Title :
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
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;
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
DOI :
10.1109/ISCIT.2010.5665148
