Joint iterative equalization and decoding for underwater acoustic communications

Author

Zhao, Liang ; Ge, Jianhua

Author_Institution

State Key Lab. of ISN, XIDIAN Univ., Xi´´an, China

fYear

2010

Firstpage

1074

Lastpage

1078

Abstract

In this paper, serially concatenated trellis coded modulation (SCTCM) technology is adopted to improve the bandwidth efficiency of underwater acoustic channel. In order to overcome multi-path distortion and eliminate inter-symbol interference (ISI), the turbo theory is applied to form joint iterative multi-channel adaptive decision feedback equalizer (MC-ADFE) and decoder of SCTCM. In joint iterative equalization and decoding algorithm, the MC-ADFE and decoder of SCTCM exchange soft information in an iterative manner, which can enhance the equalizer performance using significant decoding gain. The simulation results show that proposed system scheme can improve the performance of equalizer and get considerable coding gain. So, the performance of underwater acoustic communication system has been improved greatly.

Keywords

concatenated codes; distortion; intersymbol interference; iterative decoding; trellis codes; underwater acoustic communication; ISI; MC-ADFE; SCTCM technology; bandwidth efficiency; intersymbol interference; iterative decoding; iterative equalization; multichannel adaptive decision feedback equalizer; multipath distortion; serially concatenated trellis coded modulation; turbo theory; underwater acoustic communication; Decoding; Equalizers; Estimation; Iterative decoding; Joints; Modulation; Underwater acoustics;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies (ISCIT), 2010 International Symposium on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-7007-5

Electronic_ISBN

978-1-4244-7009-9

Type

conf

DOI

10.1109/ISCIT.2010.5665148

Filename

5665148