联合编码的中继系统不等错误保护机制

doi:10.13190/j.jbupt.2020-099

北京邮电大学学报 ›› 2021, Vol. 44 ›› Issue (1): 59-65.doi: 10.13190/j.jbupt.2020-099

联合编码的中继系统不等错误保护机制

陈辰, 周林, 陈启望, 陈燕, 贺玉成

华侨大学信息科学与工程学院, 厦门 361021

收稿日期:2020-07-29 出版日期:2021-02-28 发布日期:2021-09-30
通讯作者: 周林(1982-),男,副教授,硕士生导师,E-mail:linzhou@hqu.edu.cn. E-mail:linzhou@hqu.edu.cn
作者简介:陈辰(1990-),女,讲师,硕士生导师.
基金资助:
国家自然科学基金青年项目（61901182）；福建省自然科学基金青年项目（2020J05056）；华侨大学引进人才项目

Unequal Error Protection Scheme Based on Joint Coding for Relay Systems

CHEN Chen, ZHOU Lin, CHEN Qi-wang, CHEN Yan, HE Yu-cheng

School of Information Science and Engineering, Huaqiao University, Xiamen 361021, China

Received:2020-07-29 Online:2021-02-28 Published:2021-09-30

摘要/Abstract

摘要： 在多样化信息传输的通信系统中，若无差别地传输具有不同统计特性与不同重要性的信源，将带来能量资源的浪费.鉴于此，以信源特性为依据，提出了一种结合联合编码与中继译码转发的不等错误保护编译码方案.在发送端，针对经离散余弦变换后图像信源的统计特性和重要性程度采取相应的传输策略：对熵值较小且重要程度不高的高频信息进行信源压缩，提高传输效率；对重要程度较高的低频信息利用中继进行二次信道编码，实现不等保护.在接收端，设计多模块联合迭代译码方式，充分利用不同传输策略下不同形式的信源信息，提升系统性能.理论分析和仿真结果表明，对比传统方案，所提方案在相同的峰值信噪比下，有1 dB以上的信噪比增益.

关键词: 不等错误保护, 中继协作, 联合信源信道编码, 图像传输

Abstract: In the mobile communication system with diversified information transmission,if the sources with different statistical characteristics and different importance are transmitted without difference,the energy resources would be wasted. Therefore,based on the characteristics of the source,an unequal error protection scheme combining joint source channel coding in relay system is proposed. The proposed scheme adopts different transmission strategies according to the source statistical characteristics and the importance:the high frequency information with low entropy and less importance is compressed to improve the transmission efficiency,and the low frequency information with more importance is coded once more in relay to provide more protection. At the receiver,a joint decoding method including multiple module iterations is designed to improve system performance by making full use of the different representation of the source information under different transmission strategies. Analysis and simulation show that compared with the traditional schemes,the proposed scheme has more than 1 dB performance gain under the same peak signal-to-ratio.

Key words: unequal error protection, relay cooperation, joint source channel coding, image transmission

中图分类号:

TN911.22

陈辰, 周林, 陈启望, 陈燕, 贺玉成. 联合编码的中继系统不等错误保护机制[J]. 北京邮电大学学报, 2021, 44(1): 59-65.

CHEN Chen, ZHOU Lin, CHEN Qi-wang, CHEN Yan, HE Yu-cheng. Unequal Error Protection Scheme Based on Joint Coding for Relay Systems[J]. Journal of Beijing University of Posts and Telecommunications, 2021, 44(1): 59-65.

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联合编码的中继系统不等错误保护机制

Unequal Error Protection Scheme Based on Joint Coding for Relay Systems

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