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WO2020120334A1 - Procédé pour un radar mimo pour la détermination claire de cibles, et radar - Google Patents

Procédé pour un radar mimo pour la détermination claire de cibles, et radar Download PDF

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Publication number
WO2020120334A1
WO2020120334A1 PCT/EP2019/084072 EP2019084072W WO2020120334A1 WO 2020120334 A1 WO2020120334 A1 WO 2020120334A1 EP 2019084072 W EP2019084072 W EP 2019084072W WO 2020120334 A1 WO2020120334 A1 WO 2020120334A1
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WO
WIPO (PCT)
Prior art keywords
energy
energy value
antennas
radar
spectrum
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
PCT/EP2019/084072
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German (de)
English (en)
Inventor
Benjamin Sick
Stefan Zechner
Florian Engels
Adam HEENAN
Ernest CASABAN
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of WO2020120334A1 publication Critical patent/WO2020120334A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01S13/88—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
    • G01S13/003—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
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/325—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of coded signals, e.g. P.S.K. signals
    • 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
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using sawtooth modulation
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G01S13/878—Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector
    • 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
    • G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
    • G01S7/0233—Avoidance by phase multiplex
    • 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
    • G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
    • G01S7/0234—Avoidance by code multiplex
    • 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
    • G01S7/35—Details of non-pulse systems
    • G01S7/352—Receivers
    • G01S7/354—Extracting wanted echo-signals
    • 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
    • G01S7/35—Details of non-pulse systems
    • G01S7/352—Receivers
    • G01S7/356—Receivers involving particularities of FFT processing

Definitions

  • the invention relates to a method for a MIMO radar for the unambiguous determination of targets and a radar which is designed for this method.
  • Radars which use MIMO methods are known in the prior art. These include a plurality of transmitting antennas and a plurality of receiving antennas. The successive frequency ramps of the transmitting antenna are encoded by specifically varying the start phase. The coding is often selected periodically here. A radar signal reflected from an object is thereby distributed over several positions in the determined spectrum. Particularly when using multiple transmit antennas, a plurality of energy peaks are generated in the spectrum, all of which belong to the same target of the object. It can occur in certain cases that it is no longer possible to clearly differentiate between the energy components of the different transmission antennas. As a result, the amplitude and the angle of the target may be incorrectly determined.
  • the method is suitable for a MIMO radar (multiple input multiple output radar).
  • a MIMO radar multiple input multiple output radar
  • Such a radar comprises several transmitting antennas and several receiving antennas.
  • the radar preferably works as an FMCW radar (Frequency Modulated Continuous Wave radar).
  • each transmitting antenna transmits a number of frequency ramps which follow one another in time. These frequency ramps are also called chirps or ramps.
  • the successive frequency ramps of each transmitting antenna are varied according to a periodic coding. This means that the start phase of each frequency ramp sent out is set specifically for each frequency ramp.
  • the specifically set start phase, which varies for successive frequency ramps, is also referred to as the coding sequence for a single transmission antenna.
  • the term coding thus encompasses the coding sequences of all transmission antennas.
  • the individual NEN antennas preferably have different coding sequences with respect to coding.
  • the coding sequences are periodically applied to the frequency ramps of the individual transmission antennas.
  • the coding sequence follows periodically with a periodicity with the value N.
  • N indicates the minimum number of start phases for the successive frequency ramps, the coding sequence necessary to provide for a transmitting antenna.
  • N describes the number of frequency ramps before the coding sequence is repeated. If at least 4 defined successive start phases for the frequency ramps are necessary for a coding sequence, then this has a periodicity of 4.
  • phase is varied in binary form, that is to say at 0 ° or 180 °.
  • This is also known as BPSK (Binary Phase Shift Keying).
  • the variation of the phase jumps can also be chosen freely, which is also called PSK (phase shift keying).
  • Different transmission antennas work with different coding sequences during transmission, for example the coding sequence [0000] for a first transmission antenna, which can also be reduced to [0], and the code [0011] for the second transmission antenna.
