为了探求影响电力通信系统数据安全传输的关键因素,构建基于解码转发(decode-and-forward,DF)中继和非正交多址接入(non-orthogonal multiple access,NOMA)技术辅助的电力线通信(power line communication,PLC)系统,并研究其安全传输性能.针对外部窃听和内部窃听两种情况,联合考虑背景噪声和脉冲噪声的影响,分析系统的可达速率、遍历安全速率和安全中断概率等性能,并利用高斯-切比雪夫求积方法获得其相应的闭合表达式.结果表明:较高的脉冲噪声会降低系统的频谱效率和安全传输性能;功率分配系数以及源用户到中继用户的距离均对系统安全传输产生显著影响.进一步地,通过蒙特卡罗仿真实验验证了理论分析的正确性.
Security performance analysis of power line communication system based on DF-NOMA
In order to explore the key factors affecting the data security transmission of power com-munication system,a power line communication system based on decode-and-forward relay and non-orthogonal multiple access(NOMA)technology is constructed,and its security transmission per-formance is studied.Considering the influence of background noise and impulse noise jointly,the achievable rate,ergodic secure rate and secure outage probability of the system are analyzed for the case of external wire-tap and internal wire-tap.The corresponding closed expressions are obtained by using Gaussian Chebyshev quadrature method.The results show that higher impulse noise will reduce the spectral efficiency and safe transmission performance of the system.And the power allo-cation coefficient and the distance from the source user to the relay user also have a significant impact on the system security transmission.Furthermore,the correctness of the theoretical analysis is verified by Monte Carlo simulation experiments.
power line communicationnon-orthogonal multiple accessphysical layer securityerg-odic secrecy ratesecrecy outage probability
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维普
