双通道两视干涉相位差解径向速度模糊方法

doi:10.3969/j.issn.1001-2400.2014.03.003

Abstract

Abstract:

Based on dual-channel two-look interferometric phase difference, a new method is proposed to estimate the radial velocity of a moving target unambiguously in the synthetic aperture radar/ground moving target indication (SAR/GMTI) system. The two-look data is constructed in the range frequency domain, and interferometric phases of two-look are obtained by interferometry between the data of different channels. Since the interferometric phase difference of the two-look is not wrapped, the proposed method can be used to estimate the radial velocity of a moving target unambiguously. And the maximum unambiguous radial velocity is effectively improved by the proposed method. The effect on radial velocity estimation by the interval of the two-look data in range frequency is focused. Numerical and real data are processed to demonstrate the effectiveness of the proposed method.

Key words: ground moving targets indication, synthetic aperture radar, unambiguous radial velocity estimation, dual-channel two-look interferometric phase difference

ZHANG Xuepan;LIAO Guisheng;ZHU Shengqi;YANG Dong;GAO Yongchan. Solution to radial velocity ambiguity by dual-channel two-look interferometric phase difference[J].J4, 2014, 41(3): 14-19+87.

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Solution to radial velocity ambiguity by dual-channel two-look interferometric phase difference

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