TY - GEN
T1 - Along-track velocity estimation for SAR moving target in complex image domain
AU - Huang, Zu Zhen
AU - Xu, Jia
AU - Wang, Zhi Rui
AU - Xia, Xiang Gen
AU - Long, Teng
AU - Bian, Ming Ming
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2017/10/4
Y1 - 2017/10/4
N2 - A new along-track velocity estimation method is proposed for synthetic aperture radar (SAR) ground moving target in the complex image domain. For a target with relatively large along-track velocity, its complex response is a linear frequency-modulated (LFM) signal in the image domain. Its Doppler rate is mainly determined by the along-track velocity, while the effect of the cross-track velocity can be ignored. In this paper, the along-track velocity of a detected target in the image domain can be estimated based on the Doppler rate retrieval via fractional Fourier transform. The proposed method can be well combined with the SAR-GMTI algorithms in image domain, where the signal to clutter-plus-noise ratio is higher than other domains. Finally, some results of numerical experiments are provided to demonstrate the effectiveness of the proposed method.
AB - A new along-track velocity estimation method is proposed for synthetic aperture radar (SAR) ground moving target in the complex image domain. For a target with relatively large along-track velocity, its complex response is a linear frequency-modulated (LFM) signal in the image domain. Its Doppler rate is mainly determined by the along-track velocity, while the effect of the cross-track velocity can be ignored. In this paper, the along-track velocity of a detected target in the image domain can be estimated based on the Doppler rate retrieval via fractional Fourier transform. The proposed method can be well combined with the SAR-GMTI algorithms in image domain, where the signal to clutter-plus-noise ratio is higher than other domains. Finally, some results of numerical experiments are provided to demonstrate the effectiveness of the proposed method.
KW - Along-track velocity
KW - Fractional Fourier transform (FrFT)
KW - Ground moving target indication (GMTI)
KW - Synthetic aperture radar (SAR)
UR - https://www.scopus.com/pages/publications/85034664908
U2 - 10.1109/RADAR.2016.8059497
DO - 10.1109/RADAR.2016.8059497
M3 - Conference contribution
AN - SCOPUS:85034664908
T3 - 2016 CIE International Conference on Radar, RADAR 2016
BT - 2016 CIE International Conference on Radar, RADAR 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 CIE International Conference on Radar, RADAR 2016
Y2 - 10 October 2016 through 13 October 2016
ER -