Abstract: A method for determining at least one object information item of at least one target object (18) which is sensed with a radar system (12), in particular of a vehicle (10), a radar system (12) and a driver assistance system (20) are described. In the method, transmission signals (32a, 32b) are transmitted into a monitoring range (14) of the radar system (12) with at least one transmitter (26a, 26b). Echoes, which are reflected at the at least one target object (18), of the transmission signals (32a, 32b) are received as received signals (34a, 34b) with at least one receiver (30), and if necessary are converted into a form which can be used by an electronic control and/or evaluation device (28). The received signals (34a, 34b) are subjected to at least one multi-dimensional discrete Fourier transformation. At least one target signal is determined from the result of the at least one Fourier transformation. At least one object information item is determined from the at least one target signal.

Abstract: A method for detecting a screening of a sensor device of a motor vehicle by an object. The method includes receiving at least one echo signal, captured by the sensor device, that characterizes a spacing between the sensor device and the object, determining a capture region for the sensor device based on the at least one received echo signal, checking whether the capture region is being screened by the object at least in some regions, assigning the at least one echo signal to a discrete spacing value from multiple discrete spacing values, determining, for each discrete spacing value a power value based on the echo signal, and deciding, by a classifier based on the power values, whether a predetermined proportion of the capture region is being screened by the object.

Abstract: A method for determining at least one object information item of at least one target object (18) which is sensed with a radar system (12), in particular of a vehicle (10), a radar system (12) and a driver assistance system (20) are described. In the method, transmission signals (32a, 32b) are transmitted into a monitoring range (14) of the radar system (12) with at least one transmitter (26a, 26b). Echoes, which are reflected at the at least one target object (18), of the transmission signals (32a, 32b) are received as received signals (34a, 34b) with at least one receiver (30), and if necessary are converted into a form which can be used by an electronic control and/or evaluation device (28). The received signals (34a, 34b) are subjected to at least one multi-dimensional discrete Fourier transformation. At least one target signal is determined from the result of the at least one Fourier transformation. At least one object information item is determined from the at least one target signal.

Abstract: The invention relates to a method for classifying an object (6) in a lateral surrounding area (5) of a motor vehicle (1), in which a signal is transmitted into the lateral surrounding area (5) by a sensor device (3) on-board the vehicle for monitoring the lateral surrounding area (5) and the signal reflected at the object (6) is received by said sensor device (3), wherein a monitoring area (E) of the sensor device (3) for monitoring the lateral surrounding area (5) is segmented into a first detection area (E1) and a second detection area (E2), wherein a first value for a distance (AL) from the object (6) to the motor vehicle (1) is defined on the basis of the signal received from the first detection area (E1) and it is determined whether the object (6) is a stationary object located laterally in relation to the motor vehicle (1), a second value for the distance (AL) from the object (6) to the motor vehicle (1) is determined on the basis of the signal received from the second detection area (E2) and it is defi

Abstract: The invention relates to a method for classifying an object (6) in a lateral surrounding area (5) of a motor vehicle (1), in which a signal is transmitted into the lateral surrounding area (5) by a sensor device (3) on-board the vehicle for monitoring the lateral surrounding area (5) and the signal reflected at the object (6) is received by said sensor device (3), wherein a monitoring area (E) of the sensor device (3) for monitoring the lateral surrounding area (5) is segmented into a first detection area (E1) and a second detection area (E2), wherein a first value for a distance (AL) from the object (6) to the motor vehicle (1) is defined on the basis of the signal received from the first detection area (E1) and it is determined whether the object (6) is a stationary object located laterally in relation to the motor vehicle (1), a second value for the distance (AL) from the object (6) to the motor vehicle (1) is determined on the basis of the signal received from the second detection area (E2) and it is defi

Abstract: The invention relates to a method for operating a radar sensor (5, 6) of a motor vehicle (1), in which for detecting a target object (12) in an environment of the motor vehicle (1), a transmit signal (S) is emitted by means of the radar sensor (5, 6) and an echo signal reflected on the target object (12) is received as a received signal, wherein a plurality of sequences (13) each including a plurality of frequency-modulated chirp signals (14) is emitted one after the other by means of the radar sensor (5, 6) as the transmit signal (S), and wherein a transmission pause (15) respectively follows each sequence (13), in which the radar sensor (5, 6) does not emit any chirp signals (14). The period of time of the transmission pauses (15) is respectively randomly adjusted in the operation of the radar sensor (5, 6).

