver is configured to receive radio signals that include (i) the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment, and (ii) other radio signals that include radio signals transmitted by at least one other radar sensing system. The receiver is configured to filter frequency modulated continuous wave (FMCW) radio signals from the received radio signals to produce filtered radio signals. The receiver is further configured to select between (i) the filtered radio signals, and (ii) the received radio signals before filtering. The filtered radio signals are selected when the other radio signals include FMCW radio signals.

Radar apparatus and signal processing method

There is provided a radar apparatus. An extracting unit extracts a peak signal obtained from a difference frequency between a transmitting signal and a receiving signal during a first period in which the frequency of the transmitting signal ascends and a second period in which the frequency descends. A pairing unit pairs the peak signals of the first and second periods based on a predetermined condition. A deriving unit derives target information including a position of a target based on paired data obtained by pairing the peak signals. The pairing unit selects normal-paired data which is paired in a correct combination, from among the plurality of paired data, based on a plurality of parameter values of the peak signals of the first and second periods which are to be paired, and a discrimination function for discriminating true or false of the pairing.

SMARTPHONE-BASED RADAR SYSTEM DETECTING USER GESTURES USING COHERENT MULTI-LOOK RADAR PROCESSING

Techniques and apparatuses are described that implement a smartphone-based radar system capable of detecting user gestures using coherent multi-look radar processing. Different approaches use a multi-look interferometer or a multi-look beamformer to coherently average multiple looks of a distributed target across two or more receive channels according to a window that spans one or more dimensions in time, range, or Doppler frequency. By coherently averaging the multiple looks, a radar system generates radar data with higher gain and less noise. This enables the radar system to achieve higher accuracies and be implemented within a variety of different devices. With these accuracies, the radar system can support a variety of different applications, including gesture recognition or presence detection.

Radar apparatus

A radar apparatus is disclosed which includes: a distance detecting part configured to detect, among plural bins, an existence distance bin in which the target object exists, a direction detecting process executing part configured to execute a process of detecting a direction in which the target object exists, with respect to a distance bin other than the existence distance bin detected by the distance detecting part, among plural bins from which relative distances to the target object can be calculated, if a predetermined criterion is met; an existence area detecting part configured to detect, based on an execution result of the direction detecting process executing part, an area in which the target object exists.

Method and device for generating a modulated continuous-wave radar signal

A method for measuring an elevation angle and/or azimuth angle with an antenna array. Identical transmitted signals that are formed of successive linear-frequency-modulated ramps are transmitted through the transmitting antennas of the antenna array using time division multiplexing, wherein the time division multiplexing is achieved through alternating attenuation of the signals transmitted by the transmitting antennas. Echoes of the transmitted signals are received by the receiving antennas and are down-converted to a baseband and sampled. The down-converted and sampled echoes are transformed by an FFT into a 2D image domain. Phase differences are determined from the image data, and, in order to compensate for a systematic error present because of the lack of separation of the two transmitted signals, an error-compensated elevation angle and/or an error-compensated azimuth angle is determined by means of a compensation.

Radar interference detection

A data processing device and method for detecting interference in a FMCW radar system are described. For each of a plurality of transmitted chirps of the radar system, a high pass filter is applied to a receiver signal of a receiver channel of a radar receiver during an acquisition time corresponding to a transmitted chirp to remove those parts of the receiver signal corresponding to a reflected chirp having a power at the radar receiver greater than the noise power of the radar receiver of the radar system. The receiver signal power is calculated from the high pass filtered receiver signal. The receiver signal power is compared with a threshold noise power based on an estimate of the thermal noise of the radar receiver to determine whether the receiver signal corresponds to an interfered received chirp including interference or a non-interfered received chirp not including interference.

Methods and apparatus to test RADAR integrated circuits

Methods, apparatus, systems and articles of manufacture are disclosed to test RADAR integrated circuits. A radar circuit comprising a local oscillator (LO), a transmitter coupled to the LO and configured to be coupled to a transmission network, a receiver configured to be coupled to the transmission network, and a controller coupled to the LO, the transmitter, and the receiver, the controller to cause the LO to generate a frequency modulated continuous waveform (FMCW), cause the transmitter to modulate the FMCW as a modulated FMCW, cause the transmitter to transmit the modulated FMCW via the transmission network and the receiver to obtain a received FMCW from the transmission network, and in response to obtaining the received FMCW from the receiver, generate a performance characteristic of the radar circuit based on the received FMCW.

Feature enhancement and data augmentation method, and motion detection device thereof

A feature enhancement and data augmentation method for detecting at least one action of at least one tested subject is provided. The feature enhancement and data augmentation method includes obtaining at least one spectrogram; and performing a feature enhancement processing on the at least one spectrogram, to enhance at least one feature corresponding to at least one action in the at least one spectrogram and generate at least one feature enhanced spectrogram. The feature enhancement processing comprises a directional filtering.

APPARATUS, SYSTEM AND METHOD OF RADAR ANTENNA CALIBRATION

СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА ДЛЯ ОБНАРУЖЕНИЯ ЗАТЕНЕНИЯ АНТЕНЫ

... 1. Система транспортного средства для обнаружения затенения антенны, которая включает в себя антенну с подложкой и несколько антенных элементов, размещенных на подложке, и устройство обработки, выполненное с возможностью измерять апертурную функцию в апертуре антенны и определять, затенен ли по крайней мере один из антенных элементов, на основании, по крайней мере отчасти, измеренной апертурной функции.2. Система по п. 1, в которой устройство обработки выполнено с возможностью определять, что по крайней мере один из антенных элементов затенен, если диаграмма направленности излучения, полученная с помощью значения измеренной апертурной функции, искажена.3. Система по п. 1, в которой устройство обработки выполнено с возможностью получать диаграмму направленности излучения с боковыми лепестками с помощью значения измеренной апертурной функции.4. Система по п. 3, в которой устройство обработки выполнено с возможностью определять, затенен ли крайней мере один из антенных элементов, исходя из ...

Doppler Radar Apparatus

Eine Dopplerradarvorrichtung umfasst einen ersten Oszillator 41a zum Erzeugen eines ersten Abtastsignals, um wiederholt einen vorbestimmten Frequenzbereich periodisch abzutasten; einen zweiten Oszillator 41b zum Erzeugen eines zweiten Abtastsignals mit Abtasteigenschaften, die gleich den Abtasteigenschaften des ersten Abtastsignals sind, wobei der zweite Oszillator 41b mit der Abtastung beginnt, bevor der erste Oszillator 41b die Frequenzabtastung beendet; eine Leistungskombinationsschaltung 44 zum Kombinieren der ersten und zweiten Abtastsignale, um ein Sendesignal zu erzeugen; einen Schalter 50 zum Empfangen der ersten und zweiten Abtastsignale als Eingangssignale und zum Schalten eines Ausgangs zwischen den ersten und zweiten Abtastsignalen synchron mit der Zeitsteuerung, wenn die Abtastung mit jeweils den ersten und zweiten Abtastsignalen abgeschlossen ist; und einen Mischer 17 zum Mischen eines Empfangssignals, das von einem Teil des an einem Ziel reflektierten und empfangenen Sendesignals ...

Auswertevorrichtung und Verfahren zum Auswerten zumindest eines Radarsensors

Die Erfindung betrifft eine Auswertevorrichtung (30) für zumindest einen Radarsensor (32) mit einer Elektronikeinrichtung (36), welche dazu ausgelegt ist, Messsignale (34) des Radarsensors (32) auszuwerten, wobei der Radarsensor (32) dazu ausgelegt ist, während seiner Messzyklen Radarsignale (12) auszusenden und von einer Umgebung des Radarsensors (32) reflektierte Radarsignale (14) zu empfangen und den empfangenen reflektierten Radarsignalen (14) entsprechende Signale als Messsignale (34) auszugeben, während der Radarsensor (32) zwischen zwei nachfolgenden Messzyklen für eine vorgegebene Pausenzeit inaktiv bleibt, und wobei die Elektronikeinrichtung (36) dazu ausgelegt ist, eine Fourier-Transformation unter Verwendung von Messsignalen (34) aus mindestens zwei verschiedenen Messzyklen und/oder unter Verwendung von aus den Messsignalen (34) aus mindestens zwei verschiedenen Messzyklen abgeleiteten Auswertesignalen auszuführen. Außerdem betrifft die Erfindung ein korrespondierendes Verfahren ...

Radarsignal-Verarbeitungsvorrichtung und Verfahren zum Messen von Abstand und Geschwindigkeit

Eine Radarsignal-Verarbeitungsvorrichtung hat ein Entfernungstor (17A, 17B) zum Herausziehen von Entfernungstor-Datenfolgen aus einem Speicher (16A, 16B), einen ersten Frequenzextraktionsabschnitt (102A, 102B), der eine Schwebungsfrequenz entsprechend einem Ziel herauszieht, indem eine Frequenzanalyse mittels FFT mit einer geringen Berechnungslast und einer geringen Frequenzmeßgenauigkeit bei allen von dem Entfernungstor herausgezogenen Entfernungstor-Datenfolgen durchgeführt wird, einen zweiten Frequenzextraktionsabschnitt (103A, 103B), welcher eine Schwebungsfrequenz entsprechend dem Ziel herauszieht, indem eine Frequenzanalyse mittels FFT mit einer hohen Berechnungslast und mit einer hohen Frequenzmeßgenauigkeit nur bei der Entfernungstor-Datenfolge durchgeführt wird, aus der eine Schwebungsfrequenz durch den ersten Frequenzextraktionsabschnitt herausgezogen wurde, und einen Abstands- und Geschwindigkeits-Ableitungsabschnitt (19), welcher den relativen Abstand und die relative Geschwindigkeit ...

Radarsystem zur Umfelderfassung eines Kraftfahrzeuges mit Mitteln zur Erkennung von über- oder unterfahrbaren Reflektionspunkten

Radarsystem zur Umfelderfassung eines Kraftfahrzeugs mit - Sendemitteln zur Abstrahlung von Sendesignalen mit einer oder mehreren Sendeantennen, - Empfangsmitteln zum Empfang von an Objekten reflektierten Sendesignalen mit einer oder mehreren Empfangsantennen und - Signalverarbeitungsmitteln zur Prozessierung der empfangenen Signale, dadurch gekennzeichnet, dass - Empfangssignale aus unterschiedlichen Kombinationen von Sende- und Empfangsantennen akquiriert werden, wobei jeder Kombination ein relatives Phasenzentrum zugeordnet ist, welches als Summe der beiden Vektoren von einem Referenzpunkt jeweiligen Empfangsantennen definiert ist, - für eine Elevationsmessfähigkeit die relativen Phasenzentren dieser Kombinationen aus Sende- und Empfangsantennen nicht alle gleiche vertikale Position haben, und - in den Signalverarbeitungsmitteln zur Erkennung von unter- und bzw. oder überfahrbaren insbesondere stationären Objekten ein Maß verwendet wird, welches wenigstens eine Abweichung gegenüber den ...

Radareinrichtung

Eine Radareinrichtung umfasst eine Radarsignal-Ausgabeeinheit (1), die Radarsignale, deren Frequenz sich mit Ablauf von Zeit ändert, in einem uneinheitlichen Wiederholungszeitraum wiederholt ausgibt.

MIMO-Radarsystem

MIMO-Radarsystem mit:- einem Sendearray, das mehrere in einer Winkelauflösungsrichtung in Abstand zueinander angeordnete Sendeantennen aufweist,- einem Empfangsarray, das mehrere in der Winkelauflösungsrichtung in Abstand zueinander angeordnete Empfangsantennen aufweist,- wobei die Antennenabstände in einem der Sende- und Empfangsarrays oberhalb der Nyquist-Grenze für eindeutige Winkelmessungen liegen, jedoch die Antennenabstände in der Kombination der Sende- und Empfangsarrays unterhalb dieser Nyquist-Grenze liegen, und mit- einer Steuer- und Auswerteeinrichtung, die dazu ausgebildet ist, in jedem von mehreren wiederholt ausgeführten Messzyklen Sendesignale gemäß einem periodischen Multiplexschema über das Sendearray zu senden, wobei die zeitliche Abfolge im Multiplexschema so gewählt ist, dass eindeutige Doppler-Messungen möglich sind,- die in einem Messzyklus empfangenen Signale in einen mindestens zweidimensionalen Detektionsraum (44) zu transformieren, in dem eine Dimension Schätzwerte ...

Elektronisch abtastendes Radarsystem

Elektronisch abtastendes Radarsystem mit: – einer Sendeantenne zum freien Aussenden eines Sendesignals bestehend aus einer kontinuierlichen Welle; – einer Empfangsantenne bestehend aus Antennenelementen, die jeweiligen Kanälen entsprechen; – einem Mischer zum Erhalten eines Schwebungssignals durch Mischen eines von jedem der Antennenelemente empfangenen Empfangssignals mit dem Sendesignal; – einem A/D-Wandler zum Gewinnen von Empfangsdaten bestehend aus einer Anzahl N von abgetasteten Daten durch Abtasten des vom Mischer erhaltenen Schwebungssignals mit einer vorbestimmten Abtastfrequenz; und – einem Zielerfassungsabschnitt zum Erfassen eines Abstands zu einem Ziel und/oder einer relativen Geschwindigkeit des Ziels auf der Grundlage der vom A/D-Wandler abgetasteten Empfangsdaten; gekennzeichnet durch: – einen Datenherausschneideteil zum Herausschneiden einer Anzahl (N – M + 1) von Daten, die jeweils aus einer Anzahl M (< N) von abgetasteten Daten fortlaufend im Zeitbereich bestehen, aus ...

Ortung und/oder Klassifikation von Objekten aus Radardaten mit verbesserter Verlässlichkeit bei unterschiedlichen Entfernungen

Verfahren (100) zur Ortung und/oder Klassifikation mindestens eines Objekts (3), wobei ein genutzter Radarsensor (1) mindestens einen Sender (11) und mindestens einen Empfänger (12) für Radarwellen (13, 14) umfasst, mit den Schritten:• das vom Empfänger (12) registrierte Signal (14) wird in eine zwei- oder mehrdimensionale Frequenzdarstellung (15) umgewandelt (110);• mindestens ein Teil (15') der zwei- oder mehrdimensionalen Frequenzdarstellung (15) wird einem künstlichen neuronalen Netzwerk, KNN (4), welches eine Abfolge von Schichten (4a-4c) mit Neuronen umfasst, als Eingabe zugeführt (120), wobei mindestens einer Schicht (4a-4c) des KNN (4) zusätzlich eine Bemaßungsinformation (16) zugeführt wird (125), die die Größe und/oder Absolutposition von in dem Teil (15') der zwei- oder mehrdimensionalen Frequenzdarstellung (15) erfassten Objekten (3) charakterisiert;• die Ortung (31), und/oder die Klassifikation (32), des Objekts (3) wird dem KNN (4) als Ausgabe entnommen (130).Verfahren (200 ...

Radar methods and apparatus

In an FMCW radar, the signals are digitised at a low rate which is the same as, or a relatively low integral multiple of, the frequency modulation repetition rate. In this manner all the higher frequency components are folded back into a single range bin, and processing and memory requirements considerably reduced. The velocity of the moving target can be determined in the usual manner. Despite folding back to a single range bin, the range of a target is determined by splitting the return signal and feeding it into two channels having different frequency responses so that the target signal amplitude is different in the two channels. The amplitude difference is detected and used to determine the range of the target. In another embodiment, the signal is split into two channels digitised at the same digitisation rate but with a preset delay between the two channels. The relative phase difference between the relevant two target signals from the channels is determined thereby to determine the ...

