浅海水声信道中重复累积码性能研究

doi:10.3969/j.issn.1000-1093.2012.02.008

兵工学报 ›› 2012, Vol. 33 ›› Issue (2): 179-185.doi: 10.3969/j.issn.1000-1093.2012.02.008

浅海水声信道中重复累积码性能研究

张兰^1,2，许肖梅^1,2，冯玮^1,2，陈友淦^1,2

(1.厦门大学信息科学与技术学院, 福建厦门 361005;2.厦门大学水声通信与海洋信息技术教育部重点实验室福建厦门 361005)

收稿日期:2010-06-11 修回日期:2010-06-11 上线日期:2014-03-04
作者简介:张兰(1987—)，女，博士研究生
基金资助:
国家自然科学基金资助项目(41176032);中央高校基本科研业务费专项资金资助项目（2010121032）（20112G020）；厦门大学基础创新科研基金资助项目（201112G020）

Performance Analysis of Repeat-Accumulate Codes over Shallow Water Acoustic Channels

ZHANG Lan^1,2， XU Xiao-mei^1,2， FENG Wei^1,2， CHEN You-gan^1,2

(1.School of Information Science and Technology of Xiamen University, Xiamen 361005, Fujian, China;2.Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of theMinistry of Education, Xiamen University, Xiamen 361005, Fujian, China)

Received:2010-06-11 Revised:2010-06-11 Online:2014-03-04

摘要/Abstract

摘要： 针对浅海水声信道的强多途、长时延、严重衰落等特点，需采用性能好、能够实现线性编译码便于实时处理的信道纠错码技术以提高水声通信系统可靠性的问题，提出重复累积(Repeat-Accumulate针对浅海水声信道的强多途、长时延、严重衰落等特点，需采用性能好、能够实现线性编译码便于实时处理的信道纠错码技术以提高水声通信系统可靠性的问题，提出重复累积(Repeat-AccumulateRA)码作为浅海水声信道的纠错码方案。建立RA码在浅海水声信道中的仿真模型，比较其在不同浅海水声信道模型下的性能，通过水池数据传输实验研究编译码参数对RA码性能的影响，并以水下图像传输实验进一步验证该编码方案。仿真和实验结果表明：RA码在浅海水声通信系统中具有较强的纠错能力，选择合适的参数会进一步提高编码增益。与Turbo码和LDPC码的编译码复杂度对比，RA码能够实现线性时间编译码，算法复杂度低，硬件实现简单，在水声通信中具有非常好的应用前景。

关键词: 通信技术, 信道编码, 重复累积码, 浅海水声信道, 水声通信

Abstract: Due to a large delay spread caused by multipath propagation and severe attenuation of the channel conditions, the Repeat-Accumulate (RA) code with short length codes, good performance and easy implementation has been proposed to enhance the reliability of the shallow water acoustic (SWA) communication system. A system model including RA coding over the SWA channels was established. As a comparison, the performance of RA codes under different ocean acoustic channel conditions was presented. The experiment in the pool was carried out to show how the encoding and decoding parameters affect the performance of RA codes, which was verified by the image transmission over channels in the pool tank. The simulation and experimental results show that RA codes have a strong error correction capability and the codes with appropriate parameters would further improve the coding gain, while they enjoy encoding and decoding in linear time and have simple hardware implementation, which have a good applied prospect in underwater acoustic communication system.

Key words: communication technology, channel coding, repeatedly-accumulated code, shallow water acoustic channel, underwater acoustic communication

中图分类号:

TN929.3

张兰，许肖梅，冯玮，陈友淦. 浅海水声信道中重复累积码性能研究[J]. 兵工学报, 2012, 33(2): 179-185.

ZHANG Lan， XU Xiao-mei， FENG Wei， CHEN You-gan. Performance Analysis of Repeat-Accumulate Codes over Shallow Water Acoustic Channels[J]. Acta Armamentarii, 2012, 33(2): 179-185.

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浅海水声信道中重复累积码性能研究

Performance Analysis of Repeat-Accumulate Codes over Shallow Water Acoustic Channels

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