  • the coding sequences of the two transmit antennas chosen as examples have a periodicity of 1 and 4.
  • Radar signals emitted, in particular the frequency ramps coded by each transmitting antenna can be reflected on an object that is within the field of view of the radar.
  • the reflected radar signals are then detected by the receiving antennas as input signals.
  • An object corresponds to an object that has one or more scattering centers.
  • the scattering centers can be detected by the radar as targets, in particular via a or several dimensions of relative distance, relative speed, azimuth angle and / or elevation angle is resolved. This is done by evaluating the
  • Detected scattering centers or reflection centers are also referred to as targets.
  • a spectrum is determined from the received signals by evaluation.
  • the determination of such a spectrum is well known in the prior art. This is usually done via one or more Fourier transformations, depending on which dimensions are used to resolve.
  • the spectrum can accordingly be multidimensional.
  • the spectrum is 4 dimensional for resolution via distance, speed, azimuth angle and elevation angle. Targets appear as energy peaks within the spectrum.
  • the energy of a detected target is distributed over several different positions within the spectrum due to the coding. This means that several energy peaks occur within a multidimensional spectrum, all of which belong to the same goal. The distribution depends on the number of transmit antennas and the coding.
  • Two transmission antennas with the same transmission power are selected as examples. Accordingly, in the spectrum, a total energy value of 2 occurs for a target. This total energy value is distributed across the various positions.
  • the first antenna is coded so that it maps to a single position. This position then includes the energy value 1.
  • the second antenna can have a coding that maps to two positions, so that an energy value 0.5 falls in two positions.
  • the coding sequence in particular its periodicity N, determines the number of positions to which the associated energy value is distributed in the spectrum.
  • the distribution of the total energy value over the different positions depends on the transmission energy of the transmission antennas and the chosen coding.
  • the transmit antennas can also have different transmit powers, so that the total energy value is no longer an integer.
  • the example corresponds to Total energy value when using 4 transmitting antennas, all of which transmit with the same power, a value of 4.
  • the number of positions depends on the coding sequence. With a periodicity of 2 the total energy value is divided into 2 different positions, with a periodicity from 4 to 4 different positions, etc. An energy value does not have to occur at every position.
  • the coding is chosen such that the energy distribution, in which each position has an energy value, is uniquely distributed over the positions. In other words, a defined energy value occurs for a target at the associated positions.
  • the energy values have a certain relationship to one another, so that conclusions can be drawn unambiguously and these can also be clearly assigned to the respective transmission antennas.
  • the coding is therefore only clear if it is achieved for a real measuring process that at least the ratio between at least two energy values in the spectrum can be clearly assigned to the expected energy distribution.
  • a target from the spectrum is determined based on the clear energy distribution.
  • an energy value can also be determined at a specific position and then verified whether the corresponding energy values are available at the associated further positions of the energy distribution.
  • corresponding ranges for the energy value can be defined for each position of the distribution, within which the actually measured energy values may lie. This allows external circumstances, such as noise, to be taken into account. If the energy value of all associated positions for a distribution lies within the associated areas, the target is accepted as correct. Otherwise the target is discarded.
  • a coding is assumed in which a total energy value is distributed from two to four positions in the spectrum.
  • a transmitting antenna is selected in such a way that it maps the energy value 1 to the first position in the spectrum.
  • the second antenna maps to the second and fourth positions with an energy value of 0.5 each.
  • the energy value is 0.
  • the energy distribution is [1, 0.5, 0, 0.5].
  • the spectrum is analyzed with particular advantage directly after the expected energy distribution for the goals.
  • At least one energy value of the energy distribution is selected or is zero in comparison with the energy values of the other positions with comparatively low energy.
  • At least one energy value is at least 50%, 70% or 90% smaller than the next largest energy value or the highest energy value.
  • At least one energy value is less than or equal to 0.4, 0.3, 0.2, 0.1, 0.05 or 0.