Abstract: The invention relates to a method for detecting a screening of a sensor device (4) of a motor vehicle (1) by an object (8), in which at least one echo signal, captured by the sensor device (4), that characterizes a spacing between the sensor device (4) and the object (8) is received (S1) by means of a computing device (3), a capture region (E) for the sensor device (4) is determined, and on the basis of the at least one received echo signal it is checked whether the capture region (E) of the sensor device (4) is being screened by the object (8), at least in some regions, wherein the at least one echo signal is assigned by means of the computing device (3) to a discrete spacing value (B1, B2, B3) from a plurality of discrete spacing values (B1, B2, B3), for each of the discrete spacing values (B1, B2, B3) a power value (P) is determined (S2) on the basis of the echo signal, and on the basis of the power values (P) a decision is made by means of a classifier as to whether at least a predetermined proportion of

Abstract: A method for setting a detection threshold for a received signal of a frequency-modulated continuous-wave radar sensor of a motor vehicle is disclosed. In successive measuring cycles of the radar sensor in each case a radar signal is emitted into a capture zone of the radar sensor and a received signal is received, in each measuring cycle a frequency spectrum relating to the respective received signal is determined, wherein individual frequency bins of the frequency spectrum each correspond to a signal level in a range-resolution cell, and the detection threshold is set individually in each case for a subset consisting of at least one frequency bin, and in order to set the detection threshold, a noise level is determined from frequency bins of temporally preceding measuring cycles and/or from frequency bins of adjacent Doppler-resolution cells of the frequency spectrum.

Abstract: A method for the output of a warning signal for warning the driver of a motor vehicle about the presence of a vehicle-external target object in a warning region, which is prescribed in relation to the motor vehicle, by means of a driver assistance system of the motor vehicle, in which a radar sensor is used to transmit electromagnetic radar signals into a sensing region of the radar sensor in each of successive measurement cycles of the radar sensor and to receive received signals, the received signals are used for detection of the target object by means of the radar sensor and for tracking said target object in the sensing region over the measurement cycles, and, if the target object enters the prescribed warning region, the warning signal is output by means of an output device.

Abstract: A method for the output of a warning signal for warning the driver of a motor vehicle about the presence of a vehicle-external target object in a warning region, which is prescribed in relation to the motor vehicle, by means of a driver assistance system of the motor vehicle, in which a radar sensor is used to transmit electromagnetic radar signals into a sensing region of the radar sensor in each of successive measurement cycles of the radar sensor and to receive received signals, the received signals are used for detection of the target object by means of the radar sensor and for tracking said target object in the sensing region over the measurement cycles, and, if the target object enters the prescribed warning region, the warning signal is output by means of an output device.

Abstract: A method for unambiguous determination of a range to and/or of a relative velocity of an object with respect to a motor vehicle is disclosed. An unambiguity area (RUn) for the range and/or an unambiguity area (VUn) for the relative velocity may be determined by means of a frequency-modulation continuous-wave radar in the motor vehicle, with a predetermined sequence of frequency-modulated signal pulses being transmitted by the frequency-modulation continuous-wave radar in a measurement cycle. Mutually different unambiguity areas (RUn) for the range and/or mutually different unambiguity areas (VUn) for the relative velocity are defined for at least two successive measurement cycles, and the range and/or the relative velocity are/is determined on the basis of, in each case, at least one measured value for the range and/or for the relative velocity from each measurement cycle.

Abstract: A method for setting a detection threshold for a received signal of a frequency-modulated continuous-wave radar sensor of a motor vehicle is disclosed. In successive measuring cycles of the radar sensor in each case a radar signal is emitted into a capture zone of the radar sensor and a received signal is received, in each measuring cycle a frequency spectrum relating to the respective received signal is determined, wherein individual frequency bins of the frequency spectrum each correspond to a signal level in a range-resolution cell, and the detection threshold is set individually in each case for a subset consisting of at least one frequency bin, and in order to set the detection threshold, a noise level is determined from frequency bins of temporally preceding measuring cycles and/or from frequency bins of adjacent Doppler-resolution cells of the frequency spectrum.

Abstract: The invention relates to a driver assistance device (2) for a vehicle (1), which driver assistance device has a radar appliance (3, 4) for determining at least one measured variable (?1, ?2, R1, R2) referenced to an object (10) that is external to the vehicle, wherein the radar appliance (3, 4) comprises: at least a first and a second reception antenna (14, 15), each for receiving signals (SE1, SE2), a first down-converter (17), which is coupled to the first reception antenna (14) via a first reception path (16), and a second down-converter (23), which is coupled to the second reception antenna (15) via a second reception path (21), each for down-converting the received signals (SE1, SE2) into respective baseband signals (SB1, SB2), and a control device (5) for receiving the baseband signals (SB1, SB2) and for determining the at least one measured variable (?1, ?2, R1, R2) using the baseband signals (SB1, SB2), wherein the radar appliance (3, 4) has test means (32) for producing a local check signal (SP)

Abstract: The invention relates to a method for operating a radar sensor (5, 6) of a motor vehicle (1), in which for detecting a target object (12) in an environment of the motor vehicle (1), a transmit signal (S) is emitted by means of the radar sensor (5, 6) and an echo signal reflected on the target object (12) is received as a received signal, wherein a plurality of sequences (13) each including a plurality of frequency-modulated chirp signals (14) is emitted one after the other by means of the radar sensor (5, 6) as the transmit signal (S), and wherein a transmission pause (15) respectively follows each sequence (13), in which the radar sensor (5, 6) does not emit any chirp signals (14). The period of time of the transmission pauses (15) is respectively randomly adjusted in the operation of the radar sensor (5, 6).