Frequency shift keying radar with ambiguity detection

Doppler radar systems

Radar system for the detection of drones

Systems and methods for detecting symptoms of occupant illness

Method of detecting symptoms of illness, comprising: receiving an image 602, audio data 402 and/or radar data 1102; classifying portions of the image, audio data and/or radar data as indicating an illness symptom, such as a cough or sneeze 610, 408, 1110; determining a location of the recognized symptom utilizing the image data from the image source 612, 412, 1112; and displaying an indicator that a recognized symptom occurred at a location 1508. The audio data may come from a plurality of audio sources and the symptoms’ location 412 determined through triangulation. The RADAR data may be used to detect a person’s vital signs. Where more than one data source is used, fusion of the data may occur prior (1502, Fig. 15) or subsequent to 1602 classifying an activity from the data (1110, Fig. 15; 410, 610, 1110, Fig. 16). Recognised symptoms may be aggregated (summed) over time 1506 to provide a color-coded frequency heat map (500, Fig. 5) indicating the location of the recognised symptoms ( ...

RADAR

Improvements in or relating to threat classification

A system (100) for remote detection of one or more dimensions of a metallic and/or dielectric object (116), comprising: at least one sensor component configured to identify one or more candidate objects (111), a transmission apparatus, including a transmission element (106), configured to direct microwave and/or mm wave radiation, a detection apparatus (108,109) configured to receive radiation from an entity resulting from the transmitted radiation and to generate one or more detection signals in the frequency domain, and a controller (104), the controller being operable to: generate location data for the one or more candidate objects (111) based on data received from the sensor component; cause the transmission apparatus to direct radiation towards a candidate object, cause the transmitted radiation to be continuously swept over a predetermined range of frequencies, perform a transform operation on the detection signals to generate one or more transformed signals, and determine, from one ...

RADAR TARGET DETECTION SYSTEM AND METHOD

A drone detection radar configured to identify, from information present on returns reflected from a target, the presence of a drone, by identification, within Doppler information on the returns, of: i) Doppler signals being characteristic of rotating parts of a motor; ii) Doppler signals being characteristic of rotating parts of a blade; and, by identification from temporal information in the reflected returns: iii) signals being characteristic of flashing of the blade of a drone; wherein the target is assumed to be a drone if signals i, ii, and iii are present above respective predetermined thresholds. The largest return from a drone is often from the body, but this is often filtered by a clutter filter. The identified parameters therefore improve detection ability. The characteristic form of the Doppler signals in some instances allow the body return to be implied, thus providing information as to drone velocity where the velocity is within that part rejected by a clutter filter.

HIGH-PRECISION TIME OF FLIGHT MEASUREMENT SYSTEM

A system and method is disclosed for measuring time of flight to an object. A transmitter transmits an electromagnetic signal and provides a reference signal corresponding to the electromagnetic signal. A receiver receives the electromagnetic signal and provides a response signal corresponding to the received electromagnetic signal. A detection circuit is configured to determine a time of flight between the transmitter and the receiver based upon the reference signal and the response signal.

Processo de tratamento radar passivo multivias de um sinal de oportunidade em fm

A method, a computer program product, an apparatus and a frequency-modulated continuous-wave radar system

A method for producing an interference reduced radar image, the method comprising: receiving a measured sequence of beat signals; identifying one or more interference segments within the measured sequence of beat signals, an interference segment being a segment subject to an interference; doctoring the measured sequence of beat signals by creating a doctored representation of the measured sequence of beat signals in the form of a matrix Y; creating a doctoring mask representing the doctoring of the measured sequence of beat signals, the doctoring mask being a matrix M; and estimating a reconstructed range-doppler image X from Y and M, wherein the reconstructed range-doppler image is a range-doppler image of Y which is deconvolved using M; such that doctoring the measured sequence of beat signals at least partially removes interference effects and estimating a reconstructed range-doppler image at least partially removes image artefacts created by the doctoring.

Radar aygıtı.

Method and device for processing radar signals

An example relates to a method for processing radar signals, wherein said radar signals comprise digitized data received by at least one radar antenna, the method comprising (i) determining FFT results based on the digitized data received; and (ii) storing a first group of the FFT results without a second group of the FFT results.

RADAR SENSOR HEAD FOR A RADAR SYSTEM

A radar sensor head for a radar system, including: at least one transmitting antenna for generating, and at least one receiving antenna for receiving, radar waves; an interface for connecting the radar sensor head to a data lead; and an identification unit for identifying the radar sensor head, a downloading of calibration data of the sensor head to a central control apparatus being initiatable by way of the identification unit.

On-demand multi-scan micro doppler for vehicle

A radar sensing system for a vehicle includes a transmitter, a receiver, a memory, and a processor. The transmitter transmits a radio signal and the receiver receives a reflected radio signal. The processor samples reflected radio signals during a plurality of time slices. The processor produces samples by correlating reflected radio signals to time-delayed replicas of transmitted radio signals. The processor accumulates the time slices into a first radar data cube and stores the first radar data cube in a memory. The processor combines a portion of the first radar data cube with a portion of a previously stored radar data cube. Based at least in part on the combined portions of the radar data cubes, the processor processes a time series that is a time series of the first radar data cube concatenated with a time series from the previously stored radar data cube.

Radar System Having Interleaved Serial Transmitting and Parallel Receiving

A method for the environmental detection of a motor vehicle, comprising the following steps: emitting transmission signals using N2≥2 transmitting antennas, wherein in each case, the considered transmission signals consist of a sequence of NS×NP identical or similar single signals, receiving transmission signals reflected off objects using NE>=2 receiving antennas, and processing the received signals, characterized in that in each case, transmitting is done on only one of the NS transmitting antennas, wherein from single signal to single signal, the transmitting antenna used alternates cyclically, and within each of the NP periods of the cyclical transmitting antenna alternation the temporal progression is at least approximately the same, in order to receive single signals reflected off objects, all considered NE receiving antennas are always used in parallel, each of the NP received single signals are accumulated in proper phase for the NS×NE different combinations of transmitting and ...

Method for the multipath passive radar processing of an FM opportunity signal

A signal processing method performs operations of coherent processing making it possible notably to purge the useful signal of the spurious signals (in particular the reference signal and its multiple reflections), to regenerate the transmission signal and to perform a coherent integration of the signal received by computing the cross-ambiguity between the signal received and the regenerated transmission signal. It also performs operations of non-coherent processing making it possible in particular to carry out extraction and Doppler distance purification operations making it possible to form blips and to eliminate the spurious blips present among the blips formed. The method applies notably to passive radars operating on non-cooperating opportunity transmissions, such as FM transmissions intended for the public.

Radar level gauge

A FMCW radar tank level gauge (14) that measures a level (13) in a tank (10) by obtaining a set of phase shift data points of mixed transmitted waves and received waves. The set of spectral data phase shift values has a received target marker indicating the level. An adaptive set of masking threshold phase shift values corresponding to at least a portion of the spectral data phase shift values are calculated. The adaptive set of masking threshold values are compared with the corresponding spectral data values to identify at least one spectral data value associated with the level. The level of the tank is calculated from at least one spectral data value and the level of the tank is reported.

Noise mitigation in radar systems

A noise-mitigated continuous-wave frequency-modulated radar includes, for example, a transmitter for generating a radar signal, a receiver for receiving a reflected radar signal and comprising a mixer for generating a baseband signal in response to the received radar signal and in response to a local oscillator (LO) signal, and a signal shifter coupled to at least one of the transmitter, LO input of the mixer in the receiver and the baseband signal generated by the mixer. The impact of amplitude noise or phase noise associated with interferers, namely, for example, strong reflections from nearby objects, and electromagnetic coupling from transmit antenna to receive antenna, on the detection of other surrounding objects is reduced by configuring the signal shifter in response to an interferer frequency and phase offset.

METHOD AND DEVICE FOR GENERATING A MODULATED CONTINUOUS-WAVE RADAR SIGNAL

A method for measuring an elevation angle and/or azimuth angle with an antenna array. Identical transmitted signals that are formed of successive linear-frequency-modulated ramps are transmitted through the transmitting antennas of the antenna array using time division multiplexing, wherein the time division multiplexing is achieved through alternating attenuation of the signals transmitted by the transmitting antennas. Echoes of the transmitted signals are received by the receiving antennas and are down-converted to a baseband and sampled. The down-converted and sampled echoes are transformed by an FFT into a 2D image domain. Phase differences are determined from the image data, and, in order to compensate for a systematic error present because of the lack of separation of the two transmitted signals, an error-compensated elevation angle and/or an error-compensated azimuth angle is determined by means of a compensation.

INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING METHOD

Provided is an information processing device including an estimation unit configured to estimate a status by using a neural network. The neural network includes a first complex-valued neural network to which complex data is input, a phase difference computation layer from which phase difference for each element between a plurality of sets with regard to the complex data is output, and a second complex-valued neural network from which complex data is output on the basis of the phase difference.

In phase (I) and quadrature (Q) imbalance estimation in a radar system

A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.

Multi-person vital signs monitoring using millimeter wave (mm-wave) signals

A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return—mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.

ELECTRONIC DEVICE

An electronic device includes transmission antennas, reception antennas, and an electronic component. The transmission antennas each transmit a transmission wave. The reception antennas each receive a reflected wave that is the transmission wave having been reflected. The electronic component outputs respective transmission signals to the transmission antennas and receive respective reception signals from the reception antennas. The electronic component has a first edge where transmission terminals that output the respective transmission signals to the transmission antennas are arranged, and a second edge where reception terminals that receive the respective reception signals from the reception antennas are arranged. At least one of the first edge or the second edge is located obliquely relative to at least one of a direction in which respective feeding points of the transmission antennas are arranged or a direction in which respective feeding points of the reception antennas are arranged ...

A RADAR PROCESSOR

A radar processor for processing a frame of radar data received from one or more targets, the frame of radar data having a carrier frequency and comprising a sequence of codewords with a codeword repetition interval, wherein the carrier frequency and the codeword repetition interval define an unambiguous velocity range, the radar processor configured to: receive the frame of radar data; transform the frame to obtain a velocity data array; apply a correction algorithm to the velocity data array to correct a Doppler shift of the frame to obtain a corrected array, wherein the correction algorithm comprises a set of Doppler correction frequencies corresponding to a set of velocity gates and at least one of the set of Doppler correction frequencies corresponds to a velocity gate outside the unambiguous velocity range; and perform range processing on the corrected array to obtain a range-Doppler map.

A VEHICLE RADAR SYSTEM WAVEFORM

СПОСОБ РАДИОЛОКАЦИОННОГО ИЗМЕРЕНИЯ УРОВНЯ С РАЗДЕЛЕНИЕМ СИГНАЛА

Изобретение относится к радиолокационному измерителю уровня. Техническим результатом является улучшенное функционирование радиолокационного измерителя уровня в условиях влияния узкополосных помех. Предложен способ измерения расстояния до поверхности продукта, содержащегося в резервуаре, нечувствительный к узкополосной помехе. Способ включает операцию (S3), на которой смешивают отраженный сигнал с передаваемым сигналом, формируя сигнал с промежуточной частотой, а также этап, на котором исходя из сигнала с промежуточной частотой определяют искомое расстояние. Этап определения расстояния дополнительно включает операцию (S4), на которой разделяют сигнал с промежуточной частотой на частотные участки, каждый из которых соответствует определенному частотному интервалу передаваемого сигнала, операцию (S5), на которой идентифицируют возмущенные частотные участки как участки, испытавшие влияние узкополосной помехи, и операцию (S6), на которой определяют искомое расстояние, используя частотные участки ...

VIDEOVERSTÄRKER FÜR EINEN RADAREMPFÄNGER

SYSTEM ZUR ERFASSUNG VON NAHELIEGENDEN OBJEKTEN

Radargerät und Verfahren zum Betreiben eines Radargerätes

Die Erfindung betrifft eine ein Radargerät und ein Verfahren zum Betreiben eines Radargerätes, insbesondere ein Verfahren zum Bestimmen einer Funktionsfähigkeit eines Empfangskanals eines Radargerätes, wobei das Radargerät zum Senden und Empfangen eines Signals in einem Frequenzband eingerichtet ist und ein Steuermittel (24), einen Sendezweig (21) mit einem spannungsgesteuerten Oszillator (34) und einer Leistungseinheit zum Erzeugen eines Sendesignals und einer Sendeantenne zum Abstrahlen des Sendesignals, einen Empfangszweig (22) mit mindestens einem Empfangskanal (22a, 22b) zum Empfangen, Verarbeiten und Weiterleiten eines Empfangssignals aufweist, wobei der mindestens eine Empfangskanal (22a, 22b) mindestens eine Empfangsantenne (23a, 23b) und mindestens einen schaltbaren Verstärker (28a, 28b) aufweist, wobei das Steuermittel (24) mit dem Sendezweig (21) und mit dem Empfangszweig (22) verbunden ist und derart eingerichtet ist, den Sendezweig (21) und den Empfangszweig (22) zu steuern ...

ANTENNENVORRICHTUNG, BEWEGBARER KÖRPER UND ZIELBESTIMMUNGSVERFAHREN

Eine Antennenvorrichtung umfasst mehrere Antennenelemente, die jeweils eine Aussendung und/oder einen Empfang von Funkwellen ausführen. Die Abdeckungsbereiche von Hauptkeulen von Strahlungsmustern der mehreren Antennenelemente überlappen einander und die Formen von Nebenkeulen derselben unterscheiden sich zwischen den mehreren Antennenelementen. Mit dieser Konfiguration ist es möglich, das Signal der aus den Abdeckungsbereichen der Hauptkeulen der Antenne kommenden Funkwellen von dem Signal der von außerhalb der Abdeckungsbereiche kommenden Funkwellen zu unterscheiden und dasselbe zu erfassen.

VERFAHREN ZUR STÖRUNGSUNTERDRÜCKUNG IN EINEM FMCW-RADAR

Verfahren und Schaltungsanordnung zur Verbesserung des Stoerabstandes bei einem elektrischen Empfangsgeraet, insbesondere Radargeraet

RADAR-ENTFERNUNGSMESSEINRICHTUNG

Verfahren zum Betrieb eines Radarsystems eines Fahrzeuges

Die Erfindung betrifft ein Verfahren (100) zum Betreiben eines Radarsystems (1) eines Fahrzeuges (2), bei welchem wenigstens ein Radarsensor (10) zur Detektion von Zielen (240) in der Umgebung des Fahrzeuges (2) vorgesehen ist, wobeidie nachfolgenden Schritte durchgeführt werden:- Bereitstellen wenigstens eines zweidimensionalen Spektrums (220), welches für die Detektion des wenigstens einen Radarsensors (10) spezifisch ist,- Durchführen einer Hauptverarbeitung (120) zur Zieltrennung der Ziele (240), bei welcher eine Modellierung auf Grundlage des bereitgestellten wenigstens einen zweidimensionalen Spektrums (220) durch eine Parameterschätzung erfolgt, sodass die Detektion der Ziele (240) erfolgt. Ferner betrifft die Erfindung ein Radarsystem (1) für ein Fahrzeug sowie ein Computerprogrammprodukt.

