MIMO SAR OFDM chirp waveform design and GMTI with RPCA based method

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• 作者：Yan Huang ; ^{yellowstone0636@hotmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Guisheng Liao ^{liaogs@xidian.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jingwei Xu ^{xujingwei1987@163.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Dong Yang ^{yangdongxd@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Multiple-input multiple-output synthetic aperture radar (MIMO SAR) ; Ground moving target indication (GMTI) ; Robust principal component analysis (RPCA) ; Waveform design ; Orthogonal frequency division multiplexing (OFDM) chirp signal
• 刊名：Digital Signal Processing
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：51
• 期：Complete
• 页码：184-195
• 全文大小：2206 K

文摘

Multiple-input multiple-output synthetic aperture radar (MIMO SAR) has drawn wide attention for its increased degrees of freedom (DOFs) compared to the traditional multi-channel SAR (MC-SAR) system. The MIMO SAR system, which makes each antenna illuminate one subswath, can widen the range swath without decreasing PRF. One of the foremost tasks involved in the MIMO SAR system is the waveform design at the transmitter. Moreover, at the receiver, how to accurately separate the auto-correlation signal from the cross-correlation interferences is the other important issue. In this paper, an orthogonal frequency division multiplexing (OFDM) chirp signal designing method is firstly proposed, which is based on low cross-correlation interferences and good peak-to-sidelobe ratio (PSLR) rules. Using the designed OFDM chirp signals, the focused signal of MIMO SAR system matched the robust principal component analysis (RPCA) basic model. The moving target (sparse signal), clutter (low-rank signal) and noise (noise signal) can be separated directly. Hence, RPCA based method can be employed for ground moving target indication (GMTI) with no need for extracting the matched signal or suppressing the unmatched interferences. Extensive simulations demonstrate the effectiveness of the waveform designing method and GMTI with RPCA based method for MIMO SAR system.