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 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: 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: 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 method for evaluating obstacles based on locating data of a radar sensor in a driver assistance system for motor vehicles, in which at least one evaluation function is calculated which indicates, as a function of a set of measured variables which are related to a potential obstacle, whether the potential obstacle is to be evaluated as a real obstacle, a complexity indicator being formed based on the locating data which indicates the complexity of a present measurement situation, and at least two different evaluation functions being defined for the same set of measured variables, and it being decided which of the evaluation functions is applied in the present measurement situation as a function of the complexity indicator.

Abstract: A radar sensor having a corresponding evaluation and control device, which has a measuring mode for locating radar targets and a blindness detection device, which is configured to detect blinding of the radar sensor with the aid of the signals received by the radar sensor itself; wherein the evaluation and control device has a test mode, in which the radar sensor is controlled on the basis of parameters that are different from the parameters for the measuring mode and optimized for the blindness detection device, and the evaluation and control device has a switching device for switching over between the measuring mode and the testing mode.

Abstract: An FMCW radar system is provided having a transceiver unit which is designed to transmit radar signals, which are modulated with the aid of at least one modulation parameter, and to receive radar signals, which are reflected from objects, and having an interference detector for detecting interferences in the received radar signals based on at least one frequency-dependent reception power threshold value corresponding to the particular modulation parameters, one of the modulation parameters being a modulation slope of the transmitted radar signal. An interference recognition method is also provided.

Abstract: An FMCW radar system is provided having a transceiver unit which is designed to transmit radar signals, which are modulated with the aid of at least one modulation parameter, and to receive radar signals, which are reflected from objects, and having an interference detector for detecting interferences in the received radar signals based on at least one frequency-dependent reception power threshold value corresponding to the particular modulation parameters, one of the modulation parameters being a modulation slope of the transmitted radar signal. An interference recognition method is also provided.

Abstract: FMCW radar sensor for motor vehicles, having at least one antenna element and a modulation device for feeding the antenna element using a frequency-modulated transmission signal, whose frequency periodically sweeps a frequency band, characterized in that the antenna element has multiple subelements, which are positioned in a vertical column and fed serially, and the modulation device is implemented for the purpose of variably setting the frequency position of the frequency band.

Abstract: A method for evaluating obstacles based on locating data of a radar sensor in a driver assistance system for motor vehicles, in which at least one evaluation function is calculated which indicates, as a function of a set of measured variables which are related to a potential obstacle, whether the potential obstacle is to be evaluated as a real obstacle, a complexity indicator being formed based on the locating data which indicates the complexity of a present measurement situation, and at least two different evaluation functions being defined for the same set of measured variables, and it being decided which of the evaluation functions is applied in the present measurement situation as a function of the complexity indicator.

Abstract: A method for detecting precipitation using a radar sensor system for motor vehicles designed for locating objects in the surroundings of the vehicle, in which method a locating signal that is a measure of the received power density as a function of the distance is integrated across a specific distance range lying below a limit distance for detecting precipitation. The locating signal is subjected to a filtering procedure before being integrated, the filtering procedure suppressing the peaks caused by located objects so that the filtered signal forms a measure of the noise level as a function of the distance.

Abstract: An FMCW radar sensor system is described having an antenna covered by a radome, a mixer for mixing a frequency-modulated transmission signal with a signal received by the antenna, a device for recording the mixed product of the mixer as a time-dependent signal, a device for calculating the spectrum of the time-dependent signal, and a device for detecting a reflecting coating on the radome, characterized in that the device for detecting the reflecting coating is configured for analyzing the time-dependent signal and for determining the extent of reflection on the radome based on the amplitude of this signal.

Abstract: A method for detecting icing at an angle-resolving radar sensor in a driver assistance system for motor vehicles, in which signals of a plurality of antenna elements each having a specific angle characteristic are compared with the corresponding angle characteristics, and the azimuth angle of a located object is determined on the basis of an angle fit quality which indicates how well the signals of the antenna elements correspond to the angle characteristics for a given azimuth angle, wherein an indicator for icing is formed which is a monotonically falling function of the angle fit qualities of the located objects, with objects having a low signal-to-noise ratio being included in the indicator at the most with a reduced weighting.

Abstract: A method for the detection of sensitivity losses of an FMCW radar locating device due to diffuse sources of loss, in which the radar locating device emits a transmit signal whose frequency is periodically modulated in successive modulation ramps, and at least one power characteristic of at least one frequency portion of a signal received by the radar locating device is evaluated, wherein the power of the transmit signal is varied cyclically, in each case after the completion of a modulation ramp, and the sensitivity losses are determined on the basis of differences in the power characteristics of signals received during successive modulation ramps having identical modulation.

Abstract: A method for detecting precipitation using a radar locating device for motor vehicles, that is designed to locate objects in the surroundings of the vehicle, in which method a locating signal (42), which is an index for the received power density as a function of the distance (R), is integrated over a first distance range (INT1), which is below a limit distance (Rlim) for the detection of precipitation, wherein the locating signal (42) is additionally integrated over a second distance range (INT2), which is above limit distance (Rlim), and for the detection of precipitation, the integrals over the first and second distance range are compared with each other.

Abstract: An FMCW radar system is provided having a transceiver unit which is designed to transmit radar signals, which are modulated with the aid of at least one modulation parameter, and to receive radar signals, which are reflected from objects, and having an interference detector for detecting interferences in the received radar signals based on at least one frequency-dependent reception power threshold value corresponding to the particular modulation parameters, one of the modulation parameters being a modulation slope of the transmitted radar signal. An interference recognition method is also provided.

Abstract: An FMCW radar sensor system is described having an antenna covered by a radome, a mixer for mixing a frequency-modulated transmission signal with a signal received by the antenna, a device for recording the mixed product of the mixer as a time-dependent signal, a device for calculating the spectrum of the time-dependent signal, and a device for detecting a reflecting coating on the radome, characterized in that the device for detecting the reflecting coating is configured for analyzing the time-dependent signal and for determining the extent of reflection on the radome based on the amplitude of this signal.

Abstract: FMCW radar sensor for motor vehicles, having at least one antenna element and a modulation device for feeding the antenna element using a frequency-modulated transmission signal, whose frequency periodically sweeps a frequency band, characterized in that the antenna element has multiple subelements, which are positioned in a vertical column and fed serially, and the modulation device is implemented for the purpose of variably setting the frequency position of the frequency band.

Abstract: A method for detecting icing at an angle-resolving radar sensor in a driver assistance system for motor vehicles, in which signals of a plurality of antenna elements each having a specific angle characteristic are compared with the corresponding angle characteristics, and the azimuth angle of a located object is determined on the basis of an angle fit quality which indicates how well the signals of the antenna elements correspond to the angle characteristics for a given azimuth angle, wherein an indicator for icing is formed which is a monotonically falling function of the angle fit qualities of the located objects, with objects having a low signal-to-noise ratio being included in the indicator at the most with a reduced weighting.

Abstract: A radar sensor having a corresponding evaluation and control device, which has a measuring mode for locating radar targets and a blindness detection device, which is configured to detect blinding of the radar sensor with the aid of the signals received by the radar sensor itself; wherein the evaluation and control device has a test mode, in which the radar sensor is controlled on the basis of parameters that are different from the parameters for the measuring mode and optimized for the blindness detection device, and the evaluation and control device has a switching device for switching over between the measuring mode and the testing mode.