Mehrfach unterabgetastetes Chirp-Sequence-Radar

Verfahren zur Bestimmung von Abständen (d) und Relativgeschwindigkeiten (v) von Objekten mit einem Radar, bei dem ein rampenförmig frequenzmoduliertes Sendesignal gesendet wird, dessen Modulationsmuster mehrere Sequenzen von Rampen gleicher Rampensteigung aufweist, die abwechselnd aufeinander folgen, wobei die Sequenzen zueinander einen Frequenzversatz (Δf-Δf) und einen Zeitversatz (Δt-Δt) aufweisen; sowie Radarsensor. Basisbandsignale (b) für die einzelnen Rampen werden unterabgetastet und einer 2D-Fouriertransformation unterzogen. Hypothesen für Abstand d und Relativgeschwindigkeit v eines Objekts werden bestimmt anhand alternativer d-v-Beziehungen und anhand periodisch mehrdeutiger Information über v. Ausmaße der Übereinstimmungen Ξ (d,v) einer Phasenbeziehung von Spektralwerten der Spektren mit für die Hypothesen erwarteten Phasenbeziehungen zwischen Spektralwerten a(d,v) der Sequenzen werden ermittelt, und eindeutige Schätzwerte für den Abstand d und die Relativgeschwindigkeit v werden ...

RADAR RECEIVER

Radar device

System employing a direct digital synthesiser

PROCEDURE FOR THE EVALUATION OF DOPPLER SIGNALS OF A MICROWAVE DOPPLER RADAR FOR THE DETERMINATION OF THE SPEED ABOVE GROUND

LEVEL MEASURING RADAR DEVICE

FMCW RADAR PROCEDURE WITH EVALUATION OF THE PHASE OF THE DIFFERENCE SIGNALS

Method of high-resolution distance processing

Method of high-resolution distance processing. 5 The method according to the invention carries out a measurement of the distance from the ground of an aircraft by undertaking the emission of waveforms making it possible to obtain, after demodulation, of the signals received in return and sampling of the demodulated signals at a frequency Fac, two signals EO*(t) and E*(t), taking the form of two frequency ramps, of 10 respective slopes Ko and Ki, of respective passbands Bo and Bi and of respective durations TEo and TE, the N-point FFT spectral analysis of which is carried out. The values of the durations TEo and TE1 as well as those of the passbands Bo and Bi, are defined in such a way as to be able to determine, on the basis of the spectra of the signals EO*(t) and E*(t), a measurement of 15 non-ambiguous distance di covering the maximum distance dmax to be instrumented and an ambiguous distance do exhibiting the desired distance resolution. The distance d to be measured being determined ...

SYSTEM EMPLOYING A DIRECT DIGITAL SYNTHESISER

A DDS based system, such as a radar, includes means for generating a plurality of transmission signals using a DDS, and means for integrating signals derived therefrom, such as received signals. The system further includes means for varying the relative starting phase of the plurality of transmission signals, or adjusting the DDS input clock whilst maintaining similar primary output frequency characteristics of the transmission signals. The approach has the effect of changing the location of unwanted frequency spurs in each of the transmission signals, and hence the effects of these are decreased in the integration process. An improvement in the sensitivity of the system results. Although primarily suited to radar applications the invention may find utility in other systems such as sonar or lidar systems.

Radar apparatus for detecting a distance/velocity

A radar apparatus for detecting a distance/velocity has a transmitting system for transmitting a signal which is frequency-modulated with a modulating signal having a predetermined recurrence frequency, a receiving system for receiving a reflected wave signal, which is the modulated transmission signal transmitted from the transmitting system and reflected by an object, and which mixes the reflected wave signal and the modulated transmission signal from the transmitting system so as to detect a beat wave signal of the reflected wave signal and the modulated transmission signal. The apparatus also includes a high-pass filter for filtering the beat wave signal detected in the receiving system so as to cut off modulation frequency components of the modulated transmission signal with orders that are equal to or lower than a predetermined order, and a distance/velocity calculating unit which calculates the distance to and the relative velocity with respect to the object based on frequency information ...

In-phase (I) and quadrature (Q) imbalance estimation in a radar system

A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.

Frequency shift keying radar with ambiguity detection

A range detection apparatus comprising a transmitter adapted to transmit a microwave signal and a receiver adapted to receive an echo signal reflected from a target which corresponds to a portion of the transmitted signal; a signal generating means adapted to generate a drive signal to be applied to the transmitter to produce the transmitted signal, the signal generator producing a drive signal which includes a first signal frame comprising at least two frequencies and a second signal frame comprising at least two frequencies, the second signal frame differing from the first, and a processor adapted to process the echo signal together with the transmitted signal so as to determine the distance to the target that produced the echo signal. The apparatus may reduce ambiguity in range measurements and is particularly suited for Frequency Shift Key (FSK) radar in automotive, typically adaptive cruise control functions.

Coherent multi-look radar processing

Techniques and apparatuses are described that implement a smartphone-based radar system capable of detecting user gestures using coherent multi-look radar processing. Different approaches use a multi-look interferometer or a multi-look beamformer to coherently average multiple looks of a distributed target across two or more receive channels according to a window that spans one or more dimensions in time, range, or Doppler frequency. By coherently averaging the multiple looks, a radar system generates radar data with higher gain and less noise. This enables the radar system to achieve higher accuracies and be implemented within a variety of different devices. With these accuracies, the radar system can support a variety of different applications, including gesture recognition or presence detection.

Drone detection radar

A drone detection radar can include a plurality of antenna systems, each antenna system being arranged to transmit a signal into an associated sector, and to receive signals reflected from targets in the sector, the sectors collectively forming a monitored volume, and wherein a sub-set of the antenna systems are active at any one time, with the active sub-set of antenna systems being arranged to monitor their respective volumes for a duration sufficient to measure Doppler signals associated with slow moving drones, with the radar being arranged to switch to a different sub-set of antenna systems after each duration, such that the whole volume is monitored within a predetermined period. Combining a staring array from an antenna system with a plurality of switched antenna system allows drones to be both detected and tracked, with appropriate selection of the predetermined period.

Method and device for processing radar signals

A device for processing radar signals is suggested, said device comprising a DMA engine, a buffer and a processing stage, wherein the DMA engine is arranged for conducting a read access to a memory, wherein such read access comprises at least two data entries, and for filling the buffer by resorting the at least two data entries, wherein the processing stage is arranged for processing the data stored in the buffer.

IN PHASE (I) AND QUADRATURE (Q) IMBALANCE ESTIMATION IN A RADAR SYSTEM

A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.

DNN-Based Human Face Classification

Extracting target information from signals of a radar and measurement environments, including: transmitting frequency-modulated continuous wave transmit signal using the radar; receiving reflected signal reflected from a human face at multiple antenna elements; multiplying the transmit signal with the reflected signal using a mixer to produce a mixed signal; passing the mixed signal through a low pass filter to produce a baseband signal including sinusoidal signals; extracting a frequency of each sinusoidal signal from the baseband signal to produce extracted frequencies; and measuring a distance between the human face and the radar using the extracted frequencies.

METHOD FOR OPERATING A VEHICLE RADAR SYSTEM

A method is provided of operating a vehicle radar system in which at least one radar sensor is arranged for detecting targets in the surroundings of the vehicle. At least one two-dimensional spectrum is provided which is specific for detecting the at least one radar sensor. A main processing step is then performed for target separation in which modeling on the basis of the at least one provided two-dimensional spectrum is performed by means of parameter estimation such that the targets are detected.

ELECTRONIC DEVICE, CONTROL METHOD OF ELECTRONIC DEVICE AND CONTROL PROGRAM OF ELECTRONIC DEVICE

Provided is an electronic device configured to transmit, as a transmission wave, a radio wave whose frequency changes over time from a plurality of transmitting antennas. The electronic device includes a phase controller. The phase controller controls a phase of at least one of transmission waves transmitted from a plurality of transmitting antennas so that the phases of respective transmission waves transmitted from the transmitting antennas are aligned in a predetermined direction. Further, the phase controller adjusts the phase of at least one of transmission waves on the basis of a frequency of the transmission wave.

Signal processing apparatus, radar apparatus, and signal processing method

Provided is a signal processing apparatus configured to calculate an angle of a detection point corresponding to an object on the basis of received signals of a plurality of array antennas. A beat signal is generated by a difference between a transmitted signal and a received signal. Digital data is derived through AD conversion of the beat signal. The digital data is divided into a plurality of data groups. A fast Fourier transform is performed on the data groups to acquire a plurality of transformed data corresponding to the number of the data groups. The transformed data are divided into a plurality of sets, correlation matrices for the respective sets are acquired, and an average value of the correlation matrices is calculated. The angle of the detection point is calculated on the basis of the average value of the correlation matrices.

Object Recognition Method and Object Recognition Device

An object recognition method includes generating Doppler spectrogram data according to an echo signal, the echo signal being relating to an object; transforming N sets of time-domain data of the Doppler spectrogram data corresponding to N velocities into N sets of cadence spectrogram data, respectively; combining the N sets of spectrogram data to obtain 1D/2D cadence spectrum data, and acquiring a series of cadence feature from the 1D/2D cadence spectrum data to recognize the object. 1. An object recognition method , comprising:generating Doppler spectrogram data according to an echo signal, wherein the echo signal is associated with an object;transforming N sets of time domain data corresponding to N velocities in the Doppler spectrogram data into N sets of cadence spectrum data, respectively, N being a positive integer;combining the N sets of spectrum data to acquire (one-dimensional/two-dimensional 1D/2D) cadence spectrum data; andacquiring a cadence feature from the 1D/2D cadence spectrum data to recognize the object.2. The object recognition method of claim 1 , wherein generating the Doppler spectrogram data according to the echo signal comprises:performing a preprocessing operation on the echo signal to generate a preprocessed signal; andtransforming the preprocessed signal into the Doppler spectrogram data.3. The object recognition method of claim 2 , wherein transforming the preprocessed signal into the Doppler spectrogram data comprises:performing a short time Fourier transform (STFT) on the preprocessed signal to generate the Doppler spectrogram data.4. The object recognition method of claim 2 , wherein transforming the preprocessed signal into the Doppler spectrogram data comprises:performing a wavelet transform on the preprocessed signal to generate the Doppler spectrogram data.5. The object recognition method of claim 1 , wherein the object comprises a primary portion and a secondary portion claim 1 , and acquiring the cadence feature from the 1D/2D ...

Radar device and frequency interference cancellation method thereof

The present invention relates to a radar device and a frequency interference cancellation method thereof, and arranges a configuration comprising: an antenna unit for transmitting a radar transmission signal to a periphery and receiving a signal reflected from a target; an RF unit for generating the transmission signal, converting frequencies of a transmission signal and a reception signal, and amplifying a reception signal; a signal processing unit for generating a control signal to generate the transmission signal and cancelling frequency interference from a reception signal of the RF unit; and a control unit for generating radar detection information by using an output signal of the signal processing unit, and tracking information by accumulating the radar detection information. The present invention enables real time changing of a hopping pattern according to a radar frequency interference environment, thereby achieving operation of the hopping pattern adaptively optimized to the frequency interference environment.

Method for determining at least one object information item of at least one target object which is sensed with a radar system, in particular of a vehicle, radar system and driver assistance system

A method for determining at least one object information item of at least one target object (18) which is sensed with a radar system (12), in particular of a vehicle (10), a radar system (12) and a driver assistance system (20) are described. In the method, transmission signals (32a, 32b) are transmitted into a monitoring range (14) of the radar system (12) with at least one transmitter (26a, 26b). Echoes, which are reflected at the at least one target object (18), of the transmission signals (32a, 32b) are received as received signals (34a, 34b) with at least one receiver (30), and if necessary are converted into a form which can be used by an electronic control and/or evaluation device (28). The received signals (34a, 34b) are subjected to at least one multi-dimensional discrete Fourier transformation. At least one target signal is determined from the result of the at least one Fourier transformation. At least one object information item is determined from the at least one target signal. At the transmitter end, at least one first transmission signal (32a) and at least one second transmission signal (32b) are generated from a frequency-modulated continuous wave signal. The at least one second transmission signal (32b) is encoded by means of phase modulation with respect to the at least one first transmission signal (32a), with the result that an at least temporary signal orthogonality between the at least one first transmission signal (32a) and the at least one second transmission signal (32b) is obtained. The at least one first transmission signal (32a) is emitted with at least one first transmitter (26a), and the at least one second transmission signal (32b) is emitted with at least one second transmitter (26b), simultaneously into the monitoring range (14) of the radar system (12). The at least one second transmission signal (32b) is emitted with regular transmission pauses of a predefined length.

Millimeter wave holographic three-dimensional imaging detection system and method

This invention provides millimeter wave holographic 3D imaging detection system, which comprises: a transmitting antenna configured to transmit a millimeter wave transmitting signal to an object to be detected; a receiving antenna configured to receive an echo signal from the object to be detected; a millimeter wave transceiving module configured to generate the millimeter wave transmitting signal transmitted to the object to be detected and receive and process the echo signal from the receiving antenna; a scanning device configured to support the millimeter wave transceiving module, the transmitting antenna and the receiving antenna, and move the millimeter transceiving module, the transmitting antenna and the receiving antenna along a preset track, so as to scan the object to be detected with millimeter waves; a data gathering and processing module configured to gather and process the echo signal output from the millimeter wave transceiving module to generate a 3D image of the object to be detected; and an image display unit configured to display the 3D image generated by the data gathering and processing module. Besides, this invention also provides a method of millimeter wave holographic 3D imaging detection on an object to be detected using the above system thereof. The technical solution of this invention has the advantages of simple structure, high resolution, short imaging time, and larger field of view.

Object position and movement estimation using radar

A system for estimating a range and a velocity of an object includes a processing device configured to perform, for each return pulse of a return signal including reflections of a radar signal, applying a first Fourier transform to the return pulse to transform the return pulse into a range spectrum and calculate a range intensity value for each of a plurality of range hypotheses, calculating a range variation for each of a plurality of hypothesized Doppler frequency values, and for each hypothesized Doppler frequency value, applying a second Fourier transform to the series of return pulses based on the range intensity values and the range variation. The processing device is further configured to perform outputting range and Doppler frequency data including a range-Doppler intensity value for each range hypothesis and hypothesized Doppler frequency, and estimating a range and a velocity of the object based on the range-Doppler intensity values.

Pipelined fft with localized twiddle

A radar system is provided in accordance with various embodiments herein. The radar system includes a transceiver, an analog to digital converter (ADC), a digital processing unit coupled to the ADC, a control unit coupled to the digital processing unit, and a twiddle factor table. The digital processing unit includes a plurality of fast Fourier transform (FFT) elements and a plurality of memory storage devices coupled to the plurality of FFT elements. The plurality of FFT elements and the plurality of memory storage devices are configured in a pipeline. The control unit is configured to control each of the plurality of FFT elements a predetermined number of times. Each twiddle factor in the twiddle factor table corresponds to an FFT element in the plurality of FFT elements. A pipelined Fast Fourier Transform (FFT) sequence of radix-4 elements is configured in stages and can be operated iteratively.

Signal processing method, radar system, and vehicle

Embodiments of this application disclose a signal processing method, a radar system, and a vehicle. The method is applied to a radar system including an array antenna. The method includes: sequentially transmitting signals according to a first transmission sequence through M transmit antennas, where the first transmission sequence is different from a sequence that is formed by arranging the M transmit antennas based on spatial locations; receiving, through N receive antennas, echo signals that are formed after a target reflects the transmitted signals, where M and N are positive integers, and M is greater than 2; and measuring a parameter of the target based on the echo signals. According to the embodiments of this application, correlation between space and a Doppler phase shift is reduced by changing a switching order of transmit antennas.

