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基于Cramer-Rao界的密集目标统计分辨限

Keywords: 统计分辨限,Cramer-Rao界,Smith准则,密集目标

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Abstract:

基于Cramer-Rao界,对Smith10给出的密集信号统计分辨限(statisticalresolutionlimit,SRL)进行了进一步研究,给出了一般结果.推导得出了两个点目标空间频率差Cramer-Rao界(CRB)的闭式表达式,并针对目标密集分布情况对此CRB进行了渐进分析,进一步由Smith准则确定了雷达系统密集目标分辨限的一般形式.SRL是目标功率比、目标回波初相差和信噪比(Rsn)的函数.探讨了不同功率比和初相差条件下SRL与两个目标Rsn的关系.极大似然估计(MLE)仿真结果表明,在可分辨区内MLE的实验性能达到了CRB;在本文预测的分辨限处MLE的性能开始偏离CRB曲线.仿真结果验证了本文给出的统计分辨限是准确、合理的.

References

[1]  Wengrovitz M S, Lee H B. Resolution threshold of beamspace MUSIC for two closely spaced emitters[J]. IEEE Transaction on Acoust, Speech, Signal Process, 1990, 38:1545-1551.
[2]  Stocia P, Soderstrom T. Statistical analysis of MUSIC and subspace rotation estimates of sinusoidal frequencies[J]. IEEE Transaction on Signal Process, 1991, 39:1836-1845.
[3]  Lee H B. The Cramer-Rao bound on frequency estimates of signals closely spaced in frequency[J]. IEEE Transaction on Signal Process, 1992, 40:1508-1517.
[4]  Swingler D N. Approximate expressions for the Cramer-Rao lower bounds on parameter estimates for a pair of closely spaced cisoids[J]. Signal Process, 2000, 76:99-104.
[5]  Smith S T. Accuracy and resolution bounds for adaptive sensor array processing[C]//Proc of 9th IEEE Signal Process Workshop Statist Signal Array Process. Portland, USA:[s.n.], 1998:37-42.
[6]  Smith S T. Statistical resolution limits and the complexified Cramer-Rao bound[J]. IEEE Transaction on Signal Process, 2005, 53:1597-1610.
[7]  El Korso M N, Boyer Remy, Renaux Alexandre, et al. Statistical resolution limit for multiple parameters of interest and for multiple signals[C]//Proceedings of IEEE International Conference on Accoustics, Speech and Signal Processing. Dallas, USA:[s.n.], 2010:3602-3605.
[8]  El Korso M N, Boyer Remy, Renaux Alexandre, et al. Satistical resolution limit for source localization in a MIMO contex[C]//Proceedings of IEEE International Conference on Accoustics, Speech and Signal Processing. Prague Congress Ctr:[s.n.], 2011:2756-2759.
[9]  M.K.斯蒂芬.统计信号处理基础[M].罗鹏飞, 等译.北京:电子工业出版社, 2006. Steven M K. Fundamentals of statistical signal processing[M]. Luo Pengfei et al, transl. Beijing: Publishing House of Electronics Industry, 2006. (in Chinese)

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