| Citation: | Yuying WANG, Zhimin ZHANG, Ning LI, Huaitao FAN, Qingchao ZHAO. A Moving Target Imaging Approach for the Multichannel in Azimuth High Resolution Wide Swath SAR System[J]. Journal of Electronics & Information Technology, 2020, 42(3): 541-546. doi: 10.11999/JEIT190211
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Since the echo characteristics of moving targets are different from that of stationary targets, the traditional reconstruction filter bank algorithm, i.e., the reconstruction filter algorithm, is not applicable. In this paper, a novel reconstruction approach of the moving target for a multichannel in azimuth High-Resolution Wide-Swath (HRWS) Synthetic Aperture Radar (SAR) system is proposed. The approach firstly analyzes the echo characteristics of the moving target for the multi-channel in azimuth SAR system and gives the main reason for the failure of the traditional reconstruction method in contrast to the form of the stationary target echo. By introducing the radial velocity of the moving target, the spectrum reconstruction of the uniform moving target is effectively realized, and the azimuth ambiguities of the uniform moving target for the multi-channel in azimuth SAR system is well suppressed. Space-borne simulated results confirm the effectiveness of the proposed reconstruction approach.
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