RADAR APPARATUS AND RADAR SIGNAL PROCESSING METHOD

A radar apparatus and a radar signal processing method are provided. The radar apparatus includes a plurality of transmitting antennas, a plurality of non-uniformly and linearly deployed receiving antennas, a sensor signal processor configured to calculate target range-Doppler data from signals input from a receiving antenna arrangement according to virtual antennas while sequentially driving the plurality of transmitting antennas, and a target position calculator configured to calculate position data of a target from arrangement mapped data obtained by rearranging the virtual antenna-specific range-Doppler data output from the sensor signal processor with reference to antenna configuration related information. 1. A radar apparatus comprising:a memory configured to store antenna configuration related information of an antenna arrangement including a plurality of transmitting antennas and a plurality of receiving antennas, at least one kind of which are non-uniformly and linearly deployed;a sensor signal processor including a range and Doppler processor configured to calculate range-Doppler data from signals input through the plurality of receiving antennas according to virtual antennas while sequentially driving the plurality of transmitting antennas; anda target position calculator configured to calculate position data of a target from arrangement mapped data obtained by rearranging the virtual antenna-specific range-Doppler data calculated by the sensor signal processor according to a two-dimensional arrangement of the virtual antennas with reference to the antenna configuration related is information.2. The radar apparatus of claim 1 , wherein the sensor signal processor further includes a target selector configured to select and output antenna-specific range-Doppler data of one or more targets which are highly likely to be the target from the calculated virtual antenna-specific range-Doppler data.3. The radar apparatus of claim 2 , wherein the target position ...

Method and Device for Extracting Spatial/Velocity Resolution of a Single-Input Single-Output Radar

A method for extracting spatial resolution and/or velocity resolution of a single-input single-output radar acquiring raw radar data with a frequency scanning antenna is provided. The method includes steering a radar beam with the aid of the frequency scanning antenna with respect to an area to be illuminated by the radar, and dividing the area into at least two angular sectors. In this context, the at least two angular sectors are configured in a manner that the at least two angular sectors overlap with respect to each other. 1. A method comprising:steering a radar beam over an angular range;detecting a return signal; andgenerating a first windowed return signal by applying a first angular window function to the return signal, wherein the first angular window function corresponds to a first angular sector of the angular range; andgenerating a second windowed return signal by applying a second angular window function to the return signal, wherein the second angular window function corresponds to a second angular sector of the angular range that overlaps with the first angular sector.2. The method according to claim 1 , wherein steering the radar beam over the angular range comprises varying an oscillation frequency of an input to an antenna.3. The method according to claim 1 , wherein detecting the return signal comprises generating a data slice that includes data associated with the first angular sector and the second angular sector.4. The method according to claim 3 , wherein the data slice comprises a two-dimensional matrix.5. The method according to claim 3 , wherein the data slice represents a coherent processing interval.6. The method according to claim 3 , wherein the data slice comprises a slow-time and fast-time matrix.7. The method according to claim 3 , wherein generating the first windowed return signal comprises applying a frequency transform to the return signal.8. The method according to claim 1 , wherein generating the first windowed return signal ...

Mitigating vibration in a radar system on a moving platform

A method of mitigating vibration in a radar system on a moving platform includes obtaining received signals resulting from reflections of transmitted signals by one or more objects in a field of view of the radar system. The received signals are a three-dimensional data cube. The method also includes processing the received signals to obtain a first three-dimensional map and second three-dimensional map, estimating the vibration based on performing a first detection using the second three-dimensional map, and cancelling the vibration from the first three-dimensional map to obtain a corrected first three-dimensional map. A corrected second three-dimensional map is obtained by further processing the corrected first three-dimensional map; and a second detection is performed using the corrected second three-dimensional map.

METHOD FOR FMCW-BASED DISTANCE MEASUREMENT

Disclosed is a method and a corresponding distance-measuring device for measuring a distance to an object using FMCW radar. The method includes the frequency-dependent determination of the amplitude of the radar signal, i.e. the frequency response in the output path and in the input path of the distance-measuring device. The standard windowing of the evaluation signal can be corrected using a correction factor dependent on the frequency responses. Thus the frequency dependence of the radar signal is compensated independently of device-internal or external interferences by adapting the window function. The result is more accurate and reliable distance measurement using FMCW radar. Because the distance can be determined by the disclosed method very accurately and without distortion, it is advantageous to use the distance-measuring device as a fill-level measuring device to measure the fill level of a filling material in a container.

Sensor and estimating method

A sensor includes circuitry and a memory, wherein the circuitry acquires an N×M first matrix having complex-number transfer function components representing propagation characteristics between a transmit antenna element and a receive antenna element, from N receive signals received by each of M receive antenna elements for a predetermined period. The circuitry extracts a second matrix, corresponding to a predetermined frequency range from the first matrix, representing components influenced by a vital sign, and estimates a position of the organism with respect to the sensor by using the second matrix. The circuitry also calculates a first distance, indicating a distance between the organism and the transmit antenna, and a second distance, indicating a distance between the organism and the receive antenna. The circuitry further calculates a radar cross-section value with respect to the organism, and estimates a posture of the organism.

Multimode Communication and Radar System Resource Allocation

A wireless multimode system includes: an array of N antenna elements that includes a first portion of M antenna elements and a second portion of L antenna elements; M transmission amplifiers configured to transmit, via the M antenna elements, frames of transmit data, where the frames of transmit data include transmit radar signals and transmit communication signals; M reception amplifiers configured to receive, via the M antenna elements, frames of receive data, where the frames of receive data includes receive communication signals; and L reception amplifiers configured to receive, via the L antenna elements, receive radar signals; and a resource scheduler configured to allocate bandwidth for transmit radar signals and transmit communication signals within the frames of transmit data based on one or more predetermined parameters.

WAVEFORM REPORTING FOR COOPERATIVE SENSING

Methods, systems, and devices for wireless communications are described. The method may include receiving, from a network node, a configuration for radar waveform reporting, the radar waveform reporting providing object detection for one or more objects within a detectable range, receiving a radar waveform, and transmitting, to the network node according to the received configuration, a radar reporting message including an indication of one or more parameter values associated with the received radar waveform. 1. A method for wireless communication a user equipment (UE) , comprising:receiving, from a network node, a configuration for radar waveform reporting, the radar waveform reporting for object detection for one or more objects within a detectable range of the UE;receiving a radar waveform; andtransmitting, to the network node according to the received configuration, a radar reporting message comprising an indication of one or more parameter values associated with the received radar waveform.2. The method of claim 1 , further comprising:determining the one or more parameter values based at least in part on receiving the radar waveform; andgenerating a map that maps at least a first parameter value of the one or more parameter values to a second parameter value of the one or more parameter values, wherein the indication of the one or more parameter values associated with the received radar waveform comprises the generated map.3. The method of claim 2 , wherein the one or more parameter values comprise Doppler information claim 2 , incident angle information claim 2 , angular velocity information claim 2 , or range information claim 2 , or a combination thereof claim 2 , for at least one of the one or more objects.4. The method of claim 3 , wherein generating the map comprises:performing a row-wise operation on a first grid that includes subcarrier rows and symbol columns to compute values for Doppler columns; andperforming a column-wise operation on a second grid ...

Frequency modulated continuous wave radar system

A radar system and a method for detecting a target using the radar system. The radar system includes a waveform generator, a plurality of phase shifters, at least one mixer, an analog-to-digital converter, a fast Fourier transform (FFT) processor, and a processor. The waveform generator generates a frequency-modulated continuous wave (FMCW) signal including a set of chirps repeated for a predetermined number of times. The phase shifters shift a phase of each chirp on a transmit branch. The phases transmitted via first and second transmit branches are shifted in accordance with first and second sets of regularly spaced phases, respectively. The first and second sets of regularly spaced phases have first and second phase differences, respectively, that are different from each other. The FFT processor performs FFT processing and the processor determines an angle of direction of the target based on range Doppler map bins.

Phase-modulated continuous wave radar system (with prbs codes)

A phase modulated continuous wave radar system comprising a radar control system utilizing a Pseudo Random Bit Sequence (PRBS) as a long modulation code with simultaneous autocorrelation and cross-correlation interference resistance. the transmitter is co-sited with the receiver, the receiver can be given prior knowledge of the specific transmitted code that it is correlating to. This prior knowledge, which is not accessible in general to bi-static systems such as GPS and cell phone technology, allows for increased randomization of cyclic code structures in monostatic radar systems.

RADAR SYSTEM AND CONTROL METHOD THEREFOR

A radar system and control method thereof is disclosed. The radar system comprises a plurality of radar units, each comprising: one or more radio frequency (RF) channels configured to receive a reflected signal and then generate an analog input signal according to the reflected signal; and a processing module connected with all the RF channels and configured to sample the analog input signal to obtain a digital signal and perform the first digital signal processing on the digital signal to obtain intermediate data, wherein when the plurality of radar units work jointly, a designated radar unit performs the second digital signal processing on the plurality of intermediate data provided by the plurality of radar units, thereby obtaining result data of the radar system. 1. A radar system comprising a plurality of radar units , wherein each of the radar units comprises:one or more radio frequency (RF) channels, wherein each of the one or more RF channels is configured to receive a signal and generate an analog input signal according to the received signal;a processing module coupled to the one or more RF channels, wherein the processing module is configured to sample the analog input signal to obtain a digital signal and perform a first digital signal processing to the digital signal, thereby obtaining intermediate data,wherein when the plurality of radar units work jointly, a designated radar unit performs a second digital signal processing to a plurality of intermediate data provided by the plurality of radar units, thereby obtaining result data of the radar system.2. The radar system of claim 1 , wherein when each of the radar units works alone claim 1 , the processing module in the respective radar unit performs the second digital signal processing to the respective intermediate data claim 1 , thereby obtaining the result data of the respective radar unit.3. The radar system of claim 1 , wherein in each of the radar units claim 1 , the one or more RF channels ...

Scaling fixed-point fast fourier transforms in radar and sonar applications

Present disclosure describes an improved scaling mechanism for a multi-stage fixed-point FFT algorithm used to process signals received by radar or sonar systems. Proposed scaling includes scaling an output of every pair of consecutive butterfly stages of the FFT algorithm by a scaling factor equal to two times of the inverse of a growth factor for the pair of consecutive butterfly stages for the FFT algorithm for a purely complex exponential input signal. Besides this scaling, input signals are allowed to overflow by saturation. Such mechanism yields adequate performance of radar and sonar receivers implementing fixed-point FFTs for any types of input signals, from random to substantially complex exponential or sinusoidal signals. Proposed scaling achieves a balance between having signal to noise ratio (SNR) that is possible to obtain for a particular input signal and SNR that is needed to successfully process that signal for radar and sonar applications.

Vehicle radar device

A vehicle radar device provided with a transmission and reception unit for generating a beat signal from a transmission signal and a reception signal, a frequency analysis unit for generating a two-dimensional spectrum including a speed component and a distance component by applying prescribed frequency analysis processing to a signal sequence of the beat signal, and a speed determination unit for dividing the speed component of the two-dimensional spectrum into a plurality of blocks, carrying out constant false alarm rate (CFAR) processing on each of the plurality of blocks, and specifying the speed of the vehicle of the radar device on the basis of a threshold obtained through the CFAR processing.

Radar device, signal processing device for radar device, and signal processing method

There is provided a radar device. A Fourier transform unit decomposes each of respective beat signals into a plurality of frequency components. A bearing computing unit specifies arrival angles of reflected-wave signals based on peak frequency components included in the plurality of frequency components, and calculates the signal intensities of arrival angle components of the reflected waves with respect to a plurality of neighborhood frequency components of the peak frequency components when the plurality of arrival angles of the reflected-wave signals are specified. A calculating unit selects one frequency component having the highest signal intensity from among the plurality of neighborhood frequency components, with respect to each of the arrival angles specified at a plurality of frequencies, and computes a distance between the radar device and a target on the basis of the one frequency component selected with respect to each of the arrival angles.

Radar Unit and Method for Operating a Radar Unit

A radar unit and a method for operating a radar unit. The method for includes a step of determining a functionality of a receiving channel in a radar unit, wherein the radar unit is configured for transmitting and receiving a signal in a frequency band, and has a control means, a transmission path with a voltage controlled oscillator and an output unit for generating a transmission signal and a transmission antenna for emitting the transmission signal, and a receiving path with at least one receiving channel for receiving, processing and conveying a received signal, wherein the at least one receiving channel has at least one receiving antenna and at least one switchable amplifier, wherein the control means is connected to the transmission path and to the receiving path, and is configured to be able to control the transmission path and the receiving path, wherein the at least one switchable amplifier of the at least one receiving channel is disposed at the input of the receiving channel and is connected to the receiving antenna.

RADAR APPARATUS

The radar apparatus includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. A transmission delay of the transmission signal is set for a transmission period of the transmission signal. Each of the plurality of transmission antennas is associated with a combination of the Doppler shift amount and the code sequence such that at least one of the Doppler shift amount and the code sequence is different between a plurality of the combinations. A number of multiplexing by the code sequence corresponding to a first Doppler shift amount is different from a number of multiplexing by the code sequence corresponding to a second Doppler shift amount. 1. A radar apparatus , comprising:a plurality of transmission antennas that transmit a transmission signal; anda transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas, whereina transmission delay of the transmission signal is set for a transmission period of the transmission signal,each of the plurality of transmission antennas is associated with each of a plurality of combinations of the Doppler shift amount and the code sequence,each of the plurality of combinations is different at least one of the Doppler shift amount and the code sequence, anda number of multiplexing by the code sequence corresponding to a first Doppler shift amount of a plurality of the Doppler shift amounts is different from a number of multiplexing by the code sequence corresponding to a second Doppler shift amount of the plurality of Doppler shift amounts.2. The radar apparatus ...

Mounting angle learning device

A learning selection unit selects execution of learning by a rapid learning unit at a learning moment if the number of times of learning is less than a number threshold value, and selects execution of learning by an accurate learning unit at the learning moment if the number of times of learning is greater than the number threshold value. The number of times of learning indicates how many times a learned value has been updated by the time learning at the learning moment is started.

Mimo radar measurement sensor

A MIMO FMCW radar sensor and a MIMO time multiplexing method for localizing a radar target, in which an FMCW radar measurement is performed with a transmitted signal whose modulation pattern encompasses, for different transmission switching states that differ in terms of the selection of antenna elements used for transmission, mutually temporally interleaved sequences of ramps; ambiguous values for the relative velocity of the radar target are determined from a position of a peak in a two-dimensional spectrum; phase relationships between spectral values of spectra are checked for agreement with phase relationships expected for several of the determined values of the relative velocity; on the basis thereof, an estimated value for the relative velocity of the radar target is selected from the determined periodic values of the relative velocity; and the angle of the radar target is determined on the basis of amplitudes and/or phase relationships between obtained baseband signals.

RADAR APPARATUS AND DISTANCE MEASUREMENT METHOD

A radar apparatus () of the present embodiment includes a transmitting unit () that transmits a frequency chirp signal whose frequency linearly changes with time, a receiving unit () that receives a reflected wave that is the frequency chirp signal reflected by an object, a mixer () that mixes the transmitted frequency chirp signal and the received reflected wave to obtain a beat signal, a frequency estimation unit () that estimates a frequency of the beat signal, and a distance estimation unit () that estimates a distance to the object based on the frequency of the beat signal. The frequency estimation unit () calculates an autoregressive coefficient of an autoregressive model from a sequence of discrete signal values of the beat signal and estimates the frequency of the beat signal using a base frequency that is based on a pole of the autoregressive model. 1. A radar apparatus comprising:a transmitting unit comprising an antenna and configured to transmit a signal having a constant frequency or a continuous wave signal obtained by modulating the signal;a receiving unit comprising one or more receiving attennas and configured to receive a reflected wave that is the continuous wave signal reflected by an object;a mixer configured to mix the received reflected wave and the continuous wave signal to obtain a beat signal;a frequency estimation unit comprising an analog-digital converter and configured to estimate a frequency of the beat signal; anda distance estimation unit configured to estimate a distance to the object based on the frequency of the beat signal,wherein the frequency estimation unit calculates an autoregressive coefficient of an autoregressive model from a sequence of discrete signal values of the beat signal and estimates the frequency of the beat signal using a base frequency that is based on a pole of the autoregressive model.2. The radar apparatus according to claim 1 , wherein the continuous wave signal is a frequency chirp signal whose frequency ...

