TY - GEN
T1 - 3D Velocity Estimation for Moving Targets via Geosynchronous Bistatic SAR
AU - Wang, Pengfei
AU - Liu, Mei
AU - Wang, Shuwen
AU - Li, Yajun
AU - Tang, Kan
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/11/28
Y1 - 2018/11/28
N2 - Recently, geosynchronous synthetic aperture radar (GEO-SAR), which can achieve continuous Earth observation missions with large coverage and short revisit period, has drawn extensive attention. The wide-swath imaging mode of GEO-SAR presents great potentials for bistatic observation applications. Geosynchronous bistatic SAR (GEO-BiSAR) can not only complete large scene imaging task, but also provide the conditions for ground moving-target indication (GMTI). In this paper, the 3D velocity estimation for moving target via GEO-BiSAR are investigated. And the velocity estimation problem is extended to three-dimensional (3D) domain, considering that targets always move in a 3D space. To solve the 3D velocity of moving targets via GEO-BiSAR, the 3D velocity raw signal model is established, and a method based on fractional Fourier transform (FrFT) is proposed. First, the Doppler centroids and Doppler rates in the GEO-BiSAR are estimated by the FrFT. Second, one of the Doppler rates is used to estimate the azimuth velocity. Then, the range and height velocity are obtained by solving a Doppler centroid equation set. Finally, simulation experiments are presented to demonstrate the effectiveness of the method.
AB - Recently, geosynchronous synthetic aperture radar (GEO-SAR), which can achieve continuous Earth observation missions with large coverage and short revisit period, has drawn extensive attention. The wide-swath imaging mode of GEO-SAR presents great potentials for bistatic observation applications. Geosynchronous bistatic SAR (GEO-BiSAR) can not only complete large scene imaging task, but also provide the conditions for ground moving-target indication (GMTI). In this paper, the 3D velocity estimation for moving target via GEO-BiSAR are investigated. And the velocity estimation problem is extended to three-dimensional (3D) domain, considering that targets always move in a 3D space. To solve the 3D velocity of moving targets via GEO-BiSAR, the 3D velocity raw signal model is established, and a method based on fractional Fourier transform (FrFT) is proposed. First, the Doppler centroids and Doppler rates in the GEO-BiSAR are estimated by the FrFT. Second, one of the Doppler rates is used to estimate the azimuth velocity. Then, the range and height velocity are obtained by solving a Doppler centroid equation set. Finally, simulation experiments are presented to demonstrate the effectiveness of the method.
KW - 3D Velocity Estimation
KW - GMTI
KW - Geosynchronous bistatic SAR
KW - fractional Fourier transform
UR - https://www.scopus.com/pages/publications/85060037173
U2 - 10.1109/SARS.2018.8552030
DO - 10.1109/SARS.2018.8552030
M3 - 会议稿件
AN - SCOPUS:85060037173
T3 - 2018 China International SAR Symposium, CISS 2018 - Proceedings
BT - 2018 China International SAR Symposium, CISS 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 China International SAR Symposium, CISS 2018
Y2 - 10 October 2018 through 12 October 2018
ER -