Robert Boschgmbh

Georgia Tech Research Corporation

Robert Bosch Gmbh

Benedikt Loesch

Michael Schoor

Volker Gross

Goetz Kuehnle

Marcel Mayer

Arthur Hipke

Klaus Baur

Hermann Buddendick

Matthias Steinhauer

Stefan Heilmann

Kilian Rambach

Rolf Noethlings

Antoine Chabaud

Maija Chabaud

Mehran Pourmousavi

Stefan Chittka

Gil Weinberg

Andrew Beck

A radar device. The radar device includes a transceiver apparatus that comprises at least three transmit antennas and at least three receive antennas or comprises at least two transmit antennas and at least two receive antennas having two-dimensional beam forming, wherein the transceiver apparatus is configured to emit radar radiation using the transmit antennas, to receive radar radiation using the receive antennas, and to generate radar data on the basis of the received radar radiation. The radar device further comprises an evaluation apparatus that is configured to establish whether radar radiation has propagated between the transceiver apparatus and the at least one target either directly or at least partly by way of at least one reflection by evaluating the radar data using a multitarget angle estimation model, wherein the multitarget angle estimation model takes the propagation of radar radiation along at least four paths into consideration.

Radar device and radar method

A method and device for determining a relative velocity of a radar target. An FMCW radar measurement is carried out in which a ramp-shaped frequency-modulated transmit signal is sent whose modulation pattern includes a first sequence of ramps succeeding one another offset by a time interval and at least one further sequence of ramps succeeding one another offset by the same time interval, the sequences being temporally interleaved. Received signals are mixed down to baseband signals. From the baseband signals, a two-dimensional spectrum is calculated separately for each of the sequences by two-dimensional Fourier transformation, transformation taking place ramp for ramp in the first dimension and transformation taking place via a ramp index in the second dimension. Based on the positions of a peak in at least two of the two-dimensional spectra of the baseband signals, a value is determined for the relative velocity of a radar target.

Radar measurement method

A MIMO radar sensor including an array of transmitting antenna elements and receiving antenna elements that are offset relative to one another in a predefined direction, and including at least two electronic chips that are associated with different selections of the transmitting antenna elements and receiving antenna elements. At least one receiving antenna element is connectable to both chips, and the array includes at least one configuration of antenna elements that is made up of a transmitting antenna element with which the chip is associated, a receiving antenna element with which the chip is associated, a transmitting antenna element with which the chip is associated, and a receiving antenna element with which the chip is associated, and in which configuration the offset between the transmitting antenna elements matches the offset between the receiving antenna elements.

MIMO radar sensor including synchronized high-frequency chips

A method for the phase calibration of a MIMO radar sensor having an array of transmitting and receiving antenna elements that are offset from each other in at least one direction, and high-frequency modules, which are each assigned to a part of the array. The array is subdivided into transmitting subarrays and receiving subarrays in such a manner, that each subarray is assigned to exactly one of the high-frequency modules and at least two receiving subarrays, which belong to different high-frequency modules, are offset from each other in the at least one direction and are aligned with each other in the direction perpendicular to it. The method includes a calibration which corrects a receiving control vector with the aid of a known relationship between first and second comparison variables for the respective receiving subarrays.

Method for calibrating a MIMO radar sensor for motor vehicles

A MIMO radar sensor includes: an antenna arrangement including first and second arrays, in each of which a respective plurality of antennas are offset relative to one another in a first direction, the first and second arrays being offset from each other in a second direction that is perpendicular to the first direction, the antennas of the first and second arrays being more strongly focused in the second direction than in the first direction in each case, and, in each of at least one of the first and second antenna arrays, at least two of the antennas of the respective array being offset from one another in the second direction and the antennas of the respective array being symmetrically arranged relative to an axis running in the second direction; a high frequency element; and a control and evaluation device for evaluating output from the high frequency element regarding the antennas.

MIMO radar sensor

A MIMO radar sensor for motor vehicles, having an antenna assemblage on a rectangular circuit board whose edges define a y direction and a z direction. The antenna assemblage includes at least two arrays of transmitting antennas and at least two arrays of receiving antennas. Transmitting antennas within each array are offset from one another in a z direction, and the two arrays of the transmitting antennas are offset from one another in a y direction. The receiving antennas within each array are offset from one another in a y direction, and the two arrays of the receiving antennas are offset from one another in a z direction. A high-frequency module is disposed in a central region of the circuit board between the arrays of the transmitting and receiving antennas.

