摘要
多中继通信系统信息传输过程复杂,存在吞吐率下降、误码率高、安全性能差等问题.针对以上问题,提出多中继物理层网络编码系统与密钥加密技术联合设计的解决方案.首先,阐述三中继双向物理层网络编码系统加密传输的工作机制;然后,构建三中继物理层网络编码与LDPC码、加密算法联合通信模型,设计适应多路信号叠加的中继映射解决方案,推导出该系统的置信传播译码算法公式.实验仿真结果表明,采用的密钥加密技术能有效保证系统数据传输安全性,降低因多中继系统信息传输与信道窃听带来的性能损失;同时,LDPC编译码提升了该系统的译码准确率,系统解密能力得到改善,从而有效提高了多中继通信系统数据传输的有效性、可靠性.
In this paper,we propose a joint design scheme of multi-relay Physical-layer Network Coding(PNC)system with encryption technology and channel coding to solve the problems of multi-relay communication system such as the throughput decreasing,high Bit Error Rate(BER)and poor security performance.In the proposed scheme,we first introduce the three-relay two-way PNC transmission mode.The working principle of encryption algorithm and communication system collaboration is described.We then propose a joint system model of PNC,Low-Density Parity-Check(LDPC)code and encryption algorithm for the three-relay communication system.Numerical results show that the introduction of encryption technology can effectively guarantee the security of data transmission and reduce the performance loss caused by information transmission and channel eavesdropping in multi-relay system.The introduction of LDPC code,the BER of system is significantly reduced,the decryption ability of system is improved,the effectiveness and reliability of transmission for multi-relay system are effectively improved.
作者
唐猛
李海华
谢灵运
陈建华
TANG Meng;LI Hai-hua;XIE Ling-yun;CHEN Jian-hua(School of Information Science&Engineering,Yunnan University,Kunming 650500,Yunnan,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第4期652-662,共11页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(61861045)
云南大学博士科研项目(KL180012).
关键词
物理层网络编码
多中继
LDPC码
安全性能
Physical-layer Network Coding(PNC)
multiple relay
Low-Density Parity-Check(LDPC) code
security performance