Systems for Estimating Three-Dimensional Trajectories of Physical Objects

In implementations of systems for estimating three-dimensional trajectories of physical objects, a computing device implements a three-dimensional trajectory system to receive radar data describing millimeter wavelength radio waves directed within a physical environment using beamforming and reflected from physical objects in the physical environment. The three-dimensional trajectory system generates a cloud of three-dimensional points based on the radar, each of the three-dimensional points corresponds to a reflected millimeter wavelength radio wave within a sliding temporal window. The three-dimensional points are grouped into at least one group based on Euclidean distances between the three-dimensional points within the cloud. The three-dimensional trajectory system generates an indication of a three-dimensional trajectory of a physical object corresponding to the at least one group using a Kalman filter to track a position and a velocity a centroid of the at least one group in three-dimensions.

Devices and methods for adjusting wireless receiver power demand

Methods and apparatus are disclosed for wirelessly receiving power. In one aspect, an apparatus for wirelessly transmitting power to power or charge a wireless power receiver is provided. The apparatus comprises a transmitter circuit configured to transmit wireless power via a magnetic field sufficient to power or charge a load. The apparatus further includes a processor circuit configured to determine a power level capability of the transmitter circuit. The apparatus further includes a communication transceiver circuit configured to transmit a first communication to the wireless power receiver, the first communication including a request to adjust a power demand from a first power level to a second power level, the first power level being higher than the second power level. The second power level is commensurate with the power level capability of the transmitter circuit

Target detection based on curve detection in range-chirp map

A system and method to perform target detection includes transmitting frequency modulated continuous wave (FMCW) pulses as chirps from a radar system. The method also includes receiving reflections resulting from the chirps, and processing the reflections to obtain a range-chirp map for each beam associated with the transmitting. Curve detection is performed on the range-chirp map for each beam, and one or more targets is detected based on the curve detection.

Radar device and signal processing method

A radar device generates pair data items by associating angle peaks of an up section and angle peaks of a down section. Thereafter, on the basis of a plurality of specific pair data items whose positions are close to each other in an angle direction and which are substantially the same in the position in a distance direction intersecting with the angle direction and are substantially the same in relative speed, the radar device derives one representative pair data item. The derivation of one representative pair data item is performed before continuity determination of a continuity determining unit at the same process timing is performed.

Electronic device, method for controlling electronic device, and program

An electronic device includes a transmission antenna that transmits a transmission wave, a reception antenna that receives a reflected wave that is the transmission wave having been reflected, and a control unit that detects a target by using a constant false alarm rate on the basis of a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave. The control unit performs control to skip processing of detecting an object determined to be a stationary object among objects located around the electronic device, as the target by using the constant false alarm rate on the basis of the transmission signal and the reception signal.

A system and method of detecting objects

Object detection systems and methods are provided. An object detection system comprises a plurality of nodes, each node having a transmitter configured to transmit a radar signal as a beam, and one or more receivers configured to receive a reflected radar signal. The nodes and transmitters are arranged such that the radar beam of one transmitter at least partly overlaps with the radar beam from the transmitter at an adjacent one of the nodes. The object detection system comprises a processor configured to receive a digitised signal from each node, process the digitised signal to detect characteristics of any Doppler effects created by the movement of an object through one or more of the radar beams, compare the Doppler characteristics with Doppler signatures associated with known objects, and thereby classify the object.

Direct Wave Suppression Method and System for Microwave Imaging System

Provided are a direct wave suppression method and system for a microwave imaging system. The method includes a series of filtering operations, such as conversion from a frequency domain to a time domain, filtering, conversion from the time domain to the frequency domain, and cancellation subtraction, on an echo signal set composed of echo signals obtained by a vertical linear array antenna at all the equivalent antenna collection positions thereof.

Phase, phase noise, and slave mode measurement for millimeter wave integrated circuits on automatic test equipment

A radar monolithic microwave integrated circuit (MMIC) includes a first transmission channel configured to output a first continuous-wave transmit signal based on a local oscillator signal having a first frequency; a first phase shifter provided on the first transmission channel and configured to apply a first phase setting to the first continuous-wave transmit signal to generate a first transmit signal having the first frequency; a first transmit monitoring signal path configured to couple out a portion of the first transmit signal from the first transmission channel as a first transmit monitoring signal; a frequency multiplier configured to receive a test signal and convert it into a multiplied test signal having a second frequency, where the first and the second frequencies are separated by a frequency offset; and a down-conversion mixer configured to mix the multiplied test signal and the first transmit monitoring signal to generate a first mixer output signal.

Method and Apparatus for Reducing Noise in a Coded Aperture Radar

A method and apparatus for reducing noise in a coded aperture radar system, the coded aperture radar system transmitting signals which occur in sweeps, with K sweeps utilized to cover field of view of the coded aperture radar system and Q frequency shifts or steps occurring each sweep thereof. An array of N antenna elements is provided, the array of antenna elements each having an associated two state modulator coupled therewith. Energy received at the array is modulated according to a sequence of multibit codes, the number of codes in the sequence of codes comprising at least K times Q times N, thereby reducing noise in the coded aperture radar system compared to a coded aperture radar system radar system having fewer than K times Q times N codes in its sequence of multibit codes.

FMCW RADAR, METHOD FOR PROCESSING DIGITAL SIGNALS, AND CHARACTERIZATION INFORMATION DETECTION METHOD

A method for processing digital signals is provided. In the method, a plurality of digital signals corresponding to radar signals received by a receiving terminal are superposed, so as to reduce noise caused by environmental interference. Therefore, according to an output signal obtained after the superposition, accurate characterization information of a to-be-detected object can be obtained. 1. A frequency modulated continuous wave (FMCW) radar , comprising:a transmitter configured to transmit a plurality of chirp signals; anda receiver configured to receive reflected chirp signals, generate a plurality of digital signals corresponding to the chirp signals, superpose the digital signals to obtain an output signal, and calculate characterization information of a to-be-detected object according to the output signal.2. The FMCW radar according to claim 1 , wherein the receiver superposes the digital signals corresponding to the chirp signals in the same frame to obtain the output signal.3. The FMCW radar according to claim 1 , wherein the receiver superposes the digital signals corresponding to the chirp signals in a plurality of adjacent frames to obtain the output signal.4. The FMCW radar according to claim 3 , wherein the receiver aligns the digital signals before superposing the digital signals.5. The FMCW radar according to claim 1 , wherein the transmitter comprises at least one transmitting antenna claim 1 , and the receiver superposes the digital signals corresponding to the chirp signals from the same transmitting antenna.6. The FMCW radar according to claim 5 , wherein the receiver comprises a plurality of receiving antennas claim 5 , and the receiver superposes the digital signals corresponding to the chirp signals received by one of the receiving antennas from the same transmitting antenna to obtain the output signal.7. The FMCW radar according to claim 5 , wherein the receiver comprises a plurality of receiving antennas claim 5 , and the receiver ...

ELECTRONIC DEVICE, METHOD FOR CONTROLLING ELECTRONIC DEVICE, AND PROGRAM

An electronic device includes a transmission antenna that transmits a transmission wave, a reception antenna that receives a reflected wave that is the transmission wave having been reflected, and a control unit that detects a target by using a constant false alarm rate, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave. The control unit sets a test region and at least one or more reference regions with respect to the test region in a distribution of signal intensities based on the reception signal in a distance direction, and sets a threshold for use in detection of the target, based on an order statistic among signal intensities in the reference regions. 1. An electronic device comprising:a transmission antenna that transmits a transmission wave;a reception antenna that receives a reflected wave that is the transmission wave having been reflected; anda control unit that detects a target by using a constant false alarm rate, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave, whereinthe control unit sets a test region and at least one or more reference regions with respect to the test region in a distribution of signal intensities based on the reception signal in a distance direction, and sets a threshold for use in detection of the target, based on an order statistic among signal intensities in the reference regions.2. The electronic device according to claim 1 , wherein the control unit switches between a plurality of patterns including at least one or more patterns in which the reference regions are set on a far side with respect to the test region in the distance direction in the distribution of the signal intensities based on the reception signal in the distance direction and at least one or more patterns in which the reference regions are set on a near side with respect to the test region in the distance direction in ...

Frequency-Modulated Continuous-Wave (FMCW) Radar-Based Detection of Living Objects

The techniques of this disclosure enable frequency-modulated continuous-wave radar-based detection of living objects. Instead of generating a chirp pattern with each chirp separated by an idle period, a radar generates a chirp pattern with multiple chirps separated by an idle period. From applying a Fourier transform to receiver signals for each frame, the radar determines an amplitude as a function of range for each frame. The radar computes the standard deviation between the amplitudes of two frames and then, for each additional frame, the radar incrementally updates the standard deviation to be inclusive of the amplitude contribution of the additional frame. That is, rather than recalculate the standard deviation for each new frame, the radar increments the standard deviation by a fraction of the amplitude for the new frame, which is proportionate to the total quantity of frames generated thus far. In response to the standard deviation satisfying a noise threshold, the radar outputs an indication of a living object. 1. A system comprising a processor configured to:direct a radar system to generate, for a plurality of frames, radar signals having a chirp pattern that has a first period of multiple chirps followed by a second period of idle time, the second period of idle time being longer than the first period of multiple chirps;determine a respective amplitude of reflections of the radar signals as a function of range for each of the plurality of frames;based on the respective amplitude of the reflections for each of the plurality of frames, determine a standard deviation in the respective amplitude for the reflections within each of the plurality of frames; andin response to the standard deviation in the respective amplitude for any of the reflections within the plurality of frames satisfying a noise threshold, output an indication of a living object detected during the plurality of frames.2. The system of claim 1 , wherein:the radar system is integrated in a ...

Range doppler angle detection method and range doppler angle detection device

A range Doppler angle detection method executed by a range Doppler angle detection device includes steps of: receiving a first sensing signal and a second sensing signal; performing 1D Fast Fourier Transform (FFT) and 2D FFT to the first sensing signal for calculating one first 2D FFT map; performing the 1D FFT and the 2D FFT to the second sensing signal for calculating one second 2D FFT map; picking up one column of the first 2D FFT map and one column of the second 2D FFT map according to a given Doppler index; performing the 3D FFT to the picked column of the first 2D FFT map and the picked column of the second 2D FFT map for calculating a range Doppler angle. Therefore, a computation loading of the gesture recognition function can be reduced.

Frequency Modulated Continuous Wave Radar System and Identity and Information Detection Method Thereof

A frequency modulated continuous wave radar system includes at least one identity tag, respectively disposed next to at least one test subject; and a frequency modulated continuous wave radar identity recognition device, including an identity recognition control module, for controlling a test identity tag of the at least one identity tag to be turned on to generate a specific tag reflection signal corresponding to an identity frequency in response to a chirp signal; and a frequency modulated continuous wave radar, for transmitting the chirp signal and receiving at least one reflection signal of the at least one test subject and the specific tag reflection signal in response to the chirp signal, to calculate and determine that the specific tag reflection signal and a specific reflection signal of the at least one reflection signal are corresponding to an adjacent position information. The specific reflection signal is corresponding to test subject information. 1. A frequency modulated continuous wave radar system , comprising:at least one identity tag, respectively disposed next to at least one test subject; and an identity recognition control module, for transmitting a control signal to control a test identity tag of the at least one identity tag to be turned on and to make the test identity tag generate a specific tag reflection signal corresponding to an identity frequency in response to a chirp signal; and', 'a frequency modulated continuous wave radar, for transmitting the chirp signal and receiving at least one reflection signal of the at least one test subject and the specific tag reflection signal in response to the chirp signal, to calculate and determine that the specific tag reflection signal and a specific reflection signal of the at least one reflection signal correspond to an adjacent position information;', 'wherein the specific reflection signal corresponds to a test subject information., 'a frequency modulated continuous wave radar identity ...

Method for lfm radar accuracy improvement without increasing fft length

A method and apparatus for determining a frequency of an echo signal obtained by a radar system is disclosed. The echo signal in response to a source signal of the radar system is received at a receiver. A harmonic oscillator generates a harmonic component signal, and a multiplier multiplies the echo signal with the harmonic component signal to obtain a combined signal. A Fast Fourier Transform (FFT) is performed on the combined signal to obtain a peak in a frequency space, wherein a central frequency of a frequency bin in the frequency space is shifted with respect to the frequency of the echo signal by the harmonic component signal. The frequency of the echo signal is determined from the shifted central frequency.

Method for operating a radar device

A method for operating a radar device, including ascertaining a matrix with time signals of reflected radar radiation, ascertaining elements of a distance-velocity-power matrix of a radar target from the time signals, carrying out a first discrete one-dimensional Fourier transform for the elements of the distance-velocity-power matrix in a first dimension, and carrying out a second discrete one-dimensional Fourier transform for the elements of the distance-velocity-power matrix in a second dimension in such a way that the second discrete one-dimensional Fourier transform is carried out for each second element of the distance-velocity-power matrix in a mathematically defined offset manner.

RADAR DEVICE, OBSERVATION TARGET DETECTING METHOD, AND IN-VEHICLE DEVICE

A radar device includes: a first radar and a second radar to transmit, as radar signals, frequency modulated signals whose frequency gradients with a lapse of time are different from each other and receive reflected waves of the radar signals; a calculation unit to calculate a first frequency spectrum obtained by performing Fourier transform in a distance direction on digital data of a beat signal and a second frequency spectrum obtained by performing Fourier transform in a relative velocity direction on the first frequency spectrum, and calculate distance and velocity information for each radar on the basis of a beat frequency and a Doppler frequency corresponding to a peak value in the second frequency spectrum; and a processing unit to compare the distance and velocity information calculated for each of the radars. 1. A radar device comprising:a plurality of radars each to transmit, as a radar signal, a frequency modulated signal whose frequency linearly changes with a lapse of time, and receive a reflected wave of the radar signal reflected by an observation target; andprocessing circuitryto calculate distance and velocity information indicating a distance to the observation target and a relative velocity with respect to the observation target, by using digital data of a beat signal having a frequency of a difference between a frequency of the radar signal and a frequency of the reflected wave, andto detect the observation target on a basis of the distance and velocity information,whereinthe radars transmit, as radar signals, frequency modulated signals whose frequency gradients with a lapse of time are different from each other, each ratio of absolute values of the frequency gradients being other than 1, andthe processing circuitry calculates a first frequency spectrum obtained by performing Fourier transform in a distance direction on the digital data of the beat signal and a second frequency spectrum obtained by performing Fourier transform in a relative ...

A vehicle radar for environmental detection

A vehicle FMCW Doppler radar system ( 3 ) and related method using transmitter arrangement ( 4 ), a receiver arrangement ( 7 ) and at least one control unit ( 15 ). The radar system ( 3 ) is arranged to transmit signals ( 11 ), to receive reflected signals ( 12 ), and to obtain a plurality of measure results from the received reflected signals ( 12 ) along a main field of view ( 10 ) during at least two radar cycles where each radar cycle including a plurality of FMCW ramps. For each radar cycle, the control unit ( 15 ) is arranged to form a spectrum density map ( 30 ) from measuring points ( 14 ) along the main field of view ( 10 ), where each measure result results in a measuring point ( 14 ). The control unit ( 15 ) is arranged to combine at least two spectrum density maps to form a combined spectrum density map.

