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电子学报  2013 

基于EM算法的G0分布参数最大似然估计

DOI: 10.3969/j.issn.0372-2112.2013.01.031, PP. 178-184

Keywords: SAR图像,G0分布,EM算法,最大似然估计

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Abstract:

G0分布是目前合成孔径雷达(SyntheticApertureRadar,SAR)图像数据建模的一个重要模型,建模能力强、实用性好,受到了广泛的关注.G0分布的应用离不开准确有效的参数估计,而由于G0分布表达式复杂,统计意义上最优的最大似然估计法一直没能用在G0分布上.本文首先给出了一种新的方式来推导得出G0分布,在此基础上,采用最大期望(ExpectationMaximization,EM)算法为G0分布给出一种有效的最大似然参数估计方法.文中的方法与现有的G0分布参数估计方法通过实验进行了比较,实验结果充分证明了所提方法的有效性.

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