Abstract: A radar sensor system including: a defined number of HF components; each HF component having at least one antenna for emitting and/or receiving radar waves and at least one antenna control for operating the at least one antenna; and a synchronization network that is connected to all HF components and via which an operating frequency of all HF components is synchronizable by at least one of the HF components.

Abstract: A sensor system for a vehicle, including a control unit, which is situated in the vehicle; multiple sensor units, which are situated on or in the vehicle and connected to the control unit, at least one of the sensor units being connected via a bidirectional connecting line for signal exchange or via a bidirectional connecting line and via a synchronization line to the control unit and being configured to receive a synchronization signal from the central control unit via the bidirectional connecting line or via the synchronization line to be operated by the control unit at a predefined point in time.

Abstract: An FMCW radar sensor having a plurality of antenna elements at a distance from one another in a row, to each of which is assigned a mixer, which produces an intermediate frequency signal, and an evaluation unit that is designed to record the intermediate frequency signal over a measurement period as a function of time and to convert the time signal into a spectrum, and having an angular measuring device in which the spectra obtained from the evaluation devices are evaluated in separate channels. The sensor further including a beamforming device to carry out a beamforming for the signal received from a specified preferred direction by compensating run length differences of the signal to the antenna elements, a summation device forming a sum spectrum through coherent addition of the spectra, and a distance measuring device determining distances of objects in the preferred direction on the basis of the sum spectrum.

Abstract: 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.

Abstract: A high-frequency circuit including a circuit board which bears at least one electronic component and a conductor structure, and including a waveguide structure manufactured separately from the circuit board. The waveguide structure is positioned on the circuit board in such a way that high-frequency signals are transferable between the conductor structure on the circuit board and the waveguide structure. The waveguide structure is held with the aid of press-fit pins on the circuit board.

Abstract: A radar device including a transceiver unit and a signal processing unit. The transceiver unit detects a first measuring range including distances from the radar device in a first predefined distance range and outputs first sensor signals. The transceiver unit detects a second measuring range including distances from the radar device in a second predefined distance range and outputs second sensor signals. The signal processing unit evaluates the first and second sensor signals. The first distance range at least partially differs from the second distance range. The distances of the second distance range are greater than a predefined minimum distance.

Abstract: A method and an apparatus for reducing the influence of interference in the evaluation of at least one received signal of a radar sensor, in particular of a radar sensor installed in a vehicle, is described. In predetermined operating situations, predetermined transmitted signals are emitted and reflected partial signals are received, and the signals received for the predetermined operating situations are stored in order to determine an interference spectrum and the influence of interference is reduced by taking the interference spectrum into consideration in the context of signal evaluation.

Abstract: A method for operating a radar sensor in a motor vehicle, in which in a SAR measuring mode according to the principle of the synthetic aperture, objects, including stationary objects, are located with high angular resolution. The same radar sensor is operated in time-shifted manner or concurrently in the SAR measuring mode and in a Doppler measuring mode, the relative speeds of objects, including moving objects, being measured with a time resolution in the Doppler measuring mode that is greater than the time resolution in the SAR measuring mode.

Abstract: A radar sensor for motor vehicles, having a signal generator that is configured to generate a radar signal that contains a cyclically repeating sequence of N wave trains, where j=1, . . . , N, which are transmitted successively at time intervals T?c,j and which occupy respective frequency bands that differ from one another in terms of their center frequencies fc,j, wherein the relationship applicable to the time intervals T?c,j and the center frequencies fc,j is: T?c,j*fc,j=X, where the parameter X is constant.

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 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 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 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.