EP1481260A1 - Dispositif de radar a impulsions et procede d'interception, de detection et/ou d'evaluation d'au moins un objet - Google Patents

Dispositif de radar a impulsions et procede d'interception, de detection et/ou d'evaluation d'au moins un objet

Info

Publication number
EP1481260A1
EP1481260A1 EP02794986A EP02794986A EP1481260A1 EP 1481260 A1 EP1481260 A1 EP 1481260A1 EP 02794986 A EP02794986 A EP 02794986A EP 02794986 A EP02794986 A EP 02794986A EP 1481260 A1 EP1481260 A1 EP 1481260A1
Authority
EP
European Patent Office
Prior art keywords
unit
signals
pulse switch
pulse
switch unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP02794986A
Other languages
German (de)
English (en)
Inventor
Thomas Wixforth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1481260A1 publication Critical patent/EP1481260A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • G01S13/44—Monopulse radar, i.e. simultaneous lobing
    • G01S13/4445—Monopulse radar, i.e. simultaneous lobing amplitude comparisons monopulse, i.e. comparing the echo signals received by an antenna arrangement with overlapping squinted beams
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/003—Bistatic radar systems; Multistatic radar systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G01S13/28—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
    • G01S13/284—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses using coded pulses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9314—Parking operations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9315—Monitoring blind spots
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9321—Velocity regulation, e.g. cruise control

