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: 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 radar device including a transceiver unit that includes a plurality of receiving antennas and a plurality of transmitting antennas, a distance between at least two transmitting antennas being shorter than a greatest distance of distances between two receiving antennas, the transmitting antennas being vertically offset with respect to the receiving antennas. The radar device further includes a control unit, which is configured to activate the transceiver unit in order to operate the transceiver unit with the aid of a transmitting-side beam steering method.

Abstract: A radar device. The radar device includes a transceiver unit that includes at least three transmitting antennas and at least three receiving antennas, the transceiver unit being designed to emit radar radiation with the aid of the transmitting antennas, to receive radar radiation with the aid of the receiving antennas, and to generate radar data based on the received radar radiation. The radar device further includes an evaluation unit, which is configured to estimate, by evaluating the radar data, at least one angle of at least one target using a 2-target angle estimation model, the 2-target angle estimation model taking the propagation of the radar radiation along four paths into account.

Abstract: A radar device having a plurality of transmit antennas and a plurality of receive antennas. The radar device further comprises at least one high-frequency (HF) radar chip which is configured to generate a high-frequency signal and transmit it via the transmit antennas. The transmit antennas have an offset with respect to the receive antennas in a first direction and at least one transmit antenna has an overlap with at least one receive antenna in a second direction. The first direction is a vertical direction and the second direction a horizontal direction. Alternatively, the first direction is a horizontal direction and the second direction a vertical direction.

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 method for loss reduction in a communication interface having differential power loss as a function of a transmitted bit. A data format of transmitted data and/or a data format of address data that characterize the addresses of communication subscribers is selected as a function of the expected number of bits having higher power loss and/or the expected number of bits having lower power loss in the data, in such a way that the number of bits having lower power loss is increased.

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 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 device for emitting and receiving electromagnetic radiation, in which different antennas are used for the emitting and receiving, a first antenna or first group being used for the transmission in a first polarization form, a second antenna or second group being used for the transmission in a second polarization form, and a third antenna or third group being used for receiving the reflected electromagnetic radiation that was emitted by the first antenna or first group and by the second antenna or second group. The device may be fixed in place on a motor vehicle and used for object detection within the framework of a distance and speed control or a collision avoidance, and the polarimetric information obtained from the different receiving levels during the propagation of the two differently polarized electromagnetic waves via different propagation paths is able to be used for ascertaining a weather-related road condition.

Abstract: An assortment of radar sensors in different variant embodiments. Each radar sensor has: a housing terminated by a radome, a circuit board that is equipped on the side facing away from the radome with at least one radio-frequency module, and an antenna structure on the side of the circuit board facing the radome. The housing is realized identically in all variant embodiments. The antenna structure has a planar antenna structure in at least one variant embodiment, and has a hollow conductor structure in at least one variant embodiment.

Abstract: A radar system for surroundings detection of a motor vehicle. The radar system includes an antenna for sending and/or receiving radar signals, a circuit board including at least one high-frequency component and an element for sending and/or receiving high-frequency signals. At least one fastening element is situated on/at the circuit board. The antenna includes at least one connecting element. The connecting element interacts with the fastening element in such a way that the antenna is fastenable and at the same time positionable on the circuit board by being pushed onto the at least one fastening element.

Abstract: A radar sensor head for a radar system. The radar sensor head includes at least one transmitting antenna for generating and at least one receiving antenna for receiving radar waves; a preprocessing unit for defined preprocessing of received data; an interface for connecting the radar sensor head to a data line; and a calibration data unit for at least partially calibrating the transmitting antenna and/or the receiving antenna, calibration data for the transmitting antenna and the receiving antenna being stored using the calibration data unit.

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 a radar sensor, in particular a radar sensor for motor vehicles. The method includes the steps: determining, for particular evaluation channels that correspond to different central antenna positions of relevant transmitting antennas and receiving antennas in one direction, and for particular individual radar targets, a respective individual radial velocity of the particular radar target associated with the particular evaluation channel, based on signals obtained in respective evaluation channels; estimating a particular velocity of the particular radar target based on the determined individual radial velocities of the radar target, the velocity including information concerning a velocity in the forward direction in relation to the radar sensor, and a tangential velocity; and associating radar targets as belonging to an extended radar object as a function of the estimated velocities of the radar targets. A radar sensor is also described.

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 correcting a radar signal. The method includes the following steps: ascertaining main peaks in the spectrum of the radar signal; determining an auxiliary signal by removing the components of the main peaks in the radar signal; identifying regions of disturbance in the radar signal utilizing the auxiliary signal; and generating a corrected radar signal by interpolating the radar signal in the identified regions of disturbance of the radar signal, utilizing the main peaks through ascertained.

Abstract: A radar sensor for motor vehicles. The radar sensor includes an antenna arrangement having multiple antenna elements linearly arranged at uniform distances along a connecting line, the distance between each two adjacent antenna elements being equal to half of the mean wavelength ? of the emitted radar signal, and the arrangement including at least one triple of adjacent antenna elements, in which the two antenna elements located on the outside in the triple, on the one hand, and the interposed antenna element, on the other hand, originate in opposite directions from the connecting line. The antenna arrangement includes at least one pair of antenna elements which originate in opposite directions from the connecting line and whose distance from one another is an integer multiple of the wavelength ?, so that one of these antenna elements has a negative amplitude taper in relation to the antenna elements of the triple.

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: 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.