一种相干系数加权的最优干涉相位滤波

doi:10.3969/j.issn.1001-2400.2014.02.005

Abstract

Abstract:

A coherence-weighted optimum interferometric phase filtering method is presented. It is proved that the optimum weight is the variance reciprocal of the phase noise in the sense of minimum post-filter phase noise variance, and the approach to obtaining the optimum weight through coherence estimation is exhibited. Moreover, in estimating the coherence, the synthetic interferogram of the scene which is proportional to the range difference between targets and radars is computed and compensated with reference DEM firstly, then a group of directional windows is utilized to select the samples adaptively according to the Minimum-Mean-Phase-Difference rule, and simulation experiment has established the reasonable choice of the directional windows' parameters. Finally, the processing results of the real data show that our method can suppress the phase noise and reduce the number of residues dramatically.

Key words: interferometric synthetic aperture radar, interferometric phase filtering, coherence, synthetic interferogram

CLC Number:

TN957

LI Jinwei;LI Zhenfang;LIU Yanyang;BAO Zheng. Coherence-weighted optimum interferometric phase filtering method[J].J4, 2014, 41(2): 25-31.

References

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Coherence-weighted optimum interferometric phase filtering method

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