TY - GEN
T1 - Ground moving target imaging based on 2-D velocity search in high resolution SAR
AU - Wang, Zhirui
AU - Xia, Xiang Gen
AU - Xu, Jia
AU - Huang, Zuzhen
AU - Zhang, Xudong
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/6/7
Y1 - 2017/6/7
N2 - A novel ground moving target imaging algorithm based on 2-D velocity search is proposed in high resolution synthetic aperture radar. In the range-Doppler domain, a range velocity with low accuracy is obtained via the response length along the range direction of the target's range migration. Then, an accurate range velocity is determined in the velocity search for the best range migration correction. As to the azimuth velocity, it is roughly acquired based on the road slope extracted from a SAR image. Next, an accurate azimuth velocity is searched to match the Doppler rate of the moving target in order to realize the azimuth focusing, which is measured by the contrast of target imaging result. After the 2-D velocity search, the range defocus and azimuth defocus of a moving target is eliminated, and the final focused imaging is fulfilled. Compared with some existing imaging approaches, the proposed algorithm solves the problem of Doppler spectrum split and has a relatively low computation burden. Finally, some numerical experiments are provided to demonstrate the effectiveness of the proposed algorithm.
AB - A novel ground moving target imaging algorithm based on 2-D velocity search is proposed in high resolution synthetic aperture radar. In the range-Doppler domain, a range velocity with low accuracy is obtained via the response length along the range direction of the target's range migration. Then, an accurate range velocity is determined in the velocity search for the best range migration correction. As to the azimuth velocity, it is roughly acquired based on the road slope extracted from a SAR image. Next, an accurate azimuth velocity is searched to match the Doppler rate of the moving target in order to realize the azimuth focusing, which is measured by the contrast of target imaging result. After the 2-D velocity search, the range defocus and azimuth defocus of a moving target is eliminated, and the final focused imaging is fulfilled. Compared with some existing imaging approaches, the proposed algorithm solves the problem of Doppler spectrum split and has a relatively low computation burden. Finally, some numerical experiments are provided to demonstrate the effectiveness of the proposed algorithm.
KW - Equivalent velocity
KW - Ground moving target imaging (GMTIm)
KW - Range length of range migration
KW - Range migration correction
KW - Synthetic aperture radar (SAR)
UR - http://www.scopus.com/inward/record.url?scp=85021412382&partnerID=8YFLogxK
U2 - 10.1109/RADAR.2017.7944173
DO - 10.1109/RADAR.2017.7944173
M3 - Conference contribution
AN - SCOPUS:85021412382
T3 - 2017 IEEE Radar Conference, RadarConf 2017
SP - 68
EP - 72
BT - 2017 IEEE Radar Conference, RadarConf 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Radar Conference, RadarConf 2017
Y2 - 8 May 2017 through 12 May 2017
ER -