Definitions

  • the present invention relates to a pulse radar device for detecting, detecting and / or evaluating at least one object, having [a] at least one oscillator unit, in particular microwave
  • Oscillator unit for generating oscillator signals
  • At least one transmit pulse switch unit to which the oscillator signals are applied for generating pulse-modulated ones
  • nr.at least one transmission antenna unit connected downstream of the transmission pulse switch unit for radiating the high-frequency signals generated by the transmission pulse switch unit;
  • At least one clock generator unit in particular N [low] F [requenz] clock generator unit, for generating clock signals with which both the transmit pulse switch unit and the receive pulse switch unit can be acted on; and [e] at least one pulse delay unit connected between the clock generator unit and the reception pulse switch unit for delaying the clock signal defined with respect to the clock signals with which the transmission pulse switch unit is actuated, with which the reception pulse switch unit is actuated.
  • the present invention further relates to a method for detecting, detecting and / or evaluating at least one object, in which method
  • Oscillator signals are generated by means of at least one oscillator unit, in particular a microwave oscillator unit; pulse-modulated high-frequency signals are generated by means of at least one transmit pulse switch unit to which the oscillator signals are applied; the radio-frequency signals generated by the transmission pulse switch unit are emitted by means of at least one transmission antenna unit connected downstream of the transmission pulse switch unit; the signals reflected on the object by means of at least one catch antenna unit can be received; the signals received by the receiving antenna unit, with which the first input connection of at least one l [nphase] / Q [uadratur] mixing unit connected downstream of the receiving antenna unit can be acted upon, with the oscillator signals with which the second input connection of the respective I / Q mixing unit can be acted on, can be mixed using the respective I / Q mixing unit; Clock signals with which both the transmit pulse switch unit and at least one receive pulse switch unit downstream of the receive antenna unit can be acted upon are generated by means of at least one clock generator unit, in particular N [low] F [reque
  • an object detection system with a microwave radar sensor is known, by means of which the detection of objects in front of a vehicle, in particular also at a greater distance, is made possible.
  • This radar sensor contributes to one Vehicle safety system in which information about the distance and the relative speed of the vehicle to the preceding vehicles is continuously processed in a predetermined angular range.
  • Document DE 44 42 189 A1 discloses that in a system for measuring distance in the vicinity of motor vehicles, sensors with transmitter units and with receiver units are used at the same time for transmitting and receiving information. With the aid of the distance measurement, passive protective measures for the motor vehicle, for example in the event of a front, side or rear impact, can be activated here. With an exchange of the recorded information, for example, an assessment of traffic situations can be carried out to activate corresponding triggering systems.
  • an object detection system in which an optical transmitter for a light beam with a variable transmission angle and an angle-resolving optical receiver are provided.
  • the emitted light beam is modulated here in such a way that the position of the object within the angular range of the emitted light beam can also be determined up to a certain distance from the phase difference between the transmitted light beam and the received light beam.
  • Document DE 196 22 777 A1 discloses a sensor system for automatically determining the relative position between two objects.
  • This conventional sensor system consists of a combination of an angle-independent sensor and an angle-dependent sensor.
  • the sensor which does not resolve the angle and is therefore independent of the angle, is designed as a sensor which measures the distance to one via a transit time measurement
  • the angle-dependent sensor consists of a geometric arrangement of optoelectronic transmitters and receivers, which are arranged in the form of light barriers.
  • the sensors, which both cover a common detection area, are arranged in close spatial proximity.
  • the distance to the object is determined by means of the angle-independent sensor and the angle to the object by means of the angle-resolving sensor.
  • the relative position to the object is known on the basis of the distance and the angle to the object.
  • the use of two sensors is proposed, which together determine the angle to the object according to the triangulation principle.
  • a method and a device for object detection with at least two distance-resolving sensors attached to a motor vehicle are known, the detection areas of which overlap at least partially.
  • Means are available to determine relative positions of possible detected objects with respect to the sensors in the overlap area according to the triangulation principle; Possible apparent objects that result from the object determination can be determined by dynamic object observations.
