全双工网络的友好干扰协作机制和功率分配

Friendly Jamming Cooperative Scheme and Power Allocation in Full-Duplex Network

在无线全双工中继网络中,假设中继节点是不可信任的,为了改善合法用户的物理层安全性能,利用友好干扰节点向中继节点发射干扰信号进行协作,且为了获得帮助,合法用户需向干扰节点支付一定的费用。基于此协作干扰机制,讨论了如何对友好干扰节点进行有效的功率分配,从而使得合法用户获得的效用达到最优。理论分析和仿真结果表明,由于中继节点采用了全双工技术,且利用友好干扰节点进行协作,并在此基础上进行最优功率分配,合法用户的物理层安全性能可得到有效提高。

In wireless full-duplex relay network,the relay node is assumed to be untrusted.In order to enhance the physical layer security of legitimate user,the friendly jammers are proposed to transmit interference signals to the untrusted relay node for cooperation.The legitimate user must pay the costs to friendly jammers for gaining help.Based on this cooperative jamming scheme,the power allocation problem of friendly jammers for maximizing the physical layer security of legitimate users was discussed.Theoretical analysis and simulation results show that when the relay nodes adopt full duplex technology and cooperate with the friendly jammers,and the optimal power allocation is also carried out according to the scheme,the physical layer security of the legitimate users can be effectively improved.