收稿日期: 2010-07-13
修回日期: 2010-10-15
网络出版日期: 2011-07-15
Modified RMA based on range sub-blocks in range-Doppler domain
Received date: 2010-07-13
Revised date: 2010-10-15
Online published: 2011-07-15
徐海胜 , 宋红军 , 华斌 , 袁志辉 . 基于RD域分块的改进距离徙动成像算法[J]. 中国科学院大学学报, 2011 , 28(4) : 498 -504 . DOI: 10.7523/j.issn.2095-6134.2011.4.011
On the basis of our study on SAR imaging algorithm in 2D frequency domain, we propose a modified range migration algorithm (RMA) using range sub-blocks in range-Doppler domain (RDB-RMA), and make a comparison between our proposed algorithm and other two algorithms, approximate RMA and scaled inverse Fourier transformation algorithm (SIFTA). The simulation data show that RDB-RMA is better in focusing capabilitity than the other two algorithms, when the swath is very wide and the range migration is very large. By comparing these algorithms, we conclude that RDB-RMA is better in computing efficiency than SIFTA. Finally, an experiment carried out on measured data confirms feasibility of the proposed algorithm.
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