安全双向中继通信中友好干扰节点的功率分配

摘要

This paper studies the secure information exchange for two-way relay transmission with friendly jammers. The two models, where the eavesdropper is relay node and the eavesdropper is another node are both considered. Our goal is to seek the power allocation for the friendly jammers to minimize the total power of them such that the secrecy of the information exchange between the two sources can be protected. To this end, we formulate two optimization problems for the two models, and prove both of the two models are linear programming. Simulation results show that, via optimal design for the power of friend jammers, physical layer secrecy can be greatly improved.%研究了具有一组友好干扰节点辅助的双向中继网络中的安全传输问题,考虑了中继节点不可信为窃听节点和中继节点可信而存在其他窃听节点的两种情况下,友好干扰节点的功率分配问题.目的是设计友好干扰的最优功率分配方案,在友好干扰节点的功率消耗最小的情况下,达到双向中继系统的通信质量和通信安全性要求.本文为两种情形下的友好干扰节点功率分配问题分别建立了最优化模型,并证明了两个问题均属于线性规划问题.仿真结果表明,本文所设计友好干扰节点功率分配方案,能够在保证双向中继系统的通信质量和通信安全性前提下,使得友好干扰节点的总功率最小.