Abstract: A method for detecting interference in a received signal received by a radar sensor of a motor vehicle is disclosed. For detecting a target object in an environment of the motor vehicle, a transmit signal is emitted by the radar sensor, which includes a sequence of consecutive frequency-modulated chirp signals. The radar sensor then receives an echo signal reflected on the target object as the received signal with the superimposed interference. After receiving the received signal, the interference in the chirp signals of the received signal is detected.

Abstract: The invention relates to a motor vehicle with a radar device (3, 4) which is designed for detecting an object (25) located in a detection zone (7, 8) of the radar device (3, 4), wherein the detection zone (7, 8) is defined by an elevation angle zone (?1, ?2) and an azimuth angle zone (?), wherein the elevation angle zone (?1, ?2) also covers at least such a partial angle zone (?1) which lies within an angle interval of 15° to 90° above a horizontal (33) defined with respect to the motor vehicle (1).

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: 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 detecting interference in a received signal (s) received by a radar sensor (5, 6) of a motor vehicle (1) by means of an electronic computing device of the motor vehicle (1), wherein for detection of a target object (12) in an environment of the motor vehicle (1), a transmit signal including a sequence of consecutive frequency-modulated chirp signals is emitted by means of the radar sensor (5, 6) and an echo signal reflected on the target object (12) with the superimposed interference is received, and wherein after receiving the received signal (s) by the radar sensor (5, 6), the interference in the chirp signals of the received signal (s) is detected, wherein for detecting the interference within a chirp signal of the received signal (s), at least one sample of this chirp signal is compared to a sample of another chirp signal of the same sequence, and depending on the comparison, it is determined whether or not at least one of the samples compared to each other is affecte

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 an assistance system for motor vehicles (20), said system having a distance detection system (4) and a warning system (6), wherein provision is made of an evaluation unit (18) which combines items of information (12, 14, 16) obtained by the distance detection system (4) and by the warning system (6). The invention also relates to a method for operating an assistance system (2).

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: An apparatus and a method for determining a distance (r) to a target object (200) proposes transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said transmission signal (120a) reflected by a the target object (200) in the form of a reception signal (120c, 120d) by receiving device (111b) and evaluating the reception signal (120c, 120d) according a reference signal (1230b) which has a known phase difference with respect to the transmission signal (120a) and a frequency equal to the frequency thereof. The reference (120) and reception (120c, 120d) signal frequencies are reduced in a frequency divider (113) with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal (120b) and the reception (120c, 120d) signal in such a way that a reduced frequency reception signal (120b?) and a reduced frequency reception signal (120d) are obtained.

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: The invention relates to a motor vehicle with a radar device (3, 4) which is designed for detecting an object (25) located in a detection zone (7, 8) of the radar device (3, 4), wherein the detection zone (7, 8) is defined by an elevation angle zone (?1, ?2) and an azimuth angle zone (?), wherein the elevation angle zone (?1, ?2) also covers at least such a partial angle zone (?1) which lies within an angle interval of 15° to 90° above a horizontal (33) defined with respect to the motor vehicle (1).

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: The invention relates to a method for operating a radar system (100) especially of a motor vehicle (200), comprising at least one first sensor module (110a) and at least one additional sensor module (110b). A detection range (A) of the first sensor module (100a) at least partly overlaps a detection range (B) of the additional sensor module (110b) while the first sensor module (100a) receives a transmit signal transmitted by the additional sensor module (110b) in a monitoring mode (305) in order to obtain information about the operating condition of the additional sensor module (110b).

Abstract: The invention relates to a method for determining a distance (r) to a target object (200) consisting in transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said transmission signal (120a) reflected by a the target object (200) in the form of a reception signal (120c, 120d) by receiving device (111b) and evaluating the reception signal (120c, 120d) according a reference signal (1230b) which has a known phase difference with respect to the transmission signal (120a) and a frequency equal to the frequency thereof. The reference (120) and reception (120c, 120d) signal frequencies are reduced in a frequency divider (113) with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal (120b) and the reception (120c, 120d) signal in such a way that a reduced frequency reception signal (120b?) and a reduced frequency reception signal (120d) are obtained.

Abstract: The invention relates to an assistance system for motor vehicles (20), said system having a distance detection system (4) and a warning system (6), wherein provision is made of an evaluation unit (18) which combines items of information (12, 14, 16) obtained by the distance detection system (4) and by the warning system (6). The invention also relates to a method for operating an assistance system (2).

Abstract: An FMCW radar method is presented in which a radar system of a motor vehicle emits and receives radar waves, and in which a distance between an object and the motor vehicle is determined from a frequency shift between transmitted and received radar waves, and in which a speed of an object is determined from phase positions of received radar waves. The method is defined by the fact that in first time periods (T_A, T_B) it is carried out for objects in at least a first partial area (A, B) of the surroundings of the motor vehicle, and in second time period (T_C, T_D, T_E, T_F, T_G) distances, but not speeds, are determined for objects in at least a second partial area (C, D, E, F, G) of the surroundings.

Abstract: A wavelength tunable cavity includes a first reflecting unit adapted to at least partially reflect a beam of electromagnetic radiation towards a second reflecting unit, adapted to at least partially reflect a beam of electromagnetic radiation back towards said first reflecting unit, both reflecting units providing resonance modes of said electromagnetic radiation within said cavity, wherein an optical path of said beam within said cavity is defined in length by said first and second reflecting unit, a grating arranged within said optical path of said beam reflected by said first reflecting unit, said grating adapted for tuning the wavelength of said beam, wherein said at least one second reflecting unit is rotatable about an axis by at least 360 degrees along a circle path with respect to said grating, said circle path including at least a portion arranged to intersect with said beam, which is redirected by said grating.

Abstract: The invention relates to a method for operating a radar system (100) especially of a motor vehicle (200), comprising at least one first sensor module (110a) and at least one additional sensor module (110b). A detection range (A) of the first sensor module (100a) at least partly overlaps a detection range (B) of the additional sensor module (110b) while the first sensor module (100a) receives a transmit signal transmitted by the additional sensor module (110b) in a monitoring mode (305) in order to obtain information about the operating condition of the additional sensor module (110b).