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: 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 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 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 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 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: 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 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.

Abstract: An evaluation device for at least one radar sensor having an electronic unit which is designed to evaluate measuring signals of the radar sensor. The radar sensor is designed in such a way that, during its measuring cycles, it emits radar signals and to receive radar signals reflected from an area surrounding the radar sensor and outputs signals corresponding to the received reflected radar signals as measuring signals, while the radar sensor remains inactive for a predetermined pause time between two successive measuring cycles. The electronic unit is designed to perform a Fourier transform utilizing measuring signals from at least two different measuring cycles and/or utilizing evaluation signals derived from the measuring signals from at least two different measuring cycles. A corresponding method for evaluating at least one radar sensor is also described.

Abstract: A radar system for a vehicle, having at least one central control unit for sending data and for processing received data, at least one radar sensor head that is situated at a distance from the at least one central control unit and that has at least one transmit antenna for producing radar waves and at least one receive antenna for receiving radar waves, and having at least one data line between the at least one central control unit and the at least one radar sensor head, the at least one radar sensor head having an analog-digital converter for converting radar waves received by the at least one receive antenna into digital measurement data, and the external control unit having at least one analysis unit connected downstream from a data line for carrying out a processing step over at least a part of the digital measurement data.

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 radar sensor system having at least one transmitter device, all transmitter devices having a total of at least two transmit channels; and at least one receiver device, with all receiver devices having a total of at least two receive channels; a temperature sensor in each case for sensing the temperatures of the at least one transmitter device and the at least one receiver device, a modeling device for modeling at least one temperature dependency of the at least one transmitter device from the at least one receiver device; and a compensation device for compensating for the modeled temperature dependency.

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: A radar system for a vehicle. The radar system includes 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 central control unit and has 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, and having at least one data line between the at least one central control unit and the at least one radar sensor head, and the at least one radar sensor head has an analysis unit, connected downstream from an analog-to-digital converter and upstream from the at least one data line, for the at least partial processing of digital measuring data generated by the analog-to-digital converter.

Abstract: An antenna array for a radar sensor, having an antenna designed as a group antenna and operable as a transmit antenna and having an antenna configuration operable as a receive antenna, wherein the array has, in addition to the first antenna designed as a group antenna, a second antenna operable as a transmit antenna that has a smaller aperture than the first antenna, and the first and second antenna are designed for the transmission of radar waves having polarization orthogonal to one another, and the antenna configuration operable as a receive antenna is sensitive to both directions of polarization.

Abstract: A radar sensor system having a defined number of HF components, with each of the HF components having at least one antenna for transmitting and/or receiving of radar waves in each case, and at least one antenna control for operating the at least one antenna; and a synchronization network, which is connected to all HF components and via which an operating frequency of all HF components is able to be synchronized; with a synchronization master according to at least one defined criterion being able to be provided by all HF components.

Abstract: A radar sensor system for transmitting and receiving radar waves. The system includes a first sub-sensor having a first antenna and a first antenna control for operating the first antenna, and a second sub-sensor including a second antenna and a second antenna control for operating the second antenna. The system further includes a frequency-generating device having a clock pulse generator for generating a usable frequency and having a control unit for actuating and controlling the first antenna control, the second antenna control and the frequency-generating device, the frequency-generating device having a first clock pulse generator and a second clock pulse generator, the first clock pulse generator and the second clock pulse generator being able to be connected via at least two multiplexers to the first antenna control and the second antenna control for the supply of a usable frequency in each case.

Abstract: A radar sensor system having a defined number of HF components, each HF component having at least one antenna for transmitting and/or receiving radar waves and at least one antenna control for operating the at least one antenna, and a synchronization network to which all HF components are functionally connected and via which an HF signal is able to be provided to all HF components. At least two HF components have a respective self-supply device for feeding back a defined share of power of the HF signal able to be fed into the synchronization network. The HF signal for all HF components being able to be generated by a defined HF component at a defined instant, the radar sensor system being able to be functionally subdivided into at least two sub-sensor systems.