A New Imaging Algorithm for Synthetic Aperture Radar Mosaic Mode

doi:10.3969/j.issn.1000-1093.2015.01.016

Abstract

Abstract: An imaging processing algorithm is proposed for the issues of squint imaging at the edge of imaging module and inconsistent pixel interval at different imaging blocks of mosaic mode. The signal azimuth spectrum aliasing in azimuth direction is eliminated effectively by using an improved de-ramping processing technology. On this basis, the range Doppler algorithm is used for range compression and range migration correction. Then the spectral algorithm based on CZT transform is used to eliminate the difference between the pixel intervals of sub-blocks. The simulation result shows that the proposed algorithm can be used for the imaging of mosaic mode.

Key words: radar engineering, synthetic aperture radar, mosaic mode, squint imaging, Chirp Z transform

CLC Number:

TN951

LI Cai-pin， HE Ming-yi. A New Imaging Algorithm for Synthetic Aperture Radar Mosaic Mode[J]. Acta Armamentarii, 2015, 36(1): 111-116.

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