Rice杂波中Swerling Ⅱ目标的似然比检测
LIKELIHOOD RATIO DETECTION OF SWERLING Ⅱ TARGETS IN RICIAN CLUTTER
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摘要: 正 1.引言 描述地杂波统计特性时常用Rice模型,其物理基础是认为地杂波由固定反射体引起的稳定分量和大量运动散射体引起的瑞利起伏分量所合成。Fogel曾导出稳定分量不相干时Rice杂波中离散时间最佳检测的估值器-相关器结构,但仍得不到显式解,实现有困难,他转而研究了一种次最佳检测器
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Abstract: The discrete time detection of Swerling Ⅱtargets in Rician clutter is investigated. The likelihood ratio (LR) detector struetures when the clutter steady component is coherent and noncoherent are developed respeetively. The efficacy expressions for the detectors are derived. The calculation results show that the more the clutter statistics depart from the Gaussian situation, the better is the detection performance of LR detectors than that of square law detector. The ARE in case of clutter steady component being coherent can be more than twofold higher than that in case of clutter steady component being noncoherent. -
M.W.Long, Radar Reflectivity of Land and Sea, Artech House, Dedham, Mass., 1983.[2]A. Fogel, IEEE Trans. on IT, IT-29(1983), 761.[3]A. D. Whalen, Detection of Signals in Noice, Academic Press, New York, 1971.[4]J. S. Bird, Ground Clutter Suppression Using a Coherent Clutter Map, Radar-82, IEE Conference Publication Number 216, 18-20 October 1982, pp 491-495.[5]M. I. Skolnik, Introduction to Radar Systems, McGraw-Hill, New York, 1980.[6]H. Cramer, Mathematical Methods of Statistics, Princeton Univ. Press, Princeton, New Jersey,1958. -
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