TY - GEN
T1 - A fast doppler parameters estimation method for moving target imaging based on 2D-FFT
AU - Lan, Yi
AU - Li, Zhongyu
AU - Qu, Jingyi
AU - Wu, Junjie
AU - Yang, Jianyu
N1 - Publisher Copyright:
© 2018 IEEE
PY - 2018/10/31
Y1 - 2018/10/31
N2 - Moving targets are usually defocused in synthetic aperture radar (SAR) images due to across range unit (ARU) range migration and Doppler migration caused by unknown motion parameters. To eliminate the influence of these issues on moving target imaging, a novel Doppler parameters estimation method for moving targets is proposed. First, second-order keystone transform (SOKT) is applied to remove range curvature. Then, a deramp function is proposed to reduce the order of coupling and remove the residual first-order coupling. In the following, Doppler parameters can be obtained through range IFFT and azimuth FFT. The proposed method is capable of accumulating the energy of ARU target's trajectory into a peak and obtaining Doppler parameters in range-Doppler domain with low computational complexity. Furthermore, it has better antinoise performance comparing with the Hough transform and Radon transform. The effectiveness of the proposed method is validated by simulated data for ground moving targets.
AB - Moving targets are usually defocused in synthetic aperture radar (SAR) images due to across range unit (ARU) range migration and Doppler migration caused by unknown motion parameters. To eliminate the influence of these issues on moving target imaging, a novel Doppler parameters estimation method for moving targets is proposed. First, second-order keystone transform (SOKT) is applied to remove range curvature. Then, a deramp function is proposed to reduce the order of coupling and remove the residual first-order coupling. In the following, Doppler parameters can be obtained through range IFFT and azimuth FFT. The proposed method is capable of accumulating the energy of ARU target's trajectory into a peak and obtaining Doppler parameters in range-Doppler domain with low computational complexity. Furthermore, it has better antinoise performance comparing with the Hough transform and Radon transform. The effectiveness of the proposed method is validated by simulated data for ground moving targets.
KW - Deramp function
KW - Doppler frequency rate
KW - Second-order keystone transform (SOKT)
KW - Synthetic aperture radar (SAR)
UR - https://www.scopus.com/pages/publications/85063124282
U2 - 10.1109/IGARSS.2018.8517704
DO - 10.1109/IGARSS.2018.8517704
M3 - 会议稿件
AN - SCOPUS:85063124282
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 589
EP - 592
BT - 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
Y2 - 22 July 2018 through 27 July 2018
ER -