级联纠错码在OFDM水声通信体制中的应用研究  

A study on the application of RS-Turbo cascaded error correction codes in OFDM hydro acoustic communication regimes

作　　者：马先杰 宋培军 江潮辉 韩云涛 MA Xianjie;SONG Peijun;JIANG Chaohui;HAN Yuntao(College of South China Sea Research,Harbin Engineering University,Sanya 572025,China;No.703 Research Institute of CSSC,Harbin 150078,China)

机构地区：[1]哈尔滨工程大学南海研究院,海南三亚572025 [2]中国船舶集团有限公司第七〇三研究所,黑龙江哈尔滨150078

出　　处：《应用科技》2025年第1期41-47,共7页Applied Science and Technology

基　　金：海南省自然科学基金项目(622MS163).

摘　　要：为研究复杂的时变−空变−频变水声信道的稳定性和可靠性,利用仿真方法对级联纠错码进行仿真分析。首先研究基于Bellhop射线模型的水声信道模型,该模型在海洋环境参数给定的条件下可以精确仿真信道;其次,研究卷积码、里所码(reed-solomon codes,RS codes)和Turbo码的编译码方式,在此基础上提出一种RS−Turbo级联编码方案,并通过系统仿真在加性高斯白噪声信道下研究了以上4种纠错编码方案在水声正交频分复用(orthogonal frequency division multiplexing,OFDM)通信系统中的误码率性能,同时还对该方案进行传输图片仿真实验。将此RS−Turbo级联码方案应用于OFDM水下通信,比较接收端误码率和恢复图像的质量,证明该方法的有效性,本研究对提高系统的稳定性和可靠性有一定的参考价值。In order to study the effect of complex time-varying-space-varying-frequency-varying hydroacoustic channel on the stability and reliability of hydroacoustic communication,the cascaded error correction code was simulated and analyzed by using the simulation method.Firstly,a hydroacoustic channel model based on the Bellhop ray model was studied to accurately simulate the channel under the given condition of the marine environment parameters;Then,the compilation modes of convolutional code,reed-solomon(RS)code and Turbo code were investigated,based on which an RS-Turbo cascaded coding scheme was proposed.And then the bit error ratio(BER)performance of the above four error correction schemes was investigated by system simulation under additive white Gaussian noise(AWGN)channel in the hydroacoustic orthogonal frequency division multiplexing(OFDM)communication system.Meanwhile,the transmission picture simulation experiments were also carried out for this scheme.Applying this RS-Turbo cascade code scheme to OFDM underwater communication and comparing the BER and the quality of recovered images at the receiver terminal,the effectiveness of the method is proved.This study has some reference value for improving stability and reliability of the system.

关 键 词：水声信道 正交频分复用系统 纠错编码 卷积码 里所码 Turbo码 级联编码 误码率 

分 类 号：TN911.2[电子电信—通信与信息系统]