Alpha稳定分布噪声环境下改进MCC时延估计算法
首发时间:2010-11-12
摘要:在alpha稳定分布噪声环境下,由于最大相关熵(MCC)准则与最小分散系数(MD)准则具有等价性,使得以相关熵作为代价函数的MCC自适应时延估计算法成为解决时延问题的一个新的思路。MCC算法与以MD准则为基础的传统时延算法相比较,不需要噪声的先验知识,但是其综合的性能并没有很大的提升。本文提出两种MCC的改进算法:归一化MCC(NMCC)自适应时延算法和二次迭代MCC(TMCC)时延估计算法。通过理论分析和计算机仿真结果表明,这两种算法有较好的收敛性和较小的稳态失调,并且具有较高的抑制稳定分布噪声能力。
关键词: 时延估计 alpha稳定分布 相关熵 归一化相关熵法 二次迭代相关熵法
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Improved MCC TDE methods under alpha-stable distribution noise environment
Abstract:Because the equivalence between minimum dispersion coefficient criterion (MD) and maximum correntropy criterion (MCC) has been proven, MCC could be used as a new way to solve the TDE issue under alpha-stable distribution noise background. Even thougth the MCC-TDE algorithm does not need any prior information about the noise, it fails to present much improvement than the algorithms based on MD. In this paper, two improved MCC-TDE algorithms have been proposed. It is demonstrated by computer simulations that the new proposed algorithms are robust under various noise conditions and presents a very good performance.
Keywords: TDE alpha-stable distribution conrrentropy NMCC-TDE TMCC-TDE
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No.4390307549960128****
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