无率码增强无线中继网络抗干扰防窃听性能的关键技术研究

项目名称： 无率码增强无线中继网络抗干扰防窃听性能的关键技术研究

项目编号： No.61471076

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 雷维嘉

作者单位： 重庆邮电大学

项目金额： 80万元

中文摘要： 由于传输环境的开放性，无线通信信号极易受到干扰，且传输信息泄漏风险较大。在极具应用潜力的无线中继网络中，该问题更加突出和困难。传统的扩频、加密编码等安全技术面临越来越大的挑战。本项目将无率码应用于无线中继网络，增强系统的抗干扰、防窃听性能。无率码在两个层次上应用：一是作为数据包级的纠删码对数据进行编码，编码数据包分由多条路径传输；分散传输可减少信息被截获的风险，同时也对可靠传输有利。二是作为高性能的符号级纠错码，提高传输的抗噪声、抗干扰能力；即使窃听者截获了信道上传输的数据，无率码的随机编码特性也使其难以破译信息。项目将重点对伪随机性的无率码的编码设计和编码信息的安全交换进行研究，找到性能符合要求的伪随机纠删和纠错无率码的设计方法和编码产生方法，并设计一种高效的多中继多跳传输协议。项目的工作对中继传输和物理层安全技术的研究和应用具有重要的价值。

中文关键词： 物理层安全；无率码；协作中继；抗干扰；防窃听

英文摘要： Wireless communication is susceptible to jamming and eavesdropping. Traditional security technologies such as spread spectrum modulation and encryption codes are facing greater challenges. Rateless codes are employed in this project to enhance the anti-jamming and anti-eavesdropping performance in wireless relay networks. They will be used in two layers. First, they will be used as erasure correcting codes to encode the source data, which will then be transmitted by multiple paths. Dispersed transmission is of great help to reduce the risk of being wire-tapped and to improve the reliability. Second, rateless codes will be used as high performance error correcting codes to improve the anti-noise and anti-interference performance of transmission. Furthermore, the random nature of rateless codes will make it difficult for eavesdroppers to decipher. This project focuses on the design of pseudo random rateless codes, the safe interchange method of the information about codes between the encoder and the decoder, and the design of an effective multi-hop relay protocol, which together make this project valuable, both theoretically and practically, to the physical security of wireless communications.

英文关键词： physical security;rateless codes;cooperative relay;anti-jamming;anti-eavesdropping