Title of Paper:Fractional time delay estimation algorithm based on the maximum correntropy criterion and the Lagrange FDF

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Date of Publication:2015-06-01

Journal:SIGNAL PROCESSING

Included Journals:SCIE、EI

Volume:111

Page Number:222-229

ISSN No.:0165-1684

Key Words:Fractional time delay estimation; Correntropy; Maximum correntropy criterion; Lagrange FDF

Abstract:In this paper, a novel algorithm for fractional time delay estimation is proposed. It is based on the maximum correntropy criterion and the Lagrange fractional delay filter (FDF). The instantaneous correntropy is introduced to measure the similarity between received signals and estimated ones in the proposed algorithm. It leads to an effective performance under both Gaussian and impulsive noises. The performances, including the convergence of the algorithm and the variance of the time delay estimation, are theoretically analyzed. Simulations demonstrate that the time delay estimation precision of the proposed algorithm is higher than that utilizing the mixed modulated Lagrange explicit time delay estimation (MMLETDE) especially under low generalized signal-to-noise ratio (GSNR). (C) 2014 Elsevier B.V. All rights reserved.