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论文类型： 期刊论文

发表时间： 2012-09-01

发表刊物： SIGNAL PROCESSING

收录刊物： SCIE、EI、Scopus

卷号： 92

期号： 9

页面范围： 2238-2247

ISSN号： 0165-1684

关键字： Cyclostationarity; Impulsive noise; Fractional lower-order statistics; Time-difference-of-arrival

摘要： In this paper, new signal-selective methods for the estimation of time-difference-of-arrival in the presence of interfering signals and non-Gaussian symmetric alpha-stable impulsive noise are introduced. First, the performance degradation of the conventional approaches based on second-order cyclic statistics is presented. Then, two new classes of robust algorithms are developed using the theory of stable distributions and the cyclostationary property, including the pth-order cyclostationarity methods and the fractional lower-order cyclostationarity methods. It is shown that these new methods are tolerant to interference and robust in both Gaussian and non-Gaussian impulsive noise environments. The improved performance is demonstrated through detailed theoretical analysis and simulations. (C) 2012 Elsevier B.V. All rights reserved.