Title of Paper:Joint estimation of time difference of arrival and frequency difference of arrival for cyclostationary signals under impulsive noise

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Date of Publication:2015-11-01

Journal:DIGITAL SIGNAL PROCESSING

Included Journals:SCIE、EI

Volume:46

Page Number:68-80

ISSN No.:1051-2004

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

Abstract: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.