Title of Paper:Robust joint estimation for time delay and Doppler frequency shift based on generalised sigmoid cyclic cross-ambiguity function

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Date of Publication:2017-05-01

Journal:IET RADAR SONAR AND NAVIGATION

Included Journals:SCIE、EI

Volume:11

Issue:5

Page Number:721-728

ISSN No.:1751-8784

Key Words:impulse noise; delay estimation; frequency estimation; cochannel interference; robust joint estimation method; time delay; Doppler frequency shift; generalised sigmoid cyclic cross-ambiguity function; tuneable sigmoid cyclic correlation; relative estimator; impulsive noise; co-channel interference; theoretical analysis

Abstract:In this study, a novel concept, i.e. the tuneable sigmoid cyclic correlation, is proposed, and a relative estimator, named the generalised sigmoid cyclic cross-ambiguity function, is also derived to deal with impulsive noise and co-channel interference. Based on these concepts, a robust joint estimation method for time delay and Doppler frequency shift is proposed as well. Both theoretical analysis and simulations demonstrate the superior performances of the proposed approach over other existing methods, especially under strong impulsive noise.