Radar level gauge with signal division

A method for providing narrow-band interference unaffected measurement of a distance to a surface of a product kept in a tank, comprising mixing a return signal with a transmit signal to provide an intermediate frequency signal, and determining the distance, based on the intermediate frequency signal. The step of determining the distance further comprises dividing the intermediate frequency signal into a plurality of frequency portions, wherein each frequency portion corresponds to a frequency interval of the transmit signal, identifying disturbed frequency portions as frequency portions affected by narrow-band interference, and determining the distance based on frequency portions being unaffected by narrow-band interference. By dividing the IF-signal into frequency portions corresponding to frequency intervals of the transmit signal, frequency intervals where narrow-band interferences are present may be detected.

Method and system for antenna array calibration for cross-coupling and gain/phase variations in radar systems

A radar system with on-system calibration for cross-coupling and gain/phase variations includes capabilities for radar detection and correction for system impairments to improve detection performance. The radar system is equipped with pluralities of transmit antennas and pluralities of receive antennas. The radar system uses a series of calibration measurements of a known object to estimate the system impairments. A correction is then applied to the beamforming weights to mitigate the effect of these impairments on radar detection. The estimation and correction requires no external measurement equipment and can be computed on the radar system itself.

Object detecting device, object detecting method, object detecting program, and motion control system

An object detecting device includes a signal transmitting and receiving unit configured to generate an intermediate frequency signal based on a transmission signal and a reception signal which is a reflected wave thereof, a processing unit configured to determine that an image of a target peak frequency is a virtual image based on noise when it is determined that a peak frequency of predetermined n times the target peak frequency is not present in information based on the intermediate frequency signal generated by the signal transmitting and receiving unit and to detect an object based on the determination result, where n is an integer of 2 or greater.

Radar system

The disclosure relates to a radar system comprising multiple synchronized transceivers. Example embodiments include a radar system (200, 300) comprising: a plurality of radar transceiver units (202a-c), each configured to operate according to a low frequency clock signal (204), and configured to generate an intermediate frequency signal (407) and a modulated high frequency signal (419) for transmitting and receiving radar signals; and a microcontroller unit (201) configured to provide control signals to each transceiver unit (202a-c) to synchronize operation thereof, wherein each radar transceiver unit (202a-c) is configured to provide received radar data (RX1-N) and a monitoring signal (203a-c) to the microcontroller unit (201), the monitoring signal (203a-c) derived by frequency dividing and combining the modulated high frequency signal and intermediate frequency signal, and wherein the microcontroller unit (201) is configured to derive and compensate for phase and frequency differences between the received radar data (RX1-N) from each transceiver unit (202a-c) based on the monitoring signals (203a-c) provided by each transceiver unit (202a-c).

Method, device and system for processing radar signals

An embodiment relates to a method for processing input data that includes multiplying a portion of the input data with a first set of coefficients or with a second set of coefficients, wherein the first set of coefficients and the second set of coefficients are stored in a memory, wherein the first set of coefficients is used on phase modulated input data and wherein the second set of coefficients is used on input data that are not phase modulated.

Fmcw radar sensor including synchronized high-frequency modules

FMCW radar sensor including multiple high-frequency modules, which are synchronized with one another by a synchronization signal. At least one includes a transmitting part for generating a frequency-modulated transmit signal. At least two high-frequency modules, physically separated from one another, each include a receiving part for receiving a radar echo, each receiving part being assigned a mixer, which generates an intermediate frequency signal by mixing the received signal with a portion of the transmit signal, and an evaluation unit. The evaluation unit is designed to record the intermediate frequency signal over a measuring period as a function of time, and to subject the time signal thus obtained to a Fourier transform. At least one of the evaluation units is designed to window the time signal before the Fourier transform using a complex-valued window function to compensate for a propagation time difference of the synchronization signal between the receiving parts.

Radar device and vehicle velocity correction method

There is provided a radar device. A detection vehicle velocity acquiring unit is configured to acquire a detection vehicle velocity detected on the basis of rotation of a wheel. A relative velocity calculating unit is configured to calculate the relative velocity of a still object. A correction value calculating unit is configured to calculate a first correction value on the basis of the detection vehicle velocity and the relative velocity of the still object obtained in a CW mode and calculate a second correction value on the basis of the detection vehicle velocity and the relative velocity of the still object obtained in a FM-CW mode. A vehicle velocity correcting unit is configured to correct the detection vehicle velocity using at least one of the first correction value and the second correction value.

Non-contact vital-sign monitoring system and method

A non-contact vital-sign monitoring system having a radar disposed in vicinity of a monitored subject includes a data buffer storing output signals of the radar sampled in sequence during a predetermined period; a status classifier determining status of the monitored subject; and a vital-sign detector determining a vital sign of the monitored subject according to the output signals of stationary status.

Conical scan weather radar

A new measurement approach is disclosed that facilitates significantly smaller size, weight, and power (SWaP) spaceborne radar systems that can provide wide swath, high resolution observations. Multiple beams employed in the scan and the complex volume and/or surface backscatter signals of each beam is recorded. Each beam is electronically swept in azimuth where each beam is held at a constant incidence angle over the azimuth sector that covers the swath. Once the sweep is complete, the platform moves forward, by one along track pixel, and the sweep is repeated in order to provide continuous mapping of the volume and surface covered by the swath. Complex volume backscatter is recorded and mapped to each altitude layer to provide full mapping of the atmosphere.

Methods and Apparatus for Velocity Detection in MIMO Radar Including Velocity Ambiguity Resolution

In accordance with described examples, a method determines if a velocity of an object detected by a radar is greater than a maximum velocity by receiving on a plurality of receivers at least one frame of chirps transmitted by at least two transmitters and reflected off of the object. A velocity induced phase shift (φd) in a virtual array vector S of signals received by each receiver corresponding to a sequence of chirps (frame) transmitted by each transmitter is estimated. Phases of each element of virtual array vector S are corrected using φd to generate a corrected virtual array vector Sc. A first Fourier transform is performed on the corrected virtual array vector Sc to generate a corrected virtual array spectrum to detect a signature that indicates that the object has an absolute velocity greater than a maximum velocity.

ANTENNA APPARATUS, MOVABLE BODY, AND TARGET DETERMINATION METHOD

An antenna apparatus includes multiple antenna elements each performing at least one of transmission and reception of radio waves. The coverage areas of main lobes of radiation patterns of the multiple antenna elements are overlapped with each other and the shapes of side lobes thereof are varied among the multiple antenna elements. With this configuration, it is possible to discriminate and acquire the signal of the radio waves coming from the coverage areas of the main lobes of the antenna from the signal of the radio waves coming from the outside of the coverage areas. 1. An antenna apparatus comprising:a plurality of antenna elements, each antenna element configured to transmit and/or receive radio waves; anda plurality of transmission-reception systems, each transmission reception system comprising at least one of the plurality of antenna elements,wherein coverage areas of main lobes of radiation patterns of the plurality of antenna elements overlap each other, and shapes of side lobes of radiation patterns of the plurality of antenna elements are varied among the plurality of antenna elements, andwherein, with respect to one of the plurality of transmission-reception systems, the antenna apparatus is configured to determine whether a transmission-reception signal transmitted or received by the one of the transmission-reception systems is in a coverage area of the main lobe of the at least one antenna element of the one of the transmission-reception systems.2. The antenna apparatus according to claim 1 , wherein each of the plurality of antenna elements comprises a plurality of radiation elements arrayed in a first direction.3. The antenna apparatus according to claim 2 , wherein the plurality of radiation elements are arranged differently in each of the plurality of antenna elements.4. The antenna apparatus according to claim 2 ,wherein the plurality of radiation elements comprise a plurality of conductive patches on a substrate and are configured to resonate ...

Protecting Data Memory in a Signal Processing System

Data memory protection is provided for a signal processing system such as a radar system in which the data memory is protected with a common set of parity bits rather than requiring a set of parity bits for each memory word as in Error Correction Coded (ECC) memories. The common set of parity bits may be updated as memory words in the data memory are accessed as part of signal processing of one or more digital signals. The memory protection ensures that in the absence of memory errors the common parity bits are zero at the end of processing the digital signals as long as each word in the data memory that is used for storing the signal processing data is written and read an equal number of times. 1. An apparatus , comprising:a parity memory component associated with a data memory component enabled to store a plurality of parity bits including a set of group parity bits for each group of memory words of a plurality of groups of memory words in the data memory component; anda parity management component coupled to the parity memory component and enabled to receive an address of a memory word in the data memory component and a data read from or written to the memory word during signal processing, the parity management component configured to update group parity bits in the plurality of parity bits stored in the parity memory component corresponding to the address of the memory word based on the data.2. The apparatus of claim 1 , in which the plurality of groups are non-overlapping groups of memory words in which a single soft error can affect only one memory word per group.3. The apparatus of claim 1 , in which the signal processing is configured to write and read each memory word of a plurality of memory words of the data memory such that for each write of a data to a memory word location (or address or position) of the plurality of memory words claim 1 , group parity bits corresponding to a group of the memory words are updated based on the data and a single read of ...

Detection System and Method of Detecting Life Using Radar

A method of detecting a life includes receiving an echo signal including an in-phase component and a quadrature component, performing a preprocessing procedure on the echo signal to generate a preprocessed signal, generating, according to the preprocessed signal, complex conjugate data associated with the in-phase component and the quadrature component, performing a first time-domain-to-frequency-domain transform on the complex conjugate data to generate Doppler spectrogram data comprising a plurality of positive velocity energies and a plurality of negative velocity energies, generating combined Doppler spectrogram data according to the plurality of positive velocity energies and the plurality of negative velocity energies, performing a second time time-domain-to-frequency-domain transform on the combined Doppler spectrogram data to generate spectrum data, and determining whether a life is detected according to the spectrum data.

Radar apparatus and radar signal processing method

A radar apparatus and a radar signal processing method are provided. The radar apparatus includes a plurality of transmitting antennas, a plurality of non-uniformly and linearly deployed receiving antennas, a sensor signal processor configured to calculate target range-Doppler data from signals input from a receiving antenna arrangement according to virtual antennas while sequentially driving the plurality of transmitting antennas, and a target position calculator configured to calculate position data of a target from arrangement mapped data obtained by rearranging the virtual antenna-specific range-Doppler data output from the sensor signal processor with reference to antenna configuration related information.

Method and system for fmcw radar altimeter system height measurement resolution improvement

A method of improving height measurement resolution for a radar system is provided. The method includes periodically generating, at a FFT processor, a set of FFT bins across a frequency range based on a periodic ramping of a FMCW radar signal from a first frequency to a second frequency; selecting a subset of bins from at least one set of FFT bins by implementing a leading-edge-tracking algorithm by at least one processor; implementing a second algorithm on the selected subset of bins to determine a power ratio between the leading edge tracked bin and the remaining bins in the selected subset of bins to determine an interpolated bin number within the selected subset of bins; and determining an approximate distance to the target based on the interpolated bin number within the selected subset of bins. The sets of FFT bins are indicative of a respective plurality of distances.

Method for detecting radar signals

The present invention concerns a method for processing radar signals in a detection system comprising at least one computing architecture comprising at least one memory to store at least one set of signal-related programs and/or data, at least one processor executing said programs to implement said method comprising at least a first step (E 1 ) to digitize radar signals, a second step to generate spectra from the digitized signals obtained at the first step (E 1 ), via FFT computation, said method being characterized in that FFT computation at the spectra generation step (E 2 ) comprises at least one multi-FFT processing comprising at least: simultaneous FFT computation (E 20 ) of different sizes with automatic selection of said sizes and real-time selection of signals (E 21 ) in all the spectra of the different FFT computations, via a selection algorithm.

Distributed Radar Signal Processing in a Radar System

A cascaded radar system is provided that includes a first radar system-on-a-chip (SOC) operable to perform an initial portion of signal processing for object detection on digital beat signals generated by multiple receive channels of the radar SOC, a second radar SOC operable to perform the initial portion of signal processing for object detection on digital beat signals generated by multiple receive channels in the radar SOC, and a processing unit coupled to the first radar SOC and the second radar SOC to receive results of the initial portion of signal processing from each radar SOC, the processing unit operable to perform a remaining portion of the signal processing for object detection using these results. 1. A system comprising: detect a first beat signal on the first receive channel;', 'generate a first digitized beat signal from the first beat signal;, 'a first radar system-on-a-chip (SOC) comprising a first receiver and first processor, the first processor coupled to the first receiver and configured to detect a second beat signal on the second receive channel; and', 'generate a second digitized beat signal from the second beat signal; and, 'a second radar SOC comprising a second receiver and a second processor, the second processor coupled to the second receiver and configured toa processing unit coupled to the first radar SOC and the second radar SOC, the processing unit configured to perform angle fast Fourier transforms (FFTs) using the first digitized beat signal and the second digitized beat signal.2. The system of claim 1 , wherein:the first processor is configured to compute a first range FFT using the first digitized beat signal; andthe second processor is configured to compute a second range FFT using the second digitized beat signal.3. The system of claim 2 , wherein:the first processor is configured to compute a first Doppler FFT using the first range FFT; andthe second processor is configured to compute a second Doppler FFT using the second ...

METHOD FOR DETERMINING AT LEAST ONE OBJECT INFORMATION ITEM OF AT LEAST ONE TARGET OBJECT WHICH IS SENSED WITH A RADAR SYSTEM, IN PARTICULAR OF A VEHICLE, RADAR SYSTEM AND DRIVER ASSISTANCE SYSTEM

A method for determining at least one object information item of at least one target object () which is sensed with a radar system () of a vehicle (), a radar system () and a driver assistance system () are described. Transmission signals () are transmitted into a monitoring range () of the radar system () with three transmitters (Tx Tx Tx). Echoes, which are reflected at the at least one target object (), of the transmission signals () are received as received signals () with at least two receivers (RxA, RxB, RxC, RxD). The received signals () are subjected to at least one multi-dimensional discrete Fourier transformation. At least one target signal is determined from the result of the Fourier transformation. An object information item is determined from the target signal. 1. A method for determining at least one object information item of at least one target object which is sensed with a radar system of a vehicle , the method comprising:transmitting transmission signals into a monitoring range of the radar system with at least three transmitters;receiving echoes reflected at the at least one target object, of the transmission signals, as received signals with at least two receivers wherein the received signals are converted into a form useable by an electronic control and/or evaluation device;subjecting the received signals to at least one discrete Fourier transformation;determining at least one target signal from the result of the at least one Fourier transformation;determining at least one object information item from the at least one target signal;generating, at the transmitter end, at least one first transmission signal, at least one second transmission signal and at least one third transmission signal from a frequency-modulated continuous wave signal,wherein the at least one second transmission signal and the at least one third transmission signal are encoded by phase modulations with respect to each other and with respect to the at least one first ...

Gesture recognition method, gesture recognition system, and performing device therefore

A performing device of a gesture recognition system executes a performing procedure of a gesture recognition method. The performing procedure includes steps of: receiving a sensing signal; selecting one of sensing frames of the sensing signal; determining a soft label of the selected sensing frame; classifying a gesture event when the soft label of the selected sensing frame is approved. The gesture event is classified to determine the motion of the user. Therefore, the gesture recognition system does not need a predetermined time period to recognize the motion of the user. The time period for recognizing the motion of the user can be dynamical. A total time period for classifying a plurality of motions can be decreased, and the performance of the gesture recognition system can be improved.

