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本文研究了非理想信道状态信息(channel state information,CSI)下经典4点(信源、信宿、中继、窃密者)模型的物理层保密中断性能.在此模型中,考虑窃密信道为单输入多输出,也就是信源、中继均为单天线,信宿、窃密者均为多天线.信宿和窃密者均采用最大比合并分集策略处理接收到的多径信号,中继分别采用解码放大转发(decode-and-forward,DF)和随机放大转发(randomize-andforward,RF)两种方式向信宿转发信息.信源通过中继向信宿发送信息时,信源与中继、中继与信宿两跳通信过程均遭到窃密者的窃听.在非理想CSI下,本文分别推导出了DF与RF中继转发下保密中断概率的闭式表达式及渐近表达式,并通过Monte Carlo仿真验证了理论模型的正确性.
In this paper, we study the physical layer security interrupt performance of the classical 4-point (source, sink, relay, privacy) model under the non-ideal channel state information (CSI) Multi-output, that is, the source, the relay are single-antenna, the sink, the theft are the multi-antenna.Filter and theft are using the maximum ratio of merging diversity strategy to deal with the received multipath signal, the relay using the amplified decoding (DF) and randomize-and-forward (RF) to send information to the destination. When the source sends information to the destination through the relay, the source and the relay, the relay and the destination two In the case of non-ideal CSI, the closed-form expression and asymptotic expression of the probability of disruption of privacy under DF and RF relay forwarding are deduced respectively. The Monte Carlo simulation results show that The correctness of the theoretical model.