基于Polar码的物理层安全编码技术研究

项目名称： 基于Polar码的物理层安全编码技术研究

项目编号： No.61501508

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张应宪

作者单位： 中国人民解放军陆军工程大学

项目金额： 21万元

中文摘要： 物理层安全编码技术是物理层安全技术研究的重要方面，是近年来编码技术研究的重要内容。作为第一种能从理论上证明可获得Shannon极限性能的编码方案，Polar码应用于物理层安全编码领域具有独特的优势。然而，现有Polar安全编码方案大都建立在窃听系统安全容量存在的条件上：一方面不能适用于不同物理信道环境的窃听系统；另一方面也很难应用于实际的通信系统。为此，本课题围绕“如何设计适用于一般(广义)窃听系统的Polar安全编码方案” 展开研究，具体内容包括： 1）基于信道极化原理，研究Polar码理论性能与物理信道环境参数之间的关系，便于分析和证明Polar码的安全性；2）以安全容量为指标，研究适用于一般窃听系统的Polar安全编码方法；3）以安全带为指标，研究可获得较高SG性能的Polar安全编码方法。本课题的研究工作有助于促进物理层安全编码技术更加实用化，为未来通信系统的安全性提供技术参考。

中文关键词： 物理层安全编码；Polar码；窃听系统；安全容量；安全带

英文摘要： Physical layer secure coding (PLSC) is one of the most important research field of the physical layer security (PLS), and it is also a hot topic on the coding techniques. As the first provable Shannon-Capacity achieving coding scheme, polar codes are well suitable for the secure applications. However, as it shown in existing works that, the existing secure coding schemes based on polar codes rely on an assumption that the wiretap channel is degraded with respect to the main channel, which is hard to be extended to different wiretap systems and is also difficult to be satisfied in practical communication systems. To this end, this project focuses on the problems of “how to design practical polar codes with good bit error rate (BER) and security performance,” and several topics are investigated, which include: 1) according to the channel polarization theory, the relationship between the security performance of polar codes and the characteristics of the physical channels is driven; 2) based on the estimation of the security capacity, secure coding schemes using polar codes for the general wiretap system will be designed; 3) with the estimation of the security gap (SG), coding scheme based on polar codes will be proposed. Results of this project will promote practical implementations of the PLSC, and they will also provide reference for the security techniques of the future communication systems. Therefore, the main topics of this project have both theoretical interests and practical values.

英文关键词： physical layer secure coding (PLS);polar codes;wiretap system;security capacity;security gap