退化高斯窃听信道下极化码加密编码算法研究

摘要

With the development of communication technology, the transmission security requirements from the system and user have also become more demanding.In this paper, a physical layer encryption security coding algorithm is proposed on the basis of a polarized code, in order to solve the physical layer security problem of a degraded Gauss eavesdropping channel.The algorithm divides the channel into a set of secure channels and a set of non-secure chan-nels .The information transmitted in the non-secure channels is encrypted by the information transmitted in the secure channel, and then encoded in order to achieve the safety and reliability of data transmission.The theoretical analysis and simulation results show that the proposed algorithm can guarantee reliable communication between legitimate us-ers, while preventing an eavesdropper from decoding data information;thereby, the reliability and safety of the com-munication system can be improved.Moreover, the proposed algorithm can effectively save channel resources and im-prove the channel utilization rate by sending information via the secure and non-secure channels.%针对退化高斯窃听信道下的物理层安全问题,本文提出了一种基于极化码的物理层加密安全编码算法.该算法将信道分解为安全信道集合及非安全信道集合,并利用安全信道发送的信息对非安全信道发送的信息加密后再进行编码,从而实现数据信息传输的可靠性和安全性.理论分析及仿真试验结果表明:在退化高斯窃听信道下,所提出的加密编码算法能保证合法用户间的可靠通信、防止窃听者破译数据信息,提高了通信系统的可靠性和安全性.此外,该算法利用安全信道和非安全信道发送数据信息,有效地节省信道资源,提高信道利用率.