  • the energy value relates accordingly to the energy value of a transmitting antenna ne, which maps the spectrum with a value of 1.
  • low energy values can greatly improve the uniqueness of the evaluation.
  • the target can be optimally verified with such a low energy value at one position.
  • At least one transmission antenna has a coding sequence of the frequency ramps with a periodicity of N, the periodicity being greater than the number of transmission antennas.
  • a plurality of transmitting antennas advantageously have such a coding sequence.
  • the total energy value of all transmit antennas is selected such that an at least low energy value is provided for at least one position with respect to the distribution over the individual positions, which depends on the coding.
  • the periodicity is chosen to be greater than the number of transmit antennas, the total energy value can be distributed over correspondingly more positions, so that one or some of the positions also have low energy values, which enable a clear evaluation.
  • the periodicity is chosen larger than the number of transmit antennas for a plurality of transmit antennas. In particular, at least one third, half or three quarters of the transmission antennas have a periodicity that is greater than the number of transmission antennas.
  • the periodicity for one or more transmit antennas is at least twice as large as the number of transmit antennas.
  • the transmit antennas transmit with different transmit power.
  • the transmission power for the successive frequency ramps can be identical or can vary. If you combine the defined choice of the mean transmission power for the individual transmission antennas with a favorable coding, the distribution of the total energy value over the different positions in the spectrum can be selected in such a way that the clear evaluation of the targets is even more robust. Accordingly, each transmitting antenna can transmit the radar radiation with a different transmission power.
  • the transmission power of the transmission antenna is also varied on successive frequency ramps.
  • the object is also achieved by a radar according to claim 9.
  • the radar is designed to carry out the procedure described above and also in the following. In particular, this can be carried out in accordance with at least one of the explanations given above and also below.
  • Fig. 4 flow chart for the method.
  • the method is described using a MIMO radar that works according to the FMCW method.
  • the spectra shown represent the results of a simulation for a single static target within the field of view of the radar.
  • the radar only comprises two transmitting antennas, each of which emits several frequency ramps in succession at uniform time intervals within a measurement cycle.
  • the outside of the frequency ramps corresponds to a first step 100 of the method, the individual steps of the method being shown in FIG. 4.
  • the radar beams emitted in the form of frequency ramps can be reflected on an object, in particular on a scattering center.
  • a single static target is selected which has a relative speed of zero compared to the radar.
  • the reflected radar beams are detected by a plurality of reception antennas as reception signals.
  • the received signals are processed in the usual way in order to provide a spectrum according to step 120.
  • the spectrum can basically resolve over one or more dimensions, such as distance, speed, azimuth angle or elevation angle. 1 and 2 simulated one-dimensional spectra are shown, which serve to further explain the method.
  • the spectra represent the result for a single target, which has a relative speed of 0 km / h compared to the radar.
  • a one-dimensional resolution is chosen in favor of a simple and descriptive explanation of the method.
  • a plurality of targets are detected within a field of view of the radar and the resolution takes place over several dimensions, in particular distance, speed, azimuth angle and elevation angle.
  • a normalized frequency is plotted, which corresponds to a speed of the target or can be converted into a relative speed.
  • the energy is plotted against the Y axis 12.
  • some frequency ramps 54, 56 are shown, which are emitted by the two transmission antennas Tx1 and 1x2.
  • the time is plotted against the X axis 50 and the frequency is plotted against the Y axis 52.
  • a frequency ramp 54, 56 corresponds to a radar signal that begins at a start frequency and ends with an end frequency that differs from the start frequency.
  • the frequency of the frequency ramps 54, 56 increases linearly from a start frequency to the end frequency.
  • the frequency ramps 54, 56 are emitted for each transmitting antenna at regular intervals.
  • the frequency ramps are transmitted under coding.
  • the start phases f 1 of the frequency ramps 54 of the transmission antenna Tx1 and the start phases f 2 of the frequency ramps 56 of the transmission antenna Tx2 are varied.
  • the start phase is the phase position which the frequency ramp has at the start of the transmission, that is to say at the start frequency.