MIMO radar sensor for motor vehicles

An improved evaluation of radar signals, in particular radar signals received by a Uniform Linear Array (ULA) antenna. Through the application of a plurality of different beamformings to the radar signals, drops in the gain can be compensated by the beamforming.

Method and device for evaluating radar signals

An estimation is described of the speed of objects with the aid of a radar sensor that includes multiple transmitting antennas. Multiple nested sequences of frequency ramps are emitted with the aid of multiple transmitting antennas. An individual phase encoding takes place for each transmitting antenna with the aid of a harmonic code. For estimating the speed of the object, the ambiguities due to the code multiplex are resolved.

Radar sensor and method for determining a relative speed of a radar target

A method for evaluating an angular position of an object recognized on the basis of radar data, the radar data being ascertained by a radar device. The method includes: ascertaining of an intrinsic speed of the radar device; ascertaining a relative speed of the recognized object in relation to the radar device, using the ascertained radar data; ascertaining at least one angular test region using the ascertained intrinsic speed and the ascertained relative speed, the at least one angular test region corresponding to possible stationary objects that have a relative speed that substantially corresponds to the ascertained relative speed; and ascertaining whether an azimuth angle of the recognized object lies in the ascertained angular test region.

Method and device for evaluating the angular position of an object, and driver assistance system

A radar sensor system and a method for operating a radar sensor system. The radar sensor system includes: at least one first sub-sensor system and a second sub-sensor system, each for generating sensor data, each sub-sensor system including an antenna array including at least one receiving antenna and at least one transmitting antenna; a control device, by which each sub-sensor system is independently transferrable from a normal operation into a silent operation; and a data fusion device, which is designed to fuse the sensor data exclusively of the sub-sensor systems during the normal operation with one another for generating output data.

Radar sensor system and method for operating a radar sensor system

A method for signal evaluation in a locating system that includes multiple radar sensors whose locating ranges overlap one another. The method includes evaluating the signal of a first of the radar sensors and identifying distance cells that are not empty, for at least one of these distance cells: selecting a second of the radar sensors and determining a distance range in which the objects situated in the distance cell would have to be situated from the viewpoint of the second radar sensor, and classifying the object configuration in the distance range, based on the signal of the second radar sensor.

Method for signal evaluation in a locating system that includes multiple radar sensors

An analysis of radar signals, in particular of radar signals, which are received by a plurality of ULA antennas. By applying different beam formations to the radar signals of the individual ULA antennas, beamforming is used to compensate for dips in the gain.

Apparatus and method for analyzing radar signals

A method and an apparatus for recognizing an absorptive radome coating on an apparatus for emitting electromagnetic radiation and receiving partial radiation reflected at objects is disclosed. The radome covers at least one antenna of the apparatus. A mixer mixes a frequency-modulated transmission signal with the signal received by the at least one antenna, the mixed product of the mixer is subjected to analog-to-digital conversion, the digitized signal is transformed into a two-dimensional spectrum, and the two-dimensional spectrum is mapped with a transfer function. The two-dimensional spectrum that was mapped with the transfer function is correlated with correlation matrices in order to carry out pattern recognition.

Method and apparatus for recognizing an absorptive radome coating

A method for calibrating two receiving units of a radar sensor that includes an array of receiving antennas formed by two sub-arrays and an evaluation unit, which is designed to carry out an angle estimation for located radar targets based on phase differences between the signals received by the receiving antennas, each receiving unit including parallel reception paths for the signals of the receiving antennas of one of the sub-arrays. The method includes: analyzing the received signals and deciding whether a multi-target scenario or a single-target scenario is present, in the case of a single-target scenario, measuring phases of the signals received in the sub-arrays and calculating a phase offset between the two sub-arrays, and calibrating the phases in the two receiving units based on the calculated offset.

Method for the phase calibration of high-frequency components of a radar sensor

An apparatus for emitting electromagnetic radiation and receiving partial radiation reflected by objects, and determines the instantaneous performance of its system detection. The apparatus includes a device for emitting a frequency-modulated transmit signal that has at least two signal sequences which have ramps, each succeeding one another in the frequency characteristic, with gaps in between, the signal sequences being interleaved with each other with a predetermined time offset so that in each case a first ramp of each of the signal sequences is output before a second ramp of one of the at least two signal sequences is output. The apparatus includes a mixer, an analog-to-digital converter, a transform device, and a device for detecting phase noise. The phase changes of the receive signals are compared over all two-dimensional spectra to a precalculated model, and the cause of the phase noise is ascertained with the aid of predetermined criteria.

Growing community of inventors

Stuttgart, Germany

Benedikt Loesch