水声中 LDPC码和码性能比较研究

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (7): 92–.

水声中 LDPC码和码性能比较研究

刘胜兴1,2* 付强1,2

出版日期:2015-12-21 发布日期:2015-12-21
作者简介:(1. 厦门大学应用海洋物理与工程系,厦门,361102; 2. 厦门大学水声通信与海洋信息技术教育部重点实验室,厦门,361102)
基金资助:
基金项目:国家自然科学基金(41276038)
收稿日期:2015-06-30
*通讯联系人,E-mail:liusx@xmu.edu.cn

Performance comparison of LDPC code with Turbo code over underwater acoustic channels

Liu Shengxing1, 2* Fu Qiang1, 2

Online:2015-12-21 Published:2015-12-21
About author: (1. Department of Applied Ocean Physics and Engineering, Xiamen University, Xiamen 361005, China; 2. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University, Xiamen 361005, China)

摘要/Abstract

摘要： 信道纠错编码对提高水声通信系统的误比特性能具有重要意义。本文将信道译码器和自适应判决反馈均衡器级连，比较研究了非规则 LDPC 码、 (3,6) 规则 LDPC 码和 Turbo 码在浅海水声信道中的性能。结果表明：短码长时，三种纠错编码的性能基本相同，但随着码长的增大，非规则 LDPC 码的性能明显优于 Turbo 码和规则 LDPC 码。当码长 8000 ，误比特率 10^-4 时，非规则 LDPC 码的性能比 Turbo 码和规则 LDPC 码分别提高了约 0.23 和 0.33 dB 。

Abstract: Channel error-correct coding is very important for underwater acoustic communication systems to improve their bit error rate performance. Combining channel decoder with adaptive decision feedback equalizer, this paper compares performance of an irregular LDPC code, (3, 6)-irregular LDPC code and a Turbo code over multipath shallow water acoustic channel. Computer simulations show that the three channel codes have almost the same performances at the short code length. However, the irregular LDPC code obtains much more performance improvement than the Turbo code and the regular LDPC code with the increase of code length. Performance of the irregular LDPC code is 0.23 and 0.33 dB better than that of the Turbo code and the regular code at the code length of 4000 and the bit error rate of 10^-4

刘胜兴1,2* 付强1,2. 水声中 LDPC码和码性能比较研究[J]. 南京大学学报(自然科学版), 2015, 51(7): 92–.

Liu Shengxing1, 2* Fu Qiang1, 2. Performance comparison of LDPC code with Turbo code over underwater acoustic channels[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(7): 92–.

参考文献

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