Abstract: 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.

Abstract: A MIMO radar sensor is described for motor vehicles as including an antenna array, which is angle-resolving in two directions perpendicular to each other and including multiple receiving antennas, which are situated offset from one another in a first of the two directions, and multiple transmitting antennas, and including a control and evaluation unit for activating the transmitting antennas and for evaluating signals of the receiving antennas. The antenna array includes at least three selectively activatable transmitting antennas, which are offset from one another both in the first direction as well as in the second direction, and the control and evaluation unit is designed for a two-dimensional angle estimation in the first direction and the second direction using the signals received when the transmitting antennas are activated differently.

Abstract: A method for operating a first radar sub-sensor and a second radar sub-sensor, in particular in a motor vehicle, the first radar sub-sensor being supplied with voltage by a first switching controller, and the second radar sub-sensor being supplied with voltage by a second switching controller, and the method includes the following steps: Operating the first switching controller at a first switching frequency; and operating the second switching controller at a second switching frequency, the first switching frequency differing from the second switching frequency.

Abstract: An angle-resolving radar sensor including an antenna array, which includes a number N of antenna elements offset relative to one another in a scanning direction, a digital beam forming device, and an angle estimating device, which is designed to estimate an angle on the basis of the signal of the beam forming device. The aperture A of the antenna array is greater than (N?1)/2 in units of the wavelength, and the center-to-center distances between the adjacent antenna elements differ from one another, but deviate by not more than a predetermined degree of the value A/(N?1).

Abstract: A radar system for a vehicle, having at least one central control unit for transmitting data and for processing received data, at least one radar sensor head, which is set apart from the at least one central control unit and has at least one transmitting antenna for generating and at least one receiving antenna for receiving radar waves. The radar system includes at least one data line between the at least one central control unit and the at least one radar sensor head, with the at least one data line having at least one security unit for the encryption, decryption and/or signing of measuring data or control instructions.

Abstract: 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.

Abstract: A radar sensor is described. The radar sensor includes at least two synchronously operating high frequency components, which each have at least one signal path in which the phase of the transmitted high frequency signal is varied by a temperature-dependent phase difference. In each high frequency component, a phase detector is connected in parallel to the signal path, which supplies a signal that assumes an extremum at a certain phase difference independently of the temperature, and a phase shifter is situated in the signal path, ith the aid of which the phase difference is settable in such a way that the signal of the phase detector assumes the extremum.

Abstract: 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.

Abstract: 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.

Abstract: A method for operating a radar sensor system including multiple radar sensors operating independently of one another in a motor vehicle, wherein the radar sensors are synchronized with one another with respect to their transmission times and transmission frequencies in such a way that two radar signals whose frequency separation is smaller than a certain minimum frequency separation are at no point in time transmitted simultaneously.

Abstract: 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.

Abstract: A method for monitoring an FMCW radar sensor and an FMCW radar sensor, including multiple local oscillators. In the method, a first local oscillator signal of a first local oscillator of the local oscillators is mixed in a mixer with a second local oscillator signal of a second local oscillator of the local oscillators to form a baseband signal. The baseband signal is evaluated. A fault is detected due to a result of the evaluation. Methods for monitoring an FMCW radar sensor and an FMCW radar sensor including multiple high frequency components are described which each include a transceiver part for outputting a transmit signal to at least one antenna assigned to the high frequency component and for receiving a receive signal from at least one antenna assigned to the high frequency component.

Abstract: A radar sensor system is described. The radar sensor system includes: at least two HF components each having at least one antenna for transmitting and/or receiving radar waves, and each having at least one antenna controller for operating the at least one antenna. The radar sensor system also includes a synchronization line by way of which the HF components are functionally connected, a length of the synchronization line being such that a detected target is representable in a baseband as a bin pair, the bins of the bin pair being offset from one another by a defined extent.

Abstract: An angle-resolving radar sensor for motor vehicles, having an antenna system having a plurality of antennas set up for receiving, configured in various positions in a direction in which the radar sensor is angle-resolving, and having a control and evaluation device designed for an operating mode in which at least one antenna of the radar sensor that is set up for transmitting sends out a signal that is received by a plurality of the antennas of the radar sensor that are set up to receive, the control and evaluation device being designed, in the mentioned operating mode, for an individual estimation of an angle of a radar target to determine respective individual distances of the radar target for each of the evaluation channels, which correspond to different configurations of transmitting and receiving antennas, and to use the individual distances in the estimation of the angle of the radar target.

Abstract: A method for operating multiple sensors of a vehicle in at least partially spatially coinciding detection areas and in a shared frequency domain. In the method, at a transmission point in time, at least two sensors transmit simultaneously on separate instantaneous frequencies separated by a frequency gap, the frequency gap including at least one instantaneous receive bandwidth of the sensors, each instantaneous frequency being blocked for a use by the sensors after the transmission point in time for the duration of a time gap, the time gap including at least one signal propagation time across a reception range of the sensors.

Abstract: An angle-resolving FMCW radar sensor, including multiple antenna elements in positions in a direction in which the radar sensor is angle-resolving and forming at least three transmitter arrays and at least one receiver array, and a control/evaluation device for an operating mode in which transmitter arrays periodically transmit signals whose frequency is modulated according to modulation ramps, and in which radar echoes of transmitted signals are received in by multiple antenna elements of the receiver array, and the located object angle is determined based on amplitude and/or phase relationships between radar echoes which correspond to different combinations of transmitter and receiver arrays. A measuring cycle of the radar sensor includes at least two periods in which in each case at least two combinations of transmitter and receiver arrays are alternated, and the combinations of transmitter and receiver arrays involved are different from one another for the at least two periods.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.