基于GPS信号的双基SAR数值距离徙动成像算法

甄杰; 张振华; 吴顺君

doi:10.3724/SP.J.1146.2008.01557

基于GPS信号的双基SAR数值距离徙动成像算法

doi: 10.3724/SP.J.1146.2008.01557

基金项目:

国家自然科学基金(40871166)和中国博士后科学基金(20070411120)资助课题

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出版历程
- 收稿日期: 2008-11-26
- 修回日期: 2009-06-08
- 刊出日期: 2009-09-19

GPS Signal Based Numeric Range Migration Algorithm of Bistatic SAR

摘要

摘要: 非对称星-机双基SAR成像算法研究是双基SAR研究的难点问题之一。该文针对以GPS卫星为照射源的连续波星-机双基SAR，提出一种基于数值计算的快速双基距离徙动成像算法(RMA)。此方法利用瞬时多普勒频率法得到系统回波信号精确的2维频域解析式，并用数值方法得到RMA算法所用的匹配函数和插值函数。此算法既有RMA算法速度快，精度高的特点，又有后向投影(BP)算法适用范围广的特点。
- 全球定位系统;双基合成孔径雷达;距离徙动成像算法
Abstract: Research of asymmetric spaceborne-airborne bistatic SAR imaging algorithm is one of difficult issues in field of bistatic SAR. In this paper, a fast numerical Range Migration Algorithm (RMA) is proposed for GPS signal based continuous wave spaceborne-airborne bistatic SAR. A two dimentional precise analytic expression in frequency domain of system response signal is deduced by using approach of instantaneous Doppler wavenumber, and the match function and interpolation function of the proposed algorithm can be obtained numerically. The proposed algorithm has the characteristics of fast speed and high precision of RMA. In addition, it also has the same wide application range compared with Back Projection (BP) algorithm.

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参考文献(1)

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