基于级数反演法的聚束式广义双基成像算法研究
doi: 10.3724/SP.J.1146.2009.00502
General Spotlight Bistatic SAR Imaging Based on Series Reversion
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摘要: 该文将级数反演法应用于聚束式广义双基成像。对于广义双基，其2维频谱表达式较普通双基更加复杂，很难用精确的解析关系表达，这对后续成像处理造成了极大的困难。通过级数反演法，可以得到信号的2维频谱展开式，在2维频域进行2次距离压缩，同时在距离多普勒域进行距离徙动校正。该算法保留了单基距离多普勒算法的高效性，由于2次距离压缩考虑到了方位向的影响，因此该算法对大合成孔径情况比较适合。用该算法对仿真数据进行处理，得到了良好的成像结果。Abstract: This paper deals with the general spotlight bistatic SAR data based on series reversion. It is rather difficult to obtain the two-dimensional frequency spectrum which is hard for latter processing. By using the series reversion, the two-dimensional point target spectrum can be easily got, secondary range compression can be finished in the 2-D frequency domain and the range cell migration can be corrected in the range-Doppler domain. This algorithm has the advantage of range Doppler algorithm and it is suitable for large synthetic aperture. The accuracy of the proposed approach is verified with a simulation.
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