Underwater acoustics communications in a time-varying environment

Author

Wasserblat, M. ; Tabrikian, J.

fYear

2000

fDate

2000

Firstpage

452

Lastpage

455

Abstract

This paper addresses the problem of underwater acoustic channel estimation for communications in time-varying environments. In the case of a rapidly time-varying environment, the channel needs to be estimated and tracked continuously. Prior information on the channel can be used to improve channel estimation performance. In this paper, a priori statistics on the channel time-variations are used in order to obtain a maximum a posteriori estimator for channel tap-coefficients. The results demonstrate performance gain of 5-10 dB in terms of signal-to-noise ratio in decision-feedback equalizer mean-squared error, compared to the least-squares method, which ignores the a priori statistics on the channel time-variations

Keywords

decision feedback equalisers; maximum likelihood estimation; mean square error methods; time-varying channels; underwater acoustic communication; 5 to 10 dB; a priori statistics; acoustic channel estimation; channel tap-coefficients; decision-feedback equalizer mean-squared error; maximum a posteriori estimator; performance gain; signal-to-noise ratio; time-varying environment; underwater acoustic communications; Channel estimation; Decision feedback equalizers; Error analysis; Maximum a posteriori estimation; Performance gain; Signal to noise ratio; Statistics; Underwater acoustics; Underwater communication; Underwater tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and electronic engineers in israel, 2000. the 21st ieee convention of the

Conference_Location

Tel-Aviv

Print_ISBN

0-7803-5842-2

Type

conf

DOI

10.1109/EEEI.2000.924469

Filename

924469