【摘要】 异构网络配置全维度多天线利用垂直维度能够有效提高系统的传输速率,然而也会造成信号的泄露,影响系统的物理层安全性能。基于此,该文在异构网络下行链路中,全维度天线采用波束成形方法消除干扰,应用随机几何的分析方法,得到合法用户的安全连接概率闭合表达式,其安全连接概率与异构网络基站密度有关。仿真结构验证了安全连接概率结论的正确性,同时在给定的场景中,确定了异构网络基站的密度值。更多还原

【Abstract】 Heterogeneous network with full-dimensional(FD) multiple-input multiple-output(MIMO) can effectively improve the transmission rate by developing vertical dimensions; however, it can cause the signal leakage and decrease the system’s physical layer security performances. In this paper, using the beamforming to eliminate the interference in the downlink of the heterogeneous network, we propose an analysis method with stochastic geometric theory to obtain the closed-form expression of the secure connection probability on the legitimate users. The secure connection probability is related to the density of heterogeneous network small cell base stations(BSs). Simulation results verify the correctness of the safety connection probability, and determine the density value of heterogeneous network BS in a given scenario.更多还原