Iterative multi-channel equalization and decoding for high frequency underwater acoustic communications

In this paper, an iterative multi-channel equalization and decoding technique is introduced to improve system performance in underwater acoustic communications. The turbo principle is applied to the existing canonical receiver structure including fractionally spaced decision feedback equalization wi...

Full description

Saved in:
Bibliographic Details
Main Authors: Jun Won Choi, Drost, R.J., Singer, A.C., Preisig, J.
Format: Conference Proceeding
Language:English
Subjects:
Binary phase shift keying
Channel estimation
equalization
Equalizers
iterative
Iterative decoding
Least squares approximation
lms
Phase shift keying
Receivers
turbo
underwater
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, an iterative multi-channel equalization and decoding technique is introduced to improve system performance in underwater acoustic communications. The turbo principle is applied to the existing canonical receiver structure including fractionally spaced decision feedback equalization with phase synchronization. The performance of multi-channel equalization and adaptive weight update algorithms are aided by soft information delivered from the channel decoder. The complexity of the proposed scheme is shown to be reasonable for highly reverberant underwater channels since it has linear complexity by the use of the least mean square (LMS) algorithm. Experimental results for data transmission at 41.67 k symbol/s with a carrier frequency of 100 kHz demonstrate the feasibility of the proposed algorithm.
ISSN:1551-2282
2151-870X
DOI:10.1109/SAM.2008.4606839