  • an object detection system proposed in particular for a motor vehicle, the object detection system more object detectors and / or operating means of which different detection ranges and / or de- be tektions Suitee detected.
  • an object detector can be a radar sensor which, in a first operating mode, has a relatively large detection range with a relatively small angle detection range and in a second operating mode has a relatively short detection range with an enlarged angle detection range.
  • a distance measurement can be carried out with a so-called pulse radar, in which a carrier pulse with a rectangular envelope of an electromagnetic oscillation in the gigahertz range is emitted.
  • This carrier pulse is reflected on the target object, and from the time period between the emission of the pulse and the arrival of the reflected radiation, the target distance and, with restrictions, the relative speed of the target object can be determined using the Doppler effect.
  • a measuring principle is described, for example, in the specialist book by Albrecht Ludloff, "Handbook Radar and Radar Signal Processing", pages 2-21 to 2-44, Vieweg-Verlag, 1993.
  • a large number of radar sensors for the individual conflict situations in the vicinity of the motor vehicle are generally required for the safe control of the occupant protection systems mentioned at the beginning in a motor vehicle;
  • early collision detection is necessary in order to enable premature detection of an object which poses a danger to the vehicle occupants in the event of a collision.
  • This should make it possible to activate protective systems such as airbags, belt tensioners or sidebags in good time in order to achieve the greatest possible protective effect.
  • the detection or monitoring of the traffic situation can also be useful for a large number of other applications.
  • so-called universal sensors can be operated together using a specially adapted bus system and interconnected with an evaluation unit, but for performance reasons it is often not possible to optimally process all distance ranges within a short range in a relatively short evaluation time for safe functioning.
  • the surrounding area of the motor vehicle is detected in one or more reception branches using a transmission signal from a pulse radar sensor such that different distance areas are evaluated in parallel and / or sequentially; nevertheless, neither the device nor the method according to the document DE 199 63 005 A1 is able to also provide corresponding angle information with regard to the object to be detected.
  • the teaching according to the present invention is therefore based on the conventional radar concept and on the conventional level of development, which permits the distance measurement of the targets to be detected and sensed by means of 24 gigahertz short-range radar technology, and not only supplements them with further reception channels or paths, but to implement a sensor group around at least one (receiving) group antenna.
  • This at least one group antenna enables digital signal processing methods
  • the directional effect of the same can be continuously adapted to the current properties of the transmission channel; in this context, one also speaks of an adaptive antenna system or of an intelligent antenna (so-called “smart antenna”).
  • the adaptation is carried out by algorithms which determine the best possible set of weighting factors on the basis of the received signal values.
  • the present invention relates to the use of at least one pulse radar device of the type set out above and / or a method according to the type set out above in the field of vehicle surroundings sensor technology, for example for measuring and for determining the angular position of at least one object, such as that is also relevant in the context of a pre-crash detection in a motor vehicle.
  • a sensor system determines whether there is a possible collision with the detected object, for example with another
  • Angle detection or a Stop & Go system as an extension to an existing device for automatic control of the driving speed such as an A [daptive-] C [ruise-] C [ontrol] system.
  • FIGS. 1 to 3 Further refinements, features and advantages of the present invention are explained in more detail below with reference to the three exemplary embodiments illustrated by FIGS. 1 to 3.
  • Figure 1 is a schematic representation of a first embodiment of the pulse radar device according to the present invention.
  • FIG. 2 shows a schematic illustration of a second exemplary embodiment of the pulse radar device according to the present invention.
  • Fig. 3 is a schematic representation of a third embodiment of the pulse radar device according to the present invention.
  • FIGS. 1 to 3 Identical or similar configurations, elements or features are provided with identical reference numerals in FIGS. 1 to 3.
  • FIG. 1 shows a first exemplary embodiment of the pulse radar device 100, in which oscillator signals in the form of pulses are used by means of a microwave oscillator unit 20 (so-called “24 GHz microwave front end” corresponding to a period of approximately 41.67 picoseconds or a wavelength of approximately 12.5 millimeters) a pulse duration of approximately four hundred picoseconds (corresponding to a frequency of approximately 2.5 gigahertz or a wavelength of approximately twelve centimeters) and amplitude-modulated on a 24.125 gigahertz carrier.
  • a microwave oscillator unit 20 so-called “24 GHz microwave front end” corresponding to a period of approximately 41.67 picoseconds or a wavelength of approximately 12.5 millimeters
