一种应用在多孔径宽测绘带SAR中的CS算法

An Algorithm Based on CS Algorithm Applied in Multi-aperture Wide-Swath SAR

多孔径接收宽测绘带SAR方法是一种较先进的高精度宽测绘带SAR成像方法。这种方法要求先对距离向信号压缩然后用反解矩阵求出各个测绘带的信号，然后再进行方位向聚焦。RD算法应用在这种成像方法比较方便，但是在星载SAR成像中大多用精度较高、运算量较小的CS算法。CS算法要求先进行方位向FFT而不是距离向压缩，所以不能直接应用在这种成像方法中。该文提出了一种基于CS算法的多孔径成像算法，可以很方便应用于多孔径接收宽测绘带SAR，并进行了计算量和误差分析，给出了仿真结果。仿真结果证实了本文所述方法的有效性。

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.