順軌雙天線機(jī)載InSAR的地面運(yùn)動(dòng)目標(biāo)檢測研究
Ground Moving Target Indication Based on Along Track Airborne InSAR with Two Antennas
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摘要: 基于高分辨率順軌雙天線機(jī)載InSAR，研究了地面運(yùn)動(dòng)目標(biāo)檢測問題。采用雙通道干涉處理，抑制地面靜止雜波。針對高分辨率InSAR合成孔徑時(shí)間較長的特點(diǎn)，將運(yùn)動(dòng)目標(biāo)成像處理的概念引入運(yùn)動(dòng)目標(biāo)檢測過程，對運(yùn)動(dòng)目標(biāo)信號實(shí)施距離徙動(dòng)校正后，再聚焦成像，從而改善檢測信噪比和信雜比，并進(jìn)一步提高測速精度。InSAR仿真數(shù)據(jù)的處理結(jié)果表明了該方法的有效性。Abstract: The Ground Moving Target Indication(GMTI) is investigated based on along track high resolution airborne InSAR with two antennas. The two antenna interferometric processing is used to suppress ground clutter. The concept of moving target imaging is introduced for GMTI of high resolution InSAR with longer synthetic aperture time. The range migration correction and refocus processing for moving target signals are implemented to improve the signal-noise rate and signal-clutter rate for their detection and velocity measurement. The processing results of simulated InSAR data show the effectiveness of the new method.
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