  • more than two transmit antennas can be formed, each transmit antenna emitting its frequency ramp with its own coding sequence.
  • FIG. 1 The spectrum of FIG. 1, which is represented by line 30, results with reference to a target which has a relative speed of 0 km / h with respect to the radar, the transmitting antenna Tx1 having a coding sequence of [0000].
  • the start phase f 1 is identical for all successive frequency frames. In particular, the start phase is 0 °.
  • the coding sequence of the transmitting antenna Tx2 is [0001]. This corresponds to a periodicity of 4, since four frequency ramps are necessary for the passage of the coding sequence.
  • the coding sequence is applied periodically, ie repetitively, to the frequency ramps of the transmission antenna Tx2.
  • the start phase ⁇ p 2 corresponds to a start phase of 0 ° for successive frequency ramps with a value of 0 and a start phase of 180 ° for value 1.
  • BPSK binary phase shift keying
  • PSK phase shift keying
  • PSK phase shift keying
  • the transmitting antenna Tx1 generates an energy value at a position 32 within the spectrum, which represents an absolute maximum for the spectrum.
  • the transmit antenna Tx2 generates corresponding and essentially identical energy values at positions 34, 36 and 38. Overall, the total energy emitted by the transmitting antennas is divided into positions 32, 34, 36 and 38. The spectrum is now evaluated, the energy values of the individual positions identifying the transmitting components of transmitting antenna Tx1 and transmitting antenna Tx2.
  • Such a spectrum is shown on the line 40 in FIG. 2.
  • the coding sequence of the transmitting antenna Tx1 is identical to that in FIG. 1.
  • the coding sequence of the transmitting antenna Tx2 is [0011].
  • the total energy value of the transmit antennas is distributed to positions 42, 44, 46 and 48, the largest energy value at position 44 and two essentially identical energy values at positions 44 and 48.
  • At position 46 at a normalized frequency of 0.5 no energy components were shown. Due to the chosen coding, the distribution of the total energy value in the spectrum is known.
  • the associated energy distribution is [1, 0.5, 0, 0.5]. This makes it possible to verify whether the energy values at the respective positions have been correctly determined for the further evaluation of the azimuth and / or elevation angle.
  • the target With a suitable choice of energy ranges for the individual positions of the energy distribution, the target can nevertheless be correctly recognized and its position and relative speed in the field of view of the radar can be correctly determined.
  • the target is accepted as correct if the determined energy values at the positions lie within the energy range.
  • the energy areas can be fixed static areas.
  • the energy ranges can also be fundamentally can also be determined separately for each distribution by using an algorithm
  • the distribution of the total energy values of the transmitting antennas in the spectrum can be set in such a way that the goals are clearly and correctly evaluated. In this way, erroneous detection of targets can be reduced by more than 10% compared to the method of the prior art.
  • a coding when using 4 transmit antennas that provide a total energy value of 4 within a spectrum for a target, a coding can be used that has an energy distribution of [1; 0.5; 0.5; 0.5; 0; 0.5; 0.5; 0.5] ready.
  • the first position has an energy value of 1
  • the second position has an energy value of 0.5
  • the third position has an energy value of 0.5
  • the fourth position has an energy value of 0.5
  • the fifth position has an energy value of 0, etc.
  • the corresponding positions and their energy values can be used to verify whether the target has been correctly determined.
  • the target can be determined directly via the energy distribution of the energy values for the corresponding positions.
  • a periodicity of 8 is used for a coding sequence. For example, if a target with an energy distribution of [1; 0.43; 0.59; 0.55; 0.08; 0.52; 0.48; 0.5] so the ses could be accepted as correct.
