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作 者:尹黄江 杨玲 胡久松 贺正芸[1] YIN Huangjiang;YANG Ling;HU Jiusong;HE Zhengyun(College of Railway Transportation,Hunan University of Technology,Zhuzhou Hunan 412007,China)
机构地区:[1]湖南工业大学轨道交通学院,湖南株洲412007
出 处:《湖南工业大学学报》2025年第3期39-47,共9页Journal of Hunan University of Technology
基 金:湖南省自然科学基金资助项目(2021JJ50051)。
摘 要:基于译码转发中继探究了多天线半双工中继系统的隐蔽通信,即以装配有多天线的源节点分别在两个阶段中以迫零波束赋形(ZFB)和随机选择干扰(RSJ)的传输方案扰乱Willie检测,从而保护隐蔽信息的传输。首先,推导了Willie在两个阶段中的最优检测阈值和最小检测错误概率;其次,基于平均最小检测错误概率约束的情况下,推导、分析和优化了第一阶段源节点的发射功率和第二阶段中继节点的转发功率,并获取了各阶段的最大有效隐蔽速率;最后,根据各阶段的隐蔽性能指标,推导了系统总的传输中断概率和最大有效隐蔽速率。实验结果表明,当天线数量n≥3时,系统总的传输中断概率随着天线数量的增加而减小,并且系统总的最大有效隐蔽速率同第二阶段相同。An investigation is made of a multi-antenna half-duplex relay covert communication system based on decoding and forwarding relay.By using a source node equipped with multiple antennas,the Willie detection is disrupted in two stages through transmission schemes of zero forcing beamforming(ZFB)and randomized selection jamming(RSJ),respectively,so as to protect the transmission of covert information.Firstly,the optimal detection threshold and minimum detection error probability of Willie in two stages are to be derived.Secondly,based on the constraint of average minimum detection error probability,the transmission power of the source node in the first stage and the forwarding power of the relay node in the second stage are derived,analyzed,and optimized,thus obtaining the maximum effective covert rate of each stage.Finally,based on the steganographic performance metrics of each stage,the total transmission interruption probability and the total maximum effective steganographic rate of the system can be derived.The experimental results show that when the number of antennas is no less than 3,the total transmission interruption probability of the system decreases with the increase in the number of antennas,and the total maximum effective steganographic rate of the system is the same as that of the second stage.
关 键 词:迫零波束赋形 随机选择干扰 多天线 传输中断概率 最大有效隐蔽速率
分 类 号:TN918[电子电信—通信与信息系统]
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