一种杂波分类辅助的近海岸模糊杂波抑制方法

doi:10.19665/j.issn1001-2400.2021.02.009

Abstract

Abstract:

To address the problem that the clutter suppression performance is reduced for the multichannel synthetic aperture radar(SAR) because of the ambiguous component of the land clutter in the inshore area,we propose an inshore ambiguity clutter suppression method aided by on clutter classification.First,a multi-look interference feature covariance matrix(MIFCM) for each range-Doppler unit is constructed,which includes multi-look interference magnitude/phase and multi-look interference magnitude gradient information.Next,with the affine invariant riemannian(AIR) distance measure of MIFCMs,the clutter classification result can be acquired.Finally,with the clutter classification result,we select independent and identically distributed(IID) training samples to estimate the clutter covariance matrix in the ambiguous clutter region,with clutter suppression performed in the multichannel SAR image domain.Simulation result shows that the proposed method can accurately classify and suppress the azimuth ambiguous clutter in the inshore area.

Key words: synthetic aperture radar, clutter suppression, clutter classification, affine invariant riemannian distance, inshore area, azimuth ambiguous

CLC Number:

TN958

DUAN Chongdi,HAN Chaolei,YANG Zhiwei,ZHANG Qingjun. Inshore ambiguity clutter suppression method aided by clutter classification[J].Journal of Xidian University, 2021, 48(2): 64-71.

Figures/Tables 9

References 14

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参数	值
雷达波长/m	0.031 1
通道数	2
基线长度/m	5.0
卫星平台速度/(km·s^-1)	7.500
脉冲重复频率/Hz	1 200

杂波类型	AM&SF方法	IMSR方法	文中方法
海杂波	40.2	99.9	100.0
模糊杂波	85.7	90.0	99.1
陆地杂波	81.5	98.5	99.0

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Inshore ambiguity clutter suppression method aided by clutter classification

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