俯仰向DBF SAR系统通道相位偏差估计算法

doi:10.3969/j.issn.1001-2400.2018.01.026

Abstract

Abstract:

Due to the presence of phase bias between channels in elevation of the multichannel Synthetic Aperture Radar (SAR) system, the quality of the SAR images decreases after Digital Beam-Forming (DBF). In order to solve the problem, this paper presents a phase bias estimation algorithm for the multichannel SAR system in elevation. First, the complex interferograms are obtained by conjugate multiplication of the focused SAR images acquired by the adjacent channels. Then, the differential interferograms are obtained by conjugate multiplication of the adjacent interferograms. Finally, the phase bias between each channel and the reference one are estimated by the maximum sharpness optimization. The proposed algorithm is validated through experimental data acquired by the automobile based multichannel SAR system.

Key words: synthetic aperture radar, digital beam-forming, channel phase bias, maximum sharpness

WANG Zhibin;LIU Yanyang;LI Zhenfang;CHEN Junli. Channel phase bias estimation algorithm for the DBF SAR system in elevation[J].Journal of Xidian University, 2018, 45(1): 145-149+167.

References

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Channel phase bias estimation algorithm for the DBF SAR system in elevation

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