双通道沿迹干涉SAR地面动目标检测
Dual Channels Along -Track Interferometry SAR Ground Moving Target Detection
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摘要: 该文深入研究了双通道沿迹干涉(Along-Track Interferometry, ATI )SAR的机理，给出了运用该机理在静止目标去线性调频后的频域内进行动目标检测的方法。文中详细描述了该方法的检测过程，分析了杂波、噪声以及目标速度对检测性能的影响, 最后给出了计算机仿真结果。分析及仿真结果表明， 与同常规方法相比，该方法对可检测运动目标信杂比的要求降低，对于淹没在主瓣杂波谱内的动目标以及在主瓣杂波谱外的动目标能够同时检测；同时，在频域检测计算量下降。Abstract: This paper provides a ground moving target detection algorithm in Range-Doppler domain with Along-Track Interferometry(ATI) for dual channels SAR after studying ATI theory deeply. It describes the procedure of detection in detail and analyzes the effect of Signal-Noise-Ratio(SNR), Signal-Clutter-Ratio(SCR) and moving targets velocity. Finally, some typical computer simulation results are presented. Comparing with routine method, the method in the paper requires lower SCR of moving target, and can detects targets both in and out of the clutter main lobe frequency. In addition, it neednt compress echoes in azimuth, so the computation decreases.
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