基于中继间干扰消除的轮流转发系统安全传输方案

发布时间：2018-08-28 12:13

【摘要】：针对轮流转发系统中非信任中继窃听的问题,提出一种基于中继间干扰消除的安全传输方案。首先,利用可信中继与非信任中继交替转发产生的中继间干扰,恶化非信任中继的窃听条件。然后,利用信号在时域上的相关性进行干扰迭代消除,完全消除合法用户处中继间干扰,提升合法用户接收信号质量。在此基础上,提出了以最小化窃听和容量为目标的快速功率分配算法。分析和仿真结果表明,方案在保障通信效率的同时抑制了非信任中继的窃听,在仿真条件下,系统的保密速率提升了至少2 bit·s-1·Hz-1。
[Abstract]:In order to solve the problem of non-trusted relay eavesdropping in alternate forwarding system, a secure transmission scheme based on inter-relay interference cancellation is proposed. Firstly, the interference between trusted relay and untrusted relay is used to worsen the eavesdropping condition of untrusted relay. Then the interference is eliminated iteratively by using the correlation of the signal in time domain to eliminate the interference between the legitimate users completely and improve the quality of the received signals by the legitimate users. On this basis, a fast power allocation algorithm aiming at minimizing eavesdropping and capacity is proposed. The results of analysis and simulation show that the scheme not only guarantees the communication efficiency but also suppresses the eavesdropping of the untrusted relay. Under the simulation condition, the security rate of the system increases at least 2 bit s-1 Hz-1..
【作者单位】：国家数字交换系统工程技术研究中心;
【基金】：国家高技术研究发展计划(“863”计划)基金资助项目(No.2014AA01A701) 国家自然科学基金资助项目(No.61379006,No.61521003,No.61701538)~~
【分类号】：TN92

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