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。
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.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第4期932-936,共5页
Journal of Electronics & Information Technology
关键词
广义双基SAR
级数反演法
聚束式
二次距离压缩
距离徙动校正
General bistatic SAR
Series reversion
Spotlight
Secondary range compression
Range cell migration correcting