Abstract: Presented is a method for determining speeds (vr14, vr16) and distances (r14, r16) of objects (14, 16) relative to a radar system (12) of a motor vehicle (10), wherein a coverage area (EB) of the radar system (12) is divided into at least two part-areas (TB1, TB2, TB3), the coverage area (EB) is examined for reflecting objects (14, 16) in successive measuring cycles (MZ1, MZ2; MZi, MZi+1), wherein radar signals received in a measuring cycle (MZ1, MZ2; MZi, MZi+1) are processed separated in accordance with part-areas (TB1, TB2, TB3) and processed signals are assembled to form a total result differentiated in accordance with spatial directions. The method is characterized in that from signals received in a first measuring cycle (MZ1; MZi), hypotheses for the distance (r14, r16) and speed (vr14, vr16) of reflecting objects (14, 16) are formed and the hypotheses are validated in dependence on signals received in at least one further measuring cycle (MZ2; MZi+2).

Abstract: Plug connections on radar sensors include plug pins which are inserted into plastic. The plastic that surrounds the plug pins is at least partially provided with a granulate that absorbs radar waves, such that the electrical impedance of the plastic has a high value in low-frequency range, and the plastic comprises a characteristic which absorbs radar waves in a region of higher-frequency radar waves. The plug pins are surrounded by a thin layer of plastic without radar-absorbent granulate, and a remainder of an area surrounding the plug pins includes the plastic with the granulate which absorbs radar waves.

Abstract: The invention relates to a driver assistance device (2) for a vehicle (1), which driver assistance device has a radar appliance (3, 4) for determining at least one measured variable (?1, ?2, R1, R2) referenced to an object (10) that is external to the vehicle, wherein the radar appliance (3, 4) comprises: at least a first and a second reception antenna (14, 15), each for receiving signals (SE1, SE2), a first down-converter (17), which is coupled to the first reception antenna (14) via a first reception path (16), and a second down-converter (23), which is coupled to the second reception antenna (15) via a second reception path (21), each for down-converting the received signals (SE1, SE2) into respective baseband signals (SB1, SB2), and a control device (5) for receiving the baseband signals (SB1, SB2) and for determining the at least one measured variable (?1, ?2, R1, R2) using the baseband signals (SB1, SB2), wherein the radar appliance (3, 4) has test means (32) for producing a local check signal (SP)

Abstract: The invention relates to a method for unambiguous determination of a range to and/or of a relative velocity of an object with respect to a motor vehicle (1) by means of a frequency-modulation continuous-wave radar (3, 4) in the motor vehicle (1), with a predetermined sequence of frequency-modulated signal pulses (23) being transmitted by the frequency-modulation continuous-wave radar (3, 4) in a measurement cycle, by means of which sequence an unambiguity area (RUn) is determined for the range, and/or an unambiguity area (VUn) is determined for the relative velocity, wherein mutually different unambiguity areas (RUn) for the range and/or mutually different unambiguity areas (VUn) for the relative velocity are defined for at least two successive measurement cycles, and the range and/or the relative velocity are/is determined on the basis of in each case at least one measured value for the range and/or for the relative velocity from each measurement cycle.

Abstract: Plug connections are proposed on radar sensors having plug pins which are inserted into plastic, in which the plastic (5, 6; 11) which surrounds the plug pins (4) is at least partially provided with a granulate which absorbs radar waves, such that the electrical impedance of the plastic (5; 11) has a high value in the low-frequency range, and the plastic (6) has a characteristic which absorbs radar waves in the region of higher-frequency radar waves. For this purpose, the plug pins (4) can be surrounded by a layer of plastic (5; 11) without radar-absorbent granulate, and the rest of the area surrounding the plug pins (4) consists of the plastic (6) with the granulate which absorbs radar waves.

Abstract: Presented is a method for determining speeds (vr14, vr16) and distances (r14, r16) of objects (14, 16) relative to a radar system (12) of a motor vehicle (10), wherein a coverage area (EB) of the radar system (12) is divided into at least two part-areas (TB1, TB2, TB3), the coverage area (EB) is examined for reflecting objects (14, 16) in successive measuring cycles (MZ1, MZ2; MZi, MZi+1), wherein radar signals received in a measuring cycle (MZ1, MZ2; MZi, MZi+1) are processed separated in accordance with part-areas (TB1, TB2, TB3) and processed signals are assembled to form a total result differentiated in accordance with spatial directions. The method is characterized in that from signals received in a first measuring cycle (MZ1; MZi), hypotheses for the distance (r14, r16) and speed (vr14, vr16) of reflecting objects (14, 16) are formed and the hypotheses are validated in dependence on signals received in at least one further measuring cycle (MZ2; MZi+2).