DocumentCode :
676673
Title :
Time delay estimation using Scatter Search algorithm for underwater acoustic channel
Author :
Zhang Chan ; Lei Zhixiong ; Yang Kunde
Author_Institution :
Inst. of Acoust. Eng., Northwestern Polytech. Univ., Xi´an, China
fYear :
2013
fDate :
22-25 Oct. 2013
Firstpage :
1
Lastpage :
4
Abstract :
To overcome the shortcoming of low resolution of the matched filtering method when estimating time delays, the WRELAX algorithm of the Nonlinear Least-Squares (NLS) parameters estimation problem is commonly used. However, the computing time of the WRELAX algorithm is long. In this paper, the Scatter Search (SS)-based WRELAX algorithm is applied in underwater acoustical channel computation. Multipath time delay estimation of a CW signal is calculated in Gaussian white noise channel with three SNR conditions of 20dB, 10dB, and 0 dB. Simulation results show that the SS-based WRELAX algorithm reaches a higher resolution than the conventional matched filtering method. Moreover, the SS algorithm can reduce the iteration number a lot comparing with the Gauss-Newton algorithm in the process of searching the minimum objective function value.
Keywords :
AWGN channels; Newton method; channel estimation; delay estimation; least squares approximations; matched filters; multipath channels; search problems; underwater acoustic communication; CW signal; Gauss-Newton algorithm; Gaussian white noise channel; NLS parameters estimation problem; SNR condition; SS-based WRELAX algorithm; iteration number; matched filtering method; minimum objective function value; multipath time delay estimation; nonlinear least-square parameter estimation problem; scatter search algorithm; underwater acoustic channel; Channel estimation; Delay effects; Estimation; Signal processing algorithms; Signal resolution; Signal to noise ratio; Scatter Search algorithm; WRELAX algorithm; multipath time delay estimation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
TENCON 2013 - 2013 IEEE Region 10 Conference (31194)
Conference_Location :
Xi´an
ISSN :
2159-3442
Print_ISBN :
978-1-4799-2825-5
Type :
conf
DOI :
10.1109/TENCON.2013.6718802
Filename :
6718802
Link To Document :
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