This letter designs a correlation-based secure beamformer for correlated multiple-input-single-output wiretap channels with multiple noncollaborating passive single-antenna eavesdroppers. The outage-probability-constrained secrecy rate maximization problem is investigated under the assumption that the source has accurate main channel information and statistical wiretap channel information. As the correlation provides some useful information, a more precise statistical distribution of the wiretap channel can be obtained, with which a closed-form expression for the secrecy outage probability is derived and a specific secure beamformer is designed. Simulation results show that the secrecy rate under the transmit power and secrecy outage constraints is improved.

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相关 MISO 窃听通道的基于相关性的安全传输

这封信设计了一种基于相关的安全波束成形器，用于具有多个非协作无源单天线窃听器的相关多输入单输出窃听通道。在信源具有准确的主信道信息和统计窃听信道信息的假设下，研究了中断概率约束保密速率最大化问题。由于相关性提供了一些有用的信息，因此可以获得更精确的窃听通道统计分布，由此推导出保密中断概率的闭式表达式，并设计特定的安全波束形成器。仿真结果表明，在发射功率和保密中断约束下，保密率得到提高。