Multichannel sliding spotlight SAR imaging based on l1 regularization [基于l1正则化的多通道滑动聚束SAR成像]

作者：Xu Z.; Wei Z.; Wu C.; Zhang B.

来源：Systems Engineering and Electronics, 2019, 41(2): 304-310.

DOI：10.3969/j.issn.1001-506X.2019.02.12

• Displaced phase center antenna (DPCA)
• L1 regularization
• Multi-channel
• Sliding spotlight synthetic aperture radar (SAR)

l1 regularization based multi-channel sliding spotlight synthetic aperture radar (SAR) imaging method is proposed. The proposed method combines the displaced phase center antenna (DPCA) technology with the l1 regularization scheme to solve the azimuth ambiguities problem caused by nonuniform sampling, and introduces azimuth-range decouple algorithm to reduce the computational complexity. In the case of more serious non-uniform sampling compared with the matched filter bank algorithm based on Doppler spectrum reconstruction, the proposed method can suppress azimuth ambiguities more effectively and shows potential in achieving wider range swath. In addition, the method can suppress the noise and sidelobe and improve the target to background ratio, which means the imaging performance is improved. The effectiveness of the proposed method is verified by simulation and actual data experiments.

• 单位
  中国科学院大学