异构密集网中一种抗多窃听者的协作安全波束成形方案

发布时间：2018-09-18 18:55

【摘要】：为保证异构密集网中多个窃听者联合窃听时宏基站用户的下行通信安全,该文提出一种抗多窃听者的协作安全波束成形方案。该方案通过联合设计宏基站和微基站的最优协作波束成形矢量,使保密信息传输速率提升的同时,其他用户的下行信号进一步干扰窃听者,从而最大化系统安全速率。为获得最优的协作波束成形矢量,在考虑其他合法用户的服务质量及基站功率限制时,对该安全速率最大化问题进行建模。采用半定松弛技术及Lagrange对偶理论将原始的非凸优化问题转化为一系列的半定规划问题进行求解。仿真结果验证了所提方案的有效性和安全性。
[Abstract]:In order to ensure the downlink communication security of Acer station users when multiple eavesdroppers are eavesdropping together in heterogeneous dense networks, a cooperative secure beamforming scheme against multiple eavesdroppers is proposed in this paper. By jointly designing the optimal cooperative beamforming vector of the macro base station and the microbase station, the scheme improves the transmission rate of the secure information and further interferes with the eavesdroppers by the downlink signals of other users, thus maximizing the security rate of the system. In order to obtain the optimal cooperative beamforming vector, the security rate maximization problem is modeled taking into account the quality of service of other legitimate users and the power constraints of the base station. The semidefinite relaxation technique and Lagrange duality theory are used to transform the original non-convex optimization problem into a series of semidefinite programming problems. Simulation results verify the effectiveness and security of the proposed scheme.
【作者单位】：国家数字交换系统工程技术研究中心;
【基金】：河南省科技攻关计划项目(152102210013) 国家863计划项目(2015AA01A708) 国家自然科学基金(61171108,61471396)~~
【分类号】：TN918;TN929.5

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