LDPC卷积码在水声通信系统中的可靠性研究

doi:10.19665/j.issn1001-2400.2020.06.013

西安电子科技大学学报 ›› 2020, Vol. 47 ›› Issue (6): 84-90.doi: 10.19665/j.issn1001-2400.2020.06.013

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LDPC卷积码在水声通信系统中的可靠性研究

蔡子浩(),穆丽伟(),占利,刘强

华南师范大学物理与电信工程学院,广东广州 510006

收稿日期:2020-06-26 出版日期:2020-12-20 发布日期:2021-01-06
通讯作者: 穆丽伟
作者简介:蔡子浩(1997—),男,华南师范大学本科生, E-mail: caizihao@m.scnu.edu.cn
基金资助:
国家自然科学基金青年基金(61401164)

Research on the reliability of LDPC convolutional codes in the underwater acoustic communication system

CAI Zihao(),MU Liwei(),ZHAN Li,LIU Qiang

School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006,China

Received:2020-06-26 Online:2020-12-20 Published:2021-01-06
Contact: Liwei MU

摘要/Abstract

摘要：

为保证信号在水声信道上实现高可靠性传输,将低密度奇偶校验卷积码用于水声信道,研究其对信息可靠性的改进程度。采用结合了多径模型的梯度模型来模拟水声信道,依据滤波器组多载波技术抑制码间串扰和偏移正交幅度调制能够抑制相邻载波干扰的特性,搭建FBMC/OQAM水声信道通信系统。采用低密度奇偶校验卷积码作为信道编码方案,实现了多媒体音频和图像信号在水声信道上的无损传输。又进一步搭建了跳频水声通信仿真系统,将RC-LDPC卷积码用于该跳频水声通信系统,研究其译码性能。仿真结果表明,低密度奇偶校验卷积码在水声信道上有良好的误码率性能,实现了低误码率的信号传输,能有效地克服多径效应,提高信道利用率。因而,低密度奇偶校验卷积码可选作水声通信的信道编码方案。

关键词: 水声信道, 频率调制, 低密度奇偶校验卷积码

Abstract:

In order to ensure the high reliability of signal transmission in the underwater acoustic channel, LDPC convolutional codes are used to study the improvement of the information reliability in the underwater acoustic channel in this paper. The gradient model combined with the multipath model is adopted to simulate the underwater acoustic channel, and the FBMC/OQAM underwater acoustic channel communication system is built according to the characteristics that FBMC can suppress inter symbol interference and OQAM can suppress adjacent carrier interference. The LDPC convolutional code is adopted as the channel encoding scheme for realizing the lossless transmission of multimedia audio and image signals in the underwater acoustic channel. The RC-LDPC convolutional code is also used to study the decoding performance of the FH underwater acoustic communication system. Simulation results show that LDPC convolutional codes have a good bit error rate (BER) performance in the underwater acoustic channel, achieve a low BER signal transmission, and can effectively overcome the multipath effect and improve channel utilization. Thus, the LDPC convolutional code can be selected as the channel coding scheme for underwater acoustic communication.

Key words: underwater acoustic channel, frequency modulation, LDPC convolutional code

中图分类号:

TN911.22

蔡子浩,穆丽伟,占利,刘强. LDPC卷积码在水声通信系统中的可靠性研究[J]. 西安电子科技大学学报, 2020, 47(6): 84-90.

CAI Zihao,MU Liwei,ZHAN Li,LIU Qiang. Research on the reliability of LDPC convolutional codes in the underwater acoustic communication system[J]. Journal of Xidian University, 2020, 47(6): 84-90.

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LDPC卷积码在水声通信系统中的可靠性研究

Research on the reliability of LDPC convolutional codes in the underwater acoustic communication system

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