Modified RMA based on range sub-blocks in range-Doppler domain

doi:10.7523/j.issn.2095-6134.2011.4.011

Abstract

Abstract:

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.

Key words: synthetic aperture radar (SAR), range Doppler (RD), range migration, block, imaging algorithm

CLC Number:

TN957

XU Hai-Sheng, SONG Hong-Jun, HUA Bin, YUAN Zhi-Hui. Modified RMA based on range sub-blocks in range-Doppler domain[J]. , 2011, 28(4): 498-504.

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