点击次数：

论文类型： 期刊论文

发表时间： 2015-11-01

发表刊物： DIGITAL SIGNAL PROCESSING

收录刊物： SCIE、EI

卷号： 46

页面范围： 68-80

ISSN号： 1051-2004

关键字： Cyclostationarity; alpha-Stable process; Impulsive noise; Time difference of arrival (TDOA); Frequency difference of arrival (FDOA)

摘要： The problem of jointly estimating time difference of arrival (TDOA) and frequency difference of arrival (FDOA) or Doppler has a variety of practical applications. The conventional cyclic ambiguity function and the fractional lower-order ambiguity function suffer performance degradation in the presence of non-Gaussian alpha-stable impulsive noise and corruptive interference. To overcome these drawbacks, a new robust signal-selective algorithm for cyclostationary signals based on the fractional lower-order cyclostationarity is proposed. The new method makes use of cyclostationarity features and fractional lower-order statistics, and is highly tolerant to interference and robust to both Gaussian noise and non-Gaussian alpha-stable impulsive noise. The robustness and effectiveness of the proposed method in the presence of impulsive noise and interference are demonstrated by comparing it with the cyclostationarity-based and fractional lower-order statistics (FLOS)-based methods. (C) 2015 Elsevier Inc. All rights reserved.