用于水声相干通信系统的联合迭代均衡和译码算法

doi:10.3969/j.issn.1001-2400.2011.04.011

J4 ›› 2011, Vol. 38 ›› Issue (4): 61-65.doi: 10.3969/j.issn.1001-2400.2011.04.011

• Original Articles • Previous Articles Next Articles

Joint iterative equalization and decoding for underwater acoustic coherent communication systems

ZHAO Liang;GE Jianhua

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China)

Received:2010-06-17 Online:2011-08-20 Published:2011-09-28
Contact: ZHAO Liang E-mail:zhl@xidian.edu.cn

Abstract

Abstract:

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

Key words: underwater acoustic communication, serially concatenated trellis coded modulation (SCTCM), adaptive decision feedback equalizer, joint iterative equalization and decoding algorithm (JIED)

CLC Number:

TN911.7，TN929.3

ZHAO Liang;GE Jianhua. Joint iterative equalization and decoding for underwater acoustic coherent communication systems[J].J4, 2011, 38(4): 61-65.

References

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Joint iterative equalization and decoding for underwater acoustic coherent communication systems

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