Abstract: A vehicle radar system (3) including a control unit arrangement (8) and at least one radar sensor arrangement (4) arranged to transmit signals (6) and receive reflected signals (7). The vehicle radar system (3) acquires a plurality of measured radar detections (10, 11, 12, 13) at different times. The control unit arrangement (8) engages a tracking algorithm using the present measured radar detections (10, 11, 12, 13) as input such that at least one track is initialized. For each track, the control unit arrangement (8) calculates a calculated previous radar detection (14) that precedes the present measured radar detections (10, 11, 12, 13), and to re-initialize the tracking algorithm using the present measured radar detections (10, 11, 12, 13) in combination with the calculated previous radar detection (14).

Abstract: A method for detecting blockage of a radar sensor (105) by processing a radar signal (115, 116, 117) received by the radar sensor (105). The method includes obtaining (S1) the radar signal (115, 116, 117), determining (S2) a range-Doppler representation (300) of the radar signal such that received radar signal energy (311) is represented as a function of distance (d0-d13) and relative velocity (v0-v7), determining (S4) predetermined azimuth angles (?1, ?2, ?3) for the radar sensor (105) and calculating (S31) a relative velocity (v0, v3, v5) for each predetermined azimuth angle (?1, ?2, ?3).

Abstract: A vehicle radar system (3) including a control unit arrangement (8) and at least one radar sensor arrangement (4) arranged to acquire a plurality of measured radar detections (zt, zt+1) at different times. The control unit arrangement (8) engages a tracking algorithm using the present measured radar detections (zt, zt+1) as input. For each track, for each one of a plurality of measured radar detections (zt, zt+1), the control unit arrangement (8) calculates a corresponding predicted detection (xt|t?1|, xt+1|t|) and a corrected predicted detection (xt|t|, xt+1|t+1|), and calculates an innovation vector (19, 19) constituted by a first vector type (18a, ??) and a second vector type (18b, ?r). The control unit arrangement (8) calculates a statistical distribution (24; ?inno,?, ?inno,r) for at least one of the vector types (18a, ??; 18b, ?r) and to determine how it is related to another statistical distribution (25; ?meas,?, ?meas,r); and/or to determine its symmetrical characteristics.

Abstract: A vehicle FMCW Doppler radar system (3) and related method using transmitter arrangement (4), a receiver arrangement (7) and at least one control unit (15). The radar system (3) is arranged to transmit signals (11), to receive reflected signals (12), and to obtain a plurality of measure results from the received reflected signals (12) along a main field of view (10) during at least two radar cycles where each radar cycle including a plurality of FMCW ramps. For each radar cycle, the control unit (15) is arranged to form a spectrum density map (30) from measuring points (14) along the main field of view (10), where each measure result results in a measuring point (14). The control unit (15) is arranged to combine at least two spectrum density maps to form a combined spectrum density map.

Abstract: A vehicle radar system (3) including a control unit arrangement (8) and at least one radar sensor arrangement (4) arranged to acquire a plurality of measured radar detections (zt, zt+1) at different times. The control unit arrangement (8) engages a tracking algorithm using the present measured radar detections (zt, zt+1) as input. For each track, for each one of a plurality of measured radar detections (zt, zt+1), the control unit arrangement (8) calculates a corresponding predicted detection (xt|t?1|, xt+1|t|) and a corrected predicted detection (xt|t|, xt+1|t+1|), and calculates an innovation vector (19, 19) constituted by a first vector type (18a, ??) and a second vector type (18b, ?r). The control unit arrangement (8) calculates a statistical distribution (24; ?inno,?, ?inno,r) for at least one of the vector types (18a, ??; 18b, ?r) and to determine how it is related to another statistical distribution (25; ?meas,?, ?meas,r); and/or to determine its symmetrical characteristics.

Abstract: A vehicle radar system (2) having a radar detector (3) arranged to detect at least one stationary object (10) a plurality of times when a vehicle (1) moves in relation to it. A plurality of detected positions (11, 12, 13) are obtained in a local coordinate system (15), fixed with respect to the radar detector (3). The object (10) is stationary with respect to a global coordinate system (16), fixed with respect to the environment. A position detector (14) is arranged to detect its present movement conditions with reference to the global coordinate system (16). Correction factors are applied on each detected position of the object in the local coordinate system (15). Obtained corrected detected positions are then transformed into the global coordinate system (16) and an error/cost value is calculated for each correction factor. The correction factor that results in the smallest error/cost value is chosen.

Abstract: A vehicle radar system (3) including a control unit arrangement (8) and at least one radar sensor arrangement (4) arranged to transmit signals (6) and receive reflected signals (7). The vehicle radar system (3) acquires a plurality of measured radar detections (10, 11, 12, 13) at different times. The control unit arrangement (8) engages a tracking algorithm using the present measured radar detections (10, 11, 12, 13) as input such that at least one track is initialized. For each track, the control unit arrangement (8) calculates a calculated previous radar detection (14) that precedes the present measured radar detections (10, 11, 12, 13), and to re-initialize the tracking algorithm using the present measured radar detections (10, 11, 12, 13) in combination with the calculated previous radar detection (14).

Abstract: A vehicle radar system (2) having a radar detector (3) arranged to detect at least one stationary object (10) a plurality of times when a vehicle (1) moves in relation to it. A plurality of detected positions (11, 12, 13) are obtained in a local coordinate system (15), fixed with respect to the radar detector (3). The object (10) is stationary with respect to a global coordinate system (16), fixed with respect to the environment. A position detector (14) is arranged to detect its present movement conditions with reference to the global coordinate system (16). Correction factors are applied on each detected position of the object in the local coordinate system (15). Obtained corrected detected positions are then transformed into the global coordinate system (16) and an error/cost value is calculated for each correction factor. The correction factor that results in the smallest error/cost value is chosen.

Abstract: A vehicle FMCW Doppler radar system (3) and related method using transmitter arrangement (4), a receiver arrangement (7) and at least one control unit (15). The radar system (3) is arranged to transmit signals (11), to receive reflected signals (12), and to obtain a plurality of measure results from the received reflected signals (12) along a main field of view (10) during at least two radar cycles where each radar cycle including a plurality of FMCW ramps. For each radar cycle, the control unit (15) is arranged to form a spectrum density map (30) from measuring points (14) along the main field of view (10), where each measure result results in a measuring point (14). The control unit (15) is arranged to combine at least two spectrum density maps to form a combined spectrum density map.