基于编码与信噪一体化的窃听信道模型研究  

Research on the Wiretap Channel Based on Coding and Integration of Signal and Artificial Noise

作　　者：杨志良[1,2] 安建平[1] 李祥明[1] 王爱华[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]中北大学信息与通信工程学院,山西太原030051

出　　处：《北京理工大学学报》2015年第9期956-960,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61271258;61301089);国家教育部高等学校博士学科点专项科研基金资助课题(20131101110027);国家"八六三"计划项目(2014AA01A707)

摘　　要：提出一种LDPC编码与信号噪声一体化联合设计建立窃听信道模型的方法,以保证信息的安全传输.在LDPC编码的设计中加入了扰码,给出了扰码矩阵的设计方法;在保证合法用户具有较高可靠性的前提下,采用信号噪声一体化设计恶化窃听者信道,建立了最小化保密中断概率模型,并给出了简化算法.仿真结果表明,经过扰码的LDPC编码具有相对较小的安全间隔.在保证合法用户具有10-5误比特率的前提下,信噪一体化设计可实现窃听端较低的保密中断概率,使窃听端的信息误比特率以极大的概率保持在0.5.A method applying LDPC code and integration of signal and artificial noise was proposed for designing the wiretap channel model to ensure the security of information transmission.The scrambling matrix was designed and used in LDPC code.Ensured intend receiver with high reliability,the integration of signal and artificial noise was applied to deteriorate the eavesdropper channel,to establish a minimized outage probability model and to simplify the algorithm.The simulation results show that,LDPC codes possess a very small secrecy gap after scrambling.On the premise of keeping the BER of intend receiver in 10-5,integration of signal and artificial noise can make the eavesdropper have low outage probability and the BER of eavesdropper stay around 0.5with great probability.

关 键 词：窃听信道 信噪一体化 低密度奇偶校验码 保密中断概率 

分 类 号：TN918[电子电信—通信与信息系统]