  • a pulse duration of approximately four hundred picoseconds (corresponding to a frequency of approximately 2.5 gigahertz or a wavelength of approximately twelve centimeters) and amplitude-modulated on a 24.125 gigahertz carrier.
  • a pulse therefore contains about ten wave trains of the 24 GHz carrier
  • Step recovery diodes are used to generate the short pulses.
  • the pulses on the transmission side control a transmission pulse switch unit 12 in the form of a microwave switch, with which the carrier is amplitude-modulated (so-called “on-off-keying").
  • the pulse repetition frequency is about five megahertz, which is one
  • the transmission pulses shaped in this way are passed to a transmission amplifier unit 14 in the form of an amplifier transistor and then to a transmission antenna element 16, by means of which the transmission pulse switch Unit 12 generated high-frequency signals are emitted and which provides a broad antenna pattern (so-called "antenna pattern") for the purpose of a large range of angular coverage.
  • the pulses reflected by the target objects are then collected by a receiving antenna unit 30, which is separate because of the ease of decoupling, and fed to a receiving amplifier.
  • a receiving antenna unit 30 in the form of a group antenna with four antenna elements 32, 34, 36, 38 is shown as an example in FIG. 1 (however, two, three, five or more antenna elements can also be provided).
  • each antenna element 32, 34, 36, 38 there is, according to the invention, a separate receiver channel or path, each having a receive amplifier 42, 44, 46, 48 in the form of a so-called L [ow-] N [oise-] A [mplifier] , for example each having one or two R [adio] F [requenz] transistor units,
  • Baseband amplifier and with impedance conversion for example each having an N [low] F [requenz] transistor unit with associated filter, and
  • the respective L [okal-] O [scillator] gate of all I / Q mixers 62, 64, 66, 68 is now pulsed by means of a power divider 18 that works as symmetrically as possible, by means of a pulse delay unit 24 adjustable time delayed sweeping L [okal-] O [szillator] signals of the same amplitude and with the same time profile are driven and fed. These LO pulses are generated in exactly the same way as the pulses on the transmission side.
  • the signal energy of the baseband signals of the received pulses at the output connection of the I / Q mixers 62, 64, 66, 68 becomes maximum (so-called "local maximum”); in other words, this means that the received pulses are a matched
  • this matched filter performs a temporal windowing on the reception side, it also filters out unwanted noise and thus optimizes the signal-to-noise power ratio behind the I / Q mixers 62, 64, 66, 68.
  • the time delay which is proportional to the distance of the target object, is only slowly varied between zero and about two hundred nanoseconds compared to the pulse repetition frequency of five megahertz provided by the microwave oscillator unit 20, namely by means of at least one variation oscillator unit 26 assigned to the pulse delay unit 24 a frequency of approximately one hundred Hertz (corresponding to a period of approximately ten milliseconds) and preferably sawtooth-shaped;
  • the matched filter represents a time domain window that is generated by means of the sawtooth signal
  • Variation oscillator unit 26 is pushed across the width of the distances of the target object.
  • the matched filter or "target window” lies for more than one pulse above a target and that the signal energies of several pulses belonging to a target are obtained by a subsequent, by means of the low-pass filter units 72a, 72b, 74a, 74b, 76a, 76b, 78a, 78b low pass filtering (on) are integrated, which improves the signal-to-noise power ratio and thus significantly increases the probability of exact target detection; Furthermore, by means of the low-pass filters 72a, 72b, 74a, 74b, 76a, 76b, 78a, 78b, the bandwidth of the received analog signals is compared to the broadband
  • Components of the baseband signal and for the Q [uadratur] components of the baseband signal limit the target range resolution that can still be derived after the respective low-pass filter 72a, 72b, 74a, 74b, 76a, 76b, 78a, 78b and will therefore be approximately one hundred times one hundred Hertz ,
  • a relatively low sampling rate namely approximately twenty kilohertz to approximately forty kilohertz, is the A [nalog] / D [igital] converter 82a, 82b, 84a, 84b, 86a, 86b, 88a, 88b that samples the baseband signals sufficient for further digital signal processing and evaluation in a microprocessor 90.
  • the cut-off frequency of the low-pass filters 72a, 72b, 74a, 74b, 76a, 76b, 78a, 78b also limits the maximum Doppler frequency of the baseband pulses that occurs with target objects moving radially to the radar and thus the maximum radial relative speed of detectable target objects.
  • a / D filters which are connected downstream of the low-pass filter units 72a, 72b, 74a, 74b, 76a, 76b, 78a, 78b and operate at least essentially in parallel.
  • FIG. 2 shows a second exemplary embodiment of the pulse radar device 100, which is a variant of the first exemplary embodiment
  • Figure 1 illustrates; for this reason, only the differences from the first exemplary embodiment are set out below to avoid unnecessary repetitions.
