Sum-difference Reduced-dimensional Processing in SAR Image Domain and Statistical Analysis for Ground Moving Target Indication

• Published in: Chinese journal of aeronautics Vol. 22; no. 6; pp. 620 - 626
• Main Authors: Zhiwei, Yang, Guisheng, Liao, Juan, Zhang, Cao, Zeng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2009
• Subjects: clutter rejection; ground moving target indication; multi-channel; SAR图像; space-time adaptive processing; synthetic aperture radar; 合成孔径雷达; 图像域; 地面运动目标指示; 杂波抑制; 统计分析; 自适应处理; 降维处理; ground moving target indication; clutter rejection; multi-channel; synthetic aperture radar; space-time adaptive processing
• ISSN: 1000-9361; 2588-9230
• DOI: 10.1016/S1000-9361(08)60150-8

In this article, a new reduced-dimensional adaptive processing algorithm based on joint pixels sum-difference data for clutter rejection is proposed. The sum-difference data are obtained by orthogonal projection of the joint pixels data of different synthetic aperture radar （SAR） images generated by a multi-satellite radar system. In the sense of statistical expectation, the sum-difference data contain the common and different information of the SAR images. Therefore, the objective of clutter cancellation can be achieved by adaptive processing. Moreover, based on the residual image after clutter rejection, statistical analysis of constant false-alarm rate （CFAR） detection of moving targets is also presented. Simulation results demonstrate the effectiveness and robustness of the proposed algorithm even with heterogeneous clutter and image co-registration error.