SPARSE LINEAR ARRAY APPROACH IN AUTOMOTIVE RADARS USING MATRIX COMPLETION

In an embodiment, a method for completing measurements for a uniform linear array from measurements from a sparse linear array is provided. The method includes: receiving a first set of measurements for a sparse linear array by a computing device; generating a second set of measurements for a uniform linear array from the first set of measurements by the computing device; and using matrix completion to determine values for a plurality of missing elements of the generated second set of measurements for the uniform linear array by the computing device. 1. A method for completing measurements for a uniform linear array from measurements from a sparse linear array comprising:receiving a first set of measurements for a sparse linear array by a computing device;generating a second set of measurements for a uniform linear array from the first set of measurements by the computing device, wherein the second set of measurements has a plurality of missing elements; andusing matrix completion to determine values for the plurality of missing elements of the generated second set of measurements for the uniform linear array by the computing device.2. The method of claim 1 , further comprising estimating a target angle using the generated second set of measurements.3. The method of claim 2 , further comprising providing the estimated target angle to a vehicle navigation system.4. The method of claim 1 , wherein the second set of measurements has more measurements than the first set of measurements.5. The method of claim 1 , wherein the first set of measurements are received from a MIMO radar.6. The method of claim 5 , wherein the MIMO radar is associated with a vehicle.7. The method of claim 1 , wherein using matrix completion comprises completing a Hankel matrix using the first set of measurements.8. A system for completing measurements for a uniform linear array from measurements from a sparse linear array comprising:at least one computing device; anda memory storing instructions ...

Electronic device, rader device and rader control method

An electronic device capable of reducing a process associated with a radar search is provided. The electronic device DEVa has a transmitting linear array antenna TXA, a receiving linear array antenna RXA, and a control circuit CTLU for controlling the transmitting linear array antenna TXA and the receiving linear array antenna RXA. The transmitting linear array antenna TXA includes a plurality of transmission antennas TXr[ 1 ] to TXr[ 4 ] arranged along the Z direction, and transmits a transmission wave. The receiving linear array antenna RXA includes a plurality of reception antennas RXr[ 1 ] to RXr[ 4 ] arranged along an X direction orthogonal to the Z direction, and receives a reflected wave of a transmission wave.

Method and device for processing radar signals

A device for processing radar signals is suggested, said device comprising a DMA engine, a buffer and a processing stage, wherein the DMA engine is arranged for conducting a read access to a memory, wherein such read access comprises at least two data entries, and for filling the buffer by resorting the at least two data entries, wherein the processing stage is arranged for processing the data stored in the buffer.

ANGLE-RESOLVING BROADBAND RADAR SENSOR FOR MOTOR VEHICLES

Angle-resolving radar sensor for motor vehicles, including: an antenna array including multiple antennas, configured for receiving, situated in various positions in one direction in which the radar sensor is angle-resolving, and a control and evaluation unit configured for an operating mode in which at least one antenna of the radar sensor configured for transmitting transmits a signal received by multiple of the antennas of the radar sensor configured for receiving, and the angle of a radar target is estimated based on amplitude and/or phase relationships between signals of respective evaluation channels, which correspond to different configurations of transmitting and receiving antennas, an evaluation of the signals of the evaluation channels for a respective distance for a respective evaluation channel taking place for an individual estimation of an angle of a radar target, different distances being selected for respective evaluation channels as a function of an angle or angle range hypothesis. 110-. (canceled)11. An angle-resolving radar sensor for a motor vehicle , comprising:an antenna array including multiple antennas configured for receiving, which are situated in different positions in a direction in which the radar sensor is angle-resolving; anda control and evaluation unit configured for an operating mode in which at least one antenna of the radar sensor that is configured for transmitting transmits a signal, which is received by multiple ones of the antennas configured for receiving, and configured to estimate an angle of a radar target based on amplitude and/or phase relationships between signals of respective evaluation channels which correspond to different configurations of transmitting and receiving antennas of the antenna array;wherein the control and evaluation unit is configured to carry out, in the operating mode, for an individual estimation of an angle of the radar target, an evaluation of the signals of the evaluation channels for a ...

Systems and methods for measuring a toppling frequency

A system includes a radar configured to capture radar data of a non-spherical object. The system also includes a processor configured to detect, in the radar data, oscillations corresponding to rotation of the object about an axis that is not an axis of symmetry of the object and determine a frequency of the rotation of the object about the axis based on the detected oscillations.

Frequency nonlinearity calibration in frequency-modulated continuous wave radar

Various embodiments include methods and systems having a frequency-modulated continuous wave radar operable to compensate a return signal for nonlinearity in the associated radar signal that is transmitted. The radar signal can be mixed with a delayed version of the radar signal such that the mixed signal can be used to generate an estimate of the nonlinearity. The estimate can be used to compensate the return signal from an object that reflects the associated transmitted radar signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Radar data processing systems and methods

Techniques to facilitate radar data processing are disclosed. In one example, a radar system includes a frame generation circuit and a frame processing circuit. The frame generation circuit is configured to receive radar signals. The frame generation circuit is further configured to convert the radar signals to at least one frame having a camera interface format. The frame processing circuit is configured to receive the at least one frame via a camera interface. The frame processing circuit is further configured to process the at least one frame. Related methods and devices are also provided.

Use of Dual Processing Channels for Stationary and Moving Objects Illuminated by Radar

Aspects of the disclosure are directed to dual processing. Accordingly disclosed are, an apparatus and a method for dual processing for stationary objects and moving objects including generating a first set of range/Doppler images and a second set of range/Doppler images from a radar system, wherein the first set of range/Doppler images is processed over a first processing time and the second set of range/Doppler images is processed over a second processing time; using a first clustering algorithm to generate a first set of range/Doppler/angle object detections based on the first set of range/Doppler images; using a second clustering algorithm to generate a second set of range/Doppler/angle object detections based on the second set of range/Doppler images; and generating a set of range/Doppler/angle object tracks for stationary and moving objects from the first set of range/Doppler/angle object detections and the second set of range/Doppler/angle object detections.

Modular object-oriented digital sub-system architecture with primary sequence control and synchronization

The present disclosure relates to digital signal processing architectures, and more particularly to a modular object-oriented digital system architecture ideally suited for radar, sonar and other general purpose instrumentation which includes the ability to self-discover modular system components, self-build internal firmware and software based on the modular components, sequence signal timing across the modules and synchronize signal paths through multiple system modules.

Two-dimensional fft computation

A system includes a hardware accelerator configured to perform a two-dimensional (2D) fast Fourier transform (FFT) on an M×N element array. The hardware accelerator has log2 M×N pipeline stages including an initial group of log2 M stages and a final group of log2 N stages. Each stage includes a butterfly unit, a FIFO buffer coupled to the butterfly unit, and a multiplier coupled to the butterfly unit and to an associated twiddle factor table. The hardware accelerator also includes butterfly control logic to provide elements of the M×N element array to the initial group of stages in an N direction of the array, and twiddle factor addressing logic to, for the twiddle factor tables of the initial group of stages, apply an indexed entry of the twiddle factor table to the associated multiplier. The indexed entry begins as a first entry and advances by N entries after every N cycles.

Imaging Systems and Related Methods Including Radar Imaging with Moving Arrays or Moving Targets

Imaging systems, including radio frequency, microwave and millimeter-wave arrangements, and related methods are described. According to one aspect, an imaging system includes an antenna array, a position capture system configured to generate position information indicative of locations of one of the antenna array and the target at the first and second moments in time, and wherein the one of the antenna array and the target move between the first and second moments in time, a transceiver configured to control the antenna array to emit electromagnetic energy towards the target and to generate an output that is indicative of the received electromagnetic energy, a data acquisition system configured to generate radar data, processing circuitry configured to process the position information and the radar data to generate image data regarding the target, and an interface configured to use the image data to generate visual images regarding the target.

Signal-based data compression

Aspects of the present disclosure are directed to apparatuses and methods involving the detection of signal characteristics. As may be implemented in accordance with one or more embodiments, an apparatus includes a radar or sonar transceiver that transmits signals and receives reflections of the transmitted signals. A data compression circuit determines a compression factor based on characteristics of the signals, such as may relate to a channel over which the signal passes and/or related aspects of an object from which the signals are reflected (e.g., velocity, trajectory and distance). Data representing the signals is compressed as a function of the determined compression factor.

Living body detection method and living body detection system

A living body detection method and a living body detection system are provided. A radio-frequency signal reflected by an experiment living body is received, and raw sampling data of the RF signal are obtained. A feature extraction process is performed to generate initial training features of sampling datasets, wherein the initial training features respectively correspond to feature generation rules. A classification prediction model is established according to a posture of the experiment living body and the initial training features, and correlation feature weightings respectively corresponding to the initial training features are obtained. Preferred features corresponding to at least one of the feature generation rules are selected from the initial training features according to the correlation feature weightings. Another classification prediction model configured for determining a posture of a detection living body is established according to the posture of the experiment living body and the preferred features.

Increasing resolution and range for i-q linear frequency modulated radar

A radar system and method of extending a parameter of a location of a target obtained by radar is disclosed. The system receives an echo signal that is a reflection of a radar source signal from the target. The echo signal is sampled and a peak for the echo signal is objected in frequency space. For a peak that is located at a frequency greater than a Nyquist frequency of the echo signal, the peak is moved to a negative domain of the frequency space and the location of the target is determined using the peak in the negative domain.

Method for transmitting/receiving reference signal in wireless communication system, and device therefor

A method whereby a user equipment transmits/receives a reference signal for distance measurement in a wireless communication system according to an embodiment of the present invention comprises: a step of receiving, from a base station, a downlink (DL) positioning reference signal (PRS) including sinusoidal components of different angular frequencies; a step of acquiring a phase difference between the sinusoidal components of the DL PRS; a step of transmitting a first uplink (UL) PRS indicating the phase difference, so as to measure a first distance between the user equipment and the base station at a first point of time; and a step of transmitting a second UL PRS so as to measure a second distance between the user equipment, the position of which has changed after the first point of time, and the base station, wherein the user equipment may configure the same phase difference, acquired via the DL PRS before the first point of time, for the second UL PRS, without receiving an additional DL PRS for measuring the second distance. The user equipment is capable of communicating with at least one of another user equipment, a user equipment related to an autonomous driving vehicle, the base station or a network.

Signal processing device, radar device and signal processing method

A signal processing device, includes: an azimuth estimation unit configured to estimate an arrival azimuth of a radio wave based on a reception signal of plural antennas; an estimated reception signal calculation unit configured to calculate an estimated reception signal based on an estimation result of the arrival azimuth, for comparison with the reception signal; a residual signal calculation unit configured to calculate a residual signal which is a difference between the reception signal and the estimated reception signal; and a determination unit configured to determine whether the estimation result of the arrival azimuth is correct based on the residual signal.

Estimation of transverse velocities or cartesian velocities of point targets with a radar sensor

A method for estimating a speed of a radar target using a radar sensor, in particular a radar sensor for motor vehicles, on the basis of signals that are contained in respective evaluation channels that correspond to different center antenna positions of relevant transmitting and receiving antennas in a direction, having the steps: determining, for the various evaluation channels, a respective individual radial speed assigned to the respective evaluation channel, of the radar target; and estimating a speed of the radar target based on the determined individual radial speeds of the radar target, the speed including information about a tangential speed; and a radar sensor for carrying out the method.

Method for measuring the flow velocity of a medium

Method for measuring the flow velocity of a medium in an open channel with a radar meter, wherein a primary emission direction of the radar meter forms with a direction of a surface of the medium a first angle from 20° to 80° and with a flow direction of the medium a second angle between 0° and 80°, comprising the following steps: Sending a transmission signal with a plurality of frequency ramps, Receiving a reception signal per frequency ramp of the transmission signal, Saving the reception signals, Performing a first spectral analysis of the reception signals, Performing a second spectral analysis of several receiving signals or output signals of the first spectral analysis, Determining a flow velocity based on the phase change yielded from the output signals of the second spectral analysis in at least one distance in the distance range.

Methods and apparatus to test radar integrated circuits

Methods, apparatus, systems and articles of manufacture are disclosed to test RADAR integrated circuits. A radar circuit comprising a local oscillator (LO), a transmitter coupled to the LO and configured to be coupled to a transmission network, a receiver configured to be coupled to the transmission network, and a controller coupled to the LO, the transmitter, and the receiver, the controller to cause the LO to generate a frequency modulated continuous waveform (FMCW), cause the transmitter to modulate the FMCW as a modulated FMCW, cause the transmitter to transmit the modulated FMCW via the transmission network and the receiver to obtain a received FMCW from the transmission network, and in response to obtaining the received FMCW from the receiver, generate a performance characteristic of the radar circuit based on the received FMCW.

Smartphone-based radar system facilitating ease and accuracy of user interactions with displayed objects in an augmented-reality interface

This document describes techniques and systems that enable a smartphone-based radar system facilitating ease and accuracy of user interactions with displayed objects in an augmented-reality interface. The techniques and systems use a radar field to accurately determine three-dimensional (3D) gestures that can be used to interact with augmented-reality (AR) objects that are presented on a display of an electronic device, such as a smartphone. These techniques allow the user to make 3D gestures from a distance—the user does not have to hold the electronic device steady while touching the screen and the gestures do not obstruct the user's view of the AR objects presented on the display.

Smartphone-based radar system facilitating ease and accuracy of user interactions with displayed objects in an augmented-reality interface

This document describes techniques and systems that enable a smartphone-based radar system facilitating ease and accuracy of user interactions with a user interface. The techniques and systems can be implemented in an electronic device, such as a smartphone, and use a radar field to accurately determine three-dimensional (3D) gestures that can be used in combination with other inputs, such as touch or voice inputs, to interact with the user interface. These techniques allow the user to make 3D gestures from a distance—and enable seamless integration of touch and voice commands with 3D gestures to improve functionality and user enjoyment.

Radar system facilitating ease and accuracy of user interactions with a user interface

This document describes techniques and systems that enable a radar system facilitating ease and accuracy of user interactions with a user interface. The techniques and systems can be implemented in an electronic device, such as a smartphone, and use a radar field to accurately determine three-dimensional (3D) gestures that can be used in combination with other inputs, such as touch or voice inputs, to interact with the user interface. These techniques allow the user to make 3D gestures from a distance and enable seamless integration of touch and voice commands with 3D gestures to improve functionality and user enjoyment.

FREQUENCY MODULATED CONTINUOUS WAVE RADAR SYSTEM

A radar system includes first, second, and third transmitter branches. The first transmitter branch transmits a first frequency-modulated continuous wave (FMCW) signal having a first set of chirps having a first phase setting such that phase values of consecutive chirps differ by a first phase difference. The second transmitter branch transmits a second FMCW signal having a second set of chirps having a second phase setting such that phase values of consecutive chirps differ by a second phase difference. The third transmitter branch transmits a third FMCW signal having a third set of chirps having a third phase setting such that phase values of consecutive chirps differ by a third phase difference. The first phase difference, the second phase difference, and the third phase difference are different phase differences. The first phase difference, the second phase difference, and the third phase difference are asymmetrically distributed relative to each other.