  • the pulse switches 52, 54, 56, 58 on the receiving side are the I / Q mixers 62, 64, 66, 68 in the R [adio] F [requenz] instead of in the L [okal-] O [szillator] branch.
  • Receiving branch 50 namely after the respective antenna elements 32, 34, 36, 38 and after the respective receiving amplifiers 42, 44, 46, 48 and in front of the respective I / Q mixers 62, 64, 66, 68.
  • each of the four I / Q mixer 62, 64, 66, 68 directly on its second input connection (and not as in the first embodiment).
  • Example is fed by the oscillator signal of the microwave oscillator unit 20 via the only receive pulse switch unit 52) there.
  • the receive pulse switch units 52, 54, 56, 58 of the four receive channels or paths can be activated selectively or selectively, and in this case — preferably individually in succession in time and — preferably with adjustable time delay using the pulse delay unit 24, What is made possible in FIG. 3 by a multi-unit 28, which can switch through the 5 MHz pulses of the low-frequency clock generator unit 22 to the four different reception channels or paths as desired.
  • the respective output signals from the output connections of the receive pulse switch units 52, 54, .56, 58 are dividered via a H [high] F [requenz] power divider / combiner 60 (so-called "H [igh] F [requency]”) / combiner ”) and brought together on the
  • a prerequisite for the perfect functioning of the circuit technology according to FIG. 3 is that the chronologically successive recording of the individual element signals takes place faster than the signal situation of the sensor field changes.
  • a higher outlay for the A / D converters 82a, 82b, 84a, 84b, 86a, 86b, 88a, 88b and for the digital signal processing 90 is appropriate for this, in order to be higher in comparison to the circuit arrangements according to FIGS. 1 and 2 To achieve scanning rates or higher processing rates.
  • a selective scanning of the received signals of the antenna elements 32, 34, 36, 38 of the receiving group antenna 30 takes place in a manner essential to the invention by means of the selective, preferably individually sequential activation of the received pulse switch units 52, 54, 56, 58 ,
  • Object situation in the sensed field is significantly faster, so that a complex signal vector for digital signal processing in the processor 90 can be reconstructed from the complex-value individual signals forwarded to the processor 90, which can be assigned to the four antenna elements 32, 34, 36, 38.
  • the three exemplary embodiments described above can be changed in particular with regard to the number of their receiving channels or branches and the receiver modules used together or separately, without essentially changing the function according to the present invention.
  • a combination of parallel and sequential evaluation of the different distance and / or angular ranges that deviates from the three exemplary embodiments shown is also possible. Furthermore, even when evaluating the information from the different distance ranges, it may not be necessary to query all of the distance information in order to save measurement time because of the drop in performance with the fourth power of the distance; however, the distance information should be checked continuously until the first relevant change.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention a pour but de perfectionner un dispositif de radar à impulsions (100) ainsi qu'un procédé d'interception, de détection et/ou d'évaluation d'au moins un objet, permettant d'obtenir des informations relatives non seulement à la distance, mais également à la position angulaire de l'objet à détecter. A cet effet, l'invention est caractérisée en ce que l'unité d'antenne réceptrice (30) du dispositif de radar à impulsions (100) est constituée d'au moins une antenne de groupes présentant au moins deux éléments d'antenne (32, 34, 36, 38) et est conçue pour la réception de signaux réfléchis par l'objet sous forme de signaux vectoriels, en ce qu'à la suite de la branche de réception (50) du dispositif de radar à impulsions (100) est monté au moins un circuit de réception (70), en particulier un circuit de réception basse fréquence (NFE) pour l'évaluation et pour le traitement ultérieur des signaux vectoriels reçus, de façon qu'également la position angulaire d'au moins un objet puisse être mesurée et déterminée.
EP02794986A 2002-02-27 2002-12-11 Dispositif de radar a impulsions et procede d'interception, de detection et/ou d'evaluation d'au moins un objet Ceased EP1481260A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10208332 2002-02-27
DE10208332A DE10208332A1 (de) 2002-02-27 2002-02-27 Pulsradarvorrichtung und Verfahren zum Erfassen, zum Detektieren und/oder zum Auswerten von mindestens einem Objekt
PCT/DE2002/004537 WO2003073124A1 (fr) 2002-02-27 2002-12-11 Dispositif de radar a impulsions et procede d'interception, de detection et/ou d'evaluation d'au moins un objet

Publications (1)

Publication Number Publication Date
EP1481260A1 true EP1481260A1 (fr) 2004-12-01

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EP02794986A Ceased EP1481260A1 (fr) 2002-02-27 2002-12-11 Dispositif de radar a impulsions et procede d'interception, de detection et/ou d'evaluation d'au moins un objet

Country Status (5)

Country Link
US (1) US20050156779A1 (fr)
EP (1) EP1481260A1 (fr)
JP (1) JP2005525547A (fr)
DE (1) DE10208332A1 (fr)
WO (1) WO2003073124A1 (fr)

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US20050156779A1 (en) 2005-07-21
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