Radar signal processing device and radar signal processing method
A radar signal processing device includes: a forming unit to form beams by using reception signals; a compensation unit to compensate for a phase within a range frequency; a generation unit to generate an image of each beam by applying Fourier transform in an azimuth direction to the beams (with phases compensated; an identification unit to identify a position of a target object based on the image; a calculation unit to calculate power of each beam represented by the image of each beam at a position of the target object; a computing unit to compute an antenna gain of each beam at a position of the target object; and an angle measurement unit to measure angle on the target object by performing maximum likelihood estimation of comparing the power of each beam with the antenna gain of each beam at the position of the target object.
1 . A radar signal processing device comprising:
processing circuitry:
to form a plurality of beams by using a plurality of reception signals;
to compensate for a phase within a range frequency for the formed plurality of beams;
to generate an image from each of the beams by applying Fourier transform in an azimuth direction to the plurality of beams whose phases have been compensated;
to identify a position of a target object on a basis of a sum of adding the generated images from the corresponding plurality of beams;
to calculate power of each of the beams represented by the image of each of the beams at the position of the target object;
to compute an antenna gain of each of the beams at the position of the target object;
to normalize the calculated power of each of the beams and to normalize the computed antenna gain of each of the beams; and
to perform angle measurement on the target object based on an azimuth angle corresponding to an angle in a horizontal direction and an elevation angle corresponding to an angle in a height direction, by performing maximum likelihood estimation of comparing the normalized calculated power of each of the beams with the normalized computed antenna gain of each of the beams at the position of the target object.
2 . The radar signal processing device according to claim 1 , the processing circuitry further including to form beams to obtain the plurality of reception signals.
3 . A radar signal processing method comprising:
forming a plurality of beams by using a plurality of reception signals;
compensating for a phase within a range frequency for the formed plurality of beams;
generating an image from each of the beams by applying Fourier transform in an azimuth direction to the plurality of beams whose phases have been compensated;
identifying a position of a target object on a basis of a sum of adding the generated images from the corresponding plurality of beams;
calculating power of each of the beams represented by the image of each of the beams at the position of the target object;
computing an antenna gain of each of the beams at the position of the target object;
normalizing the calculated power of each of the beams and normalizing the computed antenna gain of each of the beams; and
performing angle measurement on the target object based on an azimuth angle corresponding to an angle in a horizontal direction and an elevation angle corresponding to an angle in a height direction, by performing maximum likelihood estimation of comparing the normalized calculated power of each of the beams with the normalized computed antenna gain of each of the beams at the position of the target object.