STATIC SCENE MAPPING USING RADAR

A method for mapping a static scene using a stationary radar unit operative to transmit radar signals towards a scene, the stationary radar unit comprises a set of receiver antennas configured to detect radar signals from arbitrary directions, and the stationary radar unit is configured to measure target velocity in discrete velocity bins, the method comprising: continuously collecting radar signals over time to detect a static scene using the set of receiver antennas; constructing an occupancy map of the static scene using confirmed detections determined from the collected radar signals, where confirmed detections are detections with radar signal strength exceeding a detection threshold and with velocity falling in a zero velocity bin and detections with radar signal strength exceeding the detection threshold and with a non-zero velocity sufficiently low to cause spill over information in the same bin as detections falling in the zero velocity bin. 1. A method for mapping static objects in a static scene using a stationary radar unit that is operative to transmit radar signals towards the static scene , the stationary radar unit comprising a set of receiver antennas configured to detect radar signals from arbitrary directions , and measure target velocity in discrete velocity bins , the method comprising:continuously collecting radar signals over time to detect static objects in the static scene using the set of receiver antennas of the stationary radar unit;constructing an occupancy map of static objects in the static scene using confirmed detections determined from the collected radar signals, where confirmed detections are detections with radar signal strength exceeding a detection threshold and with velocity falling in a zero velocity bin and detections with radar signal strength exceeding the detection threshold and with a non-zero velocity sufficiently low to cause spill over information in the same bin as detections falling in the zero velocity bin.2. The ...

Apparatus and Method for compensating refection loss of antenna for Radar, and Radar Apparatus using the same

본 발명은, 레이더의 안테나 반사손실 보상장치와 방법 및 그를 이용하는 레이더 장치에 관한 것으로서, 주파수 대역별 안테나의 반사손실을 보상하기 위한 반사손실 보상정보를 산출하는 보상정보 산출부와, 대상체에서 반사되어 수신된 수신신호에 상기 반사손실 보상정보를 적용시켜 최종 수신신호를 생성하는 반사손실 보상부를 포함하며, 안테나에서 발생되는 반사손실에 대한 보상정보를 미리 산출하여 저장하고, 레이더를 이용한 측정시 수신신호의 크기를 보상하여 균일하게 함으로써, 안테나 반사손실에 따른 레이더의 성능 저하를 최소화할 수 있다. The present invention relates to an antenna reflection loss compensation device and method of a radar, and a radar device using the same, wherein the compensation information calculation unit calculates reflection loss compensation information for compensating the reflection loss of an antenna for each frequency band, and is reflected by an object It includes a reflection loss compensation unit that generates the final reception signal by applying the reflection loss compensation information to the received reception signal, and calculates and stores compensation information for the reflection loss generated by the antenna in advance, and receives the received signal when measuring using a radar. By compensating the size of and making it uniform, it is possible to minimize the degradation of the radar performance due to the antenna return loss.

Distance Measuring Device, Distance Measuring Method and Recording Medium for Distance Measuring Program

본 발명은 거리 측정 장치, 거리 측정 방법 및 거리 측정 프로그램이 기록된 기록 매체를 제공하는 것으로서, 송신부(20)는, 발신부(12)의 출력 신호와 동일 주파수(f)의 전자파를 계측축(x축) 방향으로 방출한다. 검출부(30)는, 방향성 결합기(32)에서 검출한 반사파(R)를 송신 신호의 동상(同相) 신호와 직교 신호에 의해 동기 검파하고, 검파 신호로부터 직류 성분을 추출함으로서, 반사파(R)의 동상 성분(I(f))과 직교 성분(Q(f))을 검출한다. 해석 신호 생성부(42)는, 반사파(R)의 동상 성분(I(f)), 직교 성분(Q(f))과 소정의 거리(d o )에 따른 주기성을 갖는 신호(I O (f), Q O (f))를 믹싱하고, 얻어진 측대파의 한쪽만을 이용하여 해석 신호(p(f))를 생성한다. 푸리에 변환부(44)는 해석 신호(p(f))를 푸리에 변환하여 얻어진 프로파일(P(x))로부터 측정 대상물까지의 거리를 구한다. The present invention provides a recording medium in which a distance measuring device, a distance measuring method, and a distance measuring program are recorded. The transmitting unit 20 measures electromagnetic waves of the same frequency f as the output signal of the transmitting unit 12 to the measurement axis ( x-axis). The detection unit 30 synchronously detects the reflected wave R detected by the directional coupler 32 by the in-phase signal and the orthogonal signal of the transmission signal, and extracts the DC component from the detected signal, thereby extracting the reflected wave R. In-phase component I (f) and orthogonal component Q (f) are detected. The analysis signal generation unit 42 has a signal I O (f) having a periodicity corresponding to the in-phase component I (f) and the quadrature component Q (f) of the reflected wave R according to the predetermined distance d o . ), Q O (f)) is mixed, and an analysis signal p (f) is generated using only one of the obtained sidebands. The Fourier transform section 44 calculates the distance from the profile P (x) obtained by Fourier transforming the analysis signal p (f) to the measurement target. 송신부, 발신부, 검출부, 푸리에 변환부, 방향성 결합기 Transmitter, transmitter, detector, Fourier transform, directional coupler

Method and apparatus for detecting surrounding environment based on sensing signal of frequency modulated continuous wave radar and continuous wave radar

CW(continuous wave) 레이더 센싱 신호 및 FMCW(frequency modulated continuous wave) 레이더 센싱 신호 기반의 주변 환경 감지 방법 및 장치가 개시되어 있다. FMCW 레이더 센싱 신호 및 CW 레이더 센싱 신호를 기반으로 타겟을 탐지하는 방법은 레이더가 타겟을 탐지하기 위한 CW 레이더 센싱 신호를 전송하고 상기 CW 레이더 센싱 신호에 대한 응답인 제1 응답 신호를 수신하는 단계, 레이더가 타겟을 탐지하기 위한 FMCW 레이더 센싱 신호를 전송하고 FMCW 레이더 센싱 신호에 대한 응답인 제2 응답 신호를 수신하는 단계, 레이더가 제1 응답 신호 및 제2 응답 신호를 신호 처리하여 비트 신호에 대한 주파수 스펙트럼을 생성하는 단계와 레이더가 비트 신호에 대한 주파수 스펙트럼을 기반으로 타겟을 탐지하는 단계를 포함할 수 있다. A method and apparatus for sensing a surrounding environment based on a continuous wave (CW) radar sensing signal and a frequency modulated continuous wave (FMCW) radar sensing signal are disclosed. A method for detecting a target based on an FMCW radar sensing signal and a CW radar sensing signal includes receiving a first response signal that is a response to the CW radar sensing signal and transmitting a CW radar sensing signal for detecting a target, Receiving a second response signal that is a response to an FMCW radar sensing signal, wherein the radar transmits an FMCW radar sensing signal for detecting the target, and the radar processes the first response signal and the second response signal, Generating a frequency spectrum and detecting the target based on the frequency spectrum of the bit signal by the radar.

Distance measuring device, distance measuring method, and distance measuring program

【課題】 狭い放射周波数帯域においても、近距離まで精度良く計測可能な距離測定装置、距離測定方法および距離測定プログラムを提供する。 【解決手段】 送信部２０は、発信部１２の出力信号と同一周波数ｆの電磁波を計測軸（ｘ軸）方向に放出する。検出部３０は、方向性結合器３２にて検出した反射波Ｒを送信信号の同相信号と直交信号とにより同期検波し、検波信号から直流成分を抽出することにより、反射波Ｒの同相成分Ｉ（ｆ）と直交成分Ｑ（ｆ）とを検出する。解析信号生成部４２は、反射波Ｒの同相成分Ｉ（ｆ），直交成分Ｑ（ｆ）と、所定の距離ｄ ０ に応じた周期性を持つ信号Ｉ ０ （ｆ），Ｑ ０ （ｆ）とをミキシングし、得られた側帯波の一方のみを用いて解析信号ｐ（ｆ）を生成する。フーリエ変換部４４は、解析信号ｐ（ｆ）をフーリエ変換して得られたプロファイルＰ（ｘ）から測定対象物までの距離を求める。 【選択図】 図１ PROBLEM TO BE SOLVED: To provide a distance measuring device, a distance measuring method, and a distance measuring program capable of accurately measuring a short distance even in a narrow radiation frequency band. A transmission unit 20 emits an electromagnetic wave having the same frequency f as an output signal of a transmission unit 12 in a measurement axis (x-axis) direction. The detection unit 30 synchronously detects the reflected wave R detected by the directional coupler 32 by using the in-phase signal and the quadrature signal of the transmission signal, and extracts a DC component from the detected signal, whereby the in-phase component of the reflected wave R is extracted. I (f) and orthogonal component Q (f) are detected. The analysis signal generation unit 42 has signals I 0 (f), Q 0 (f) having periodicity corresponding to the in-phase component I (f) and quadrature component Q (f) of the reflected wave R and a predetermined distance d 0. And the analysis signal p (f) is generated using only one of the obtained sideband waves. The Fourier transform unit 44 obtains the distance from the profile P (x) obtained by Fourier transforming the analysis signal p (f) to the measurement object. [Selection] Figure 1

Smartphone, system and method comprising a radar system

본 문서는 레이더 시스템을 포함하는 스마트 폰, 시스템 및 방법을 가능하게 하는 기술 및 시스템을 설명한다. 이 기술 및 시스템은 레이더 필드를 사용하여 스마트 폰과 같은 전자 디바이스의 디스플레이 상에 제공되는 증강 현실(AR) 객체와 상호 작용하는데 사용될 수 있는 3차원(3D) 제스처를 정확하게 결정한다. 이러한 기술을 통해 사용자는 거리에서 3D 제스처를 수행할 수 있다. 사용자는 화면을 터치하는 동안 전자 디바이스를 안정적으로 유지할 필요가 없고 제스처로 인해 디스플레이에 제시된 AR 객체에 대한 사용자의 시야를 방해하지 않는-거리에서 3D 제스처를 수행할 수 있다. This document describes techniques and systems that enable smart phones, systems and methods that include radar systems. This technology and system uses radar fields to accurately determine three-dimensional (3D) gestures that can be used to interact with augmented reality (AR) objects presented on the display of an electronic device such as a smart phone. These technologies allow users to perform 3D gestures on the street. The user can perform 3D gestures at a distance that does not require the electronic device to remain stable while touching the screen and the gesture does not obstruct the user's view of the AR object presented on the display.

Radar equipment

FMCW-SAR system using correction continuous motion effect and method for reconstructing SAR image using FMCW-SAR system

In the present invention, provided are an FMCW-SAR system, which is installed on a moving body moving on the ground, sea, and air and restores an SAR image from a received signal having a continuous movement effect corrected based on a matching filter modified based on the speed of the moving body, and an operation method thereof. The FMCW-SAR system comprises: an antenna location change amount calculation unit which calculates a location change amount of a radar antenna arranged in the FMCW-SAR system while the FMCW-SAR system obtains the received signal reflected by a target; an antenna location change amount application unit which applies the location change amount of the radar antenna to a signal of a time area related to the received signal; a received signal conversion unit which converts the signal of the time area to which the location change amount of the radar antenna has been applied into a signal in a frequency area; an antenna location change amount removal unit which pre-processes the received signal by removing the location change amount of the radar antenna from the signal of the frequency area; and an SAR image restoration unit which restores an SAR image based on the received signal from the location change element of the radar antenna.

The radar level gauge divided with signal

一种用于提供对距保持在罐中的产品的表面的距离的不受窄带干涉影响的测量的方法，包括：使返回信号与发射信号混合(S3)以提供中频信号，以及基于中频信号确定所述距离。确定所述距离的步骤还包括：将中频信号划分(S4)为多个频率部分，其中，每个频率部分对应于发射信号的频率间隔；将被干扰的频率部分识别(S5)为受窄带干涉影响的频率部分；以及基于未受窄带干涉影响的频率部分确定(S6)所述距离。通过将中频信号划分为对应于发射信号的频率间隔的频率部分，可检测存在窄带干涉的频率间隔。

Radar apparatus

一种雷达装置，包括：将向空间发射、由目标物体反射的电波，作为接收信号接收的由多个天线元件构成的接收天线(12)；根据将由接收天线(12)输出的接收信号下降成所定的频带的模拟信号变换的数字信号，检出到达目标物体的距离、目标物体的速度及方位的信号处理部(20)；信号处理部(20)，进行根据将接收天线(12)的多个天线元件的一部分输出作为处理单位的第1处理单位和与将接收天线(12)的多个天线元件的一部分输出作为处理单位的第1处理单位不同的第2处理单位的输出的处理。即使在搭载上有制约时，也能实现大范围的雷达处理。

Sparse array design for automotive radar using particle swarm optimization

公开了一种用于设计用于汽车雷达的稀疏阵列的方法。方法将多个天线元件中的每一个从初始随机种子放置开始移动到候选相邻网格位置，以迭代地搜索对成本函数进行改进的天线元件的放置。可以根据与候选放置相关联的FFT响应的特性确定用于每个候选放置的成本函数。方法可以基于随机种子放置在多个候选放置中搜索具有最小成本函数的候选放置。可以针对大量随机种子放置重复搜索，以找到与每个随机种子放置对应的具有最小成本函数的候选放置。方法可以比较与多个随机种子放置对应的最小成本函数以确定具有最小成本函数的优化的放置。

REDUCTION OF VIBRATIONS IN A RADAR SYSTEM ON A MOVING PLATFORM

Ein Verfahren zum Abschwächen von Schwingungen in einem Radarsystem auf einer beweglichen Plattform beinhaltet das Erhalten von empfangenen Signalen, die sich aus Reflexionen der übertragenen Signale durch ein oder mehrere Objekte in einem Sichtfeld des Radarsystems ergeben. Die empfangenen Signale sind ein dreidimensionaler Datenwürfel. Das Verfahren beinhaltet zudem das Verarbeiten der empfangenen Signale, um eine erste dreidimensionale Karte und eine zweite dreidimensionale Karte zu erhalten, das Schätzen der Schwingung basierend auf der Durchführung einer ersten Erfassung unter Verwendung der zweiten dreidimensionalen Karte und das Unterdrücken der Schwingung aus der ersten dreidimensionalen Karte, um eine korrigierte erste dreidimensionale Karte zu erhalten. Eine korrigierte zweite dreidimensionale Karte wird durch weitere Verarbeitung der korrigierten ersten dreidimensionalen Karte erhalten; und eine zweite Erfassung wird unter Verwendung der korrigierten zweiten dreidimensionalen Karte durchgeführt. One method for attenuating vibrations in a radar system on a moving platform involves receiving received signals that result from reflections of the transmitted signals by one or more objects in a field of view of the radar system. The received signals are a three-dimensional data cube. The method also includes processing the received signals to obtain a first three-dimensional map and a second three-dimensional map, estimating the vibration based on performing a first detection using the second three-dimensional map, and suppressing the vibration from the first three-dimensional map to get a corrected first three-dimensional map. A corrected second three-dimensional map is obtained by further processing the corrected first three-dimensional map; and a second acquisition is performed using the corrected second three-dimensional map.

Method, radar system and vehicle for signal processing of radar signals

The invention describes a method for signal processing of radar signals according to claim 1. The invention describes a method for signal processing of radar signals of a radar system, in particular a vehicle radar system, preferably an automobile radar system, having at least two radar units which are spaced apart from one another, said method comprising the following steps: - capturing at least one three-dimensional field of vision of the radar system with radar signals of the at least two radar units; - generating a discrete total co-ordinate system of the field of vision, in which measurement data, which are generated by the capture of the field of vision, of the at least two radar units of the radar system are co-registered; and - determining a preferably multi-dimensional vector velocity for at least one pixel of the discrete total co-ordinate system and/or a preferably multi-dimensional vector velocity for the radar system; - reconstructing at least one three-dimensional sub-field of the field of vision by means of the determined vector velocity and/or the vector velocity for the radar system and also by means of the measurement data of at least one of the radar units. Furthermore, the invention describes a radar system according to claim 21 and a vehicle according to claim 25. An improved angular resolution for the radar system can be achieved by the invention, without enlarging the physical dimensions of the aperture of the receiving antenna array, preferably without an intrinsic movement or a target movement being previously known or having to be determined by an external sensor system.