一種應(yīng)用在多孔徑寬測繪帶SAR中的CS算法
An Algorithm Based on CS Algorithm Applied in Multi-aperture Wide-Swath SAR
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摘要: 多孔徑接收寬測繪帶SAR方法是一種較先進(jìn)的高精度寬測繪帶SAR成像方法。這種方法要求先對(duì)距離向信號(hào)壓縮然后用反解矩陣求出各個(gè)測繪帶的信號(hào)，然后再進(jìn)行方位向聚焦。RD算法應(yīng)用在這種成像方法比較方便，但是在星載SAR成像中大多用精度較高、運(yùn)算量較小的CS算法。CS算法要求先進(jìn)行方位向FFT而不是距離向壓縮，所以不能直接應(yīng)用在這種成像方法中。該文提出了一種基于CS算法的多孔徑成像算法，可以很方便應(yīng)用于多孔徑接收寬測繪帶SAR，并進(jìn)行了計(jì)算量和誤差分析，給出了仿真結(jié)果。仿真結(jié)果證實(shí)了本文所述方法的有效性。
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關(guān)鍵詞:
- SAR;寬測繪帶;CS算法;多孔徑成像算法
Abstract: The wide-swath method based on multi-receiver is a novel and highly accuracy wide-swath method. This method needs focus in range signal at first, so RD (Range-Doppler) arithmetic can apply to the method easily while CS (Chirp Scaling) arithmetic has some difficulties. An algorithm based on CS algorithm is proposed in this paper that can be applied in the multi-aperture wide-swath SAR method. The error and operand of this algorithm is analyzed. Finally the simulation result is present, it turn out to validate the algorithm. -
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