  • the number of positions and / or the periodicity of at least one or more transmit antennas is advantageously greater than the number of transmit antennas. Due to the larger number of positions compared to the number of transmit antennas, a distribution of the total energy value can take place, in which comparatively low energy values also occur. It is therefore generally advantageous if the number of positions or the periodicity is at least twice as large as the number of transmit antennas. With 16 transmit antennas, a coding with 32 positions is advantageously chosen. The distribution can be such that the energy value for one or more positions is zero or has only comparatively small values. With regard to a transmission antenna with a transmission energy of 1, this can be selected, for example, as an energy value of 0.4, 0.3, 0.2, 0.1, 0.05 or 0. The individual transmission antennas can also be operated with different transmission power in order to provide correspondingly clear distributions of the total energy value in the spectrum.
  • a target is accordingly determined on the basis of the clear energy distribution according to step 130. This ensures that the determined target is a real and correctly detected target.

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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)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un procédé pour un radar MIMO pour la détermination claire de cibles. Le radar comporte plusieurs antennes d'émission et plusieurs antennes de réception. Chaque antenne d'émission envoie plusieurs rampes de fréquence (54, 56) se suivant chronologiquement les unes les autres. Les phases de lancement (φ1, φ2) de rampes de fréquence se suivant les unes les autres des antennes d'émission varient conformément à un codage périodique. Les antennes de réception détectent les rampes de fréquence (54, 56) réfléchies sur une cible en tant que signaux de réception. Les signaux de réception sont traités pour fournir un spectre (40). L'énergie d'une cible détectée est répartie à l'intérieur du spectre (40) du fait du codage sur plusieurs positions (42, 44, 46, 48). Le codage est choisi de telle manière que la répartition d'énergie, à laquelle chaque position (42, 44, 46, 48) présente une valeur d'énergie, est répartie clairement sur les positions (42, 44, 46, 48). Une cible est déterminée à partir du spectre (40) à l'aide de la répartition d'énergie claire. De plus, l'invention décrit un radar qui utilise ledit procédé.
PCT/EP2019/084072 2018-12-10 2019-12-06 Procédé pour un radar mimo pour la détermination claire de cibles, et radar Ceased WO2020120334A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018221282.1A DE102018221282A1 (de) 2018-12-10 2018-12-10 Verfahren für ein MIMO-Radar zur eindeutigen Ermittlung von Zielen sowie ein Radar
DE102018221282.1 2018-12-10

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WO2020120334A1 true WO2020120334A1 (fr) 2020-06-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023212061A1 (de) * 2023-12-01 2025-06-05 Zf Friedrichshafen Ag Rechenvorrichtung zur Auswertung von Radardaten zumindest eines MIMO-Radar-Sensors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016479A1 (de) * 2009-04-06 2010-10-14 Conti Temic Microelectronic Gmbh Radarsystem mit Verfahren zur Vermeidung von durch Störeinstrahlungen bzw. -einkopplungen verursachten Fehlreaktionen
EP2876460A1 (fr) * 2013-11-26 2015-05-27 Autoliv Development AB Radar de véhicule avec deux agencements d'antenne d'émetteur
WO2018137835A1 (fr) * 2017-01-30 2018-08-02 Valeo Schalter Und Sensoren Gmbh Procédé pour déterminer au moins une information sur au moins un objet détecté par un système de radar en particulier d'un véhicule, système de radar et système d'aide à la conduite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016479A1 (de) * 2009-04-06 2010-10-14 Conti Temic Microelectronic Gmbh Radarsystem mit Verfahren zur Vermeidung von durch Störeinstrahlungen bzw. -einkopplungen verursachten Fehlreaktionen
EP2876460A1 (fr) * 2013-11-26 2015-05-27 Autoliv Development AB Radar de véhicule avec deux agencements d'antenne d'émetteur
WO2018137835A1 (fr) * 2017-01-30 2018-08-02 Valeo Schalter Und Sensoren Gmbh Procédé pour déterminer au moins une information sur au moins un objet détecté par un système de radar en particulier d'un véhicule, système de radar et système d'aide à la conduite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023212061A1 (de) * 2023-12-01 2025-06-05 Zf Friedrichshafen Ag Rechenvorrichtung zur Auswertung von Radardaten zumindest eines MIMO-Radar-Sensors

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