存在窃听者的协作中继NOMA系统安全性能分析  

Security performance analysis of NOMA cooperative relay system with the presence of eavesdropper

作　　者：张继荣[1] 刘玉 ZHANG Jirong;LIU Yu(School of Continuous Education,Xi’an University of Posts and Telecommunications,Xi’an 710061,China;School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]西安邮电大学继续教育学院,陕西西安710061 [2]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2023年第2期19-28,共10页Journal of Xi’an University of Posts and Telecommunications

摘　　要：在不完全信道状态信息和非理想连续干扰消除条件下对存在窃听者的非正交多址系统安全性能问题进行研究,提出一个存在窃听者的解码转发中继辅助非正交多址接入系统(Decode and Forward Cooperative Relay in Non-Orthogonal Multiple Access System with Eavesdropper,DFCR-E-NOMA)。在该系统中,分析了在不完全的信道状态信息和非理想连续干扰消除同时存在的条件下系统的安全性能,利用中断概率和截获概率表征系统的安全性能,通过蒙特卡罗模拟仿真分析了功率分配系数、信道估计误差对所提系统性能的影响。验证结果表明,在信道条件一定的情况下,可通过设置较高的数据传输速率,在基站或中继处选择合适的功率分配系数能够有效降低窃听者的截获概率。The security performance of non-orthogonal multiple access systems with eavesdroppers is studied under the conditions of incomplete channel state information and non-ideal continuous interference cancellation.A new decoding and forwarding relay assisted non-orthogonal multiple access system with eavesdroppers(DFCR-E-NOMA)is proposed.In the system,the security performance of the system under simultaneous presence of incomplete channel state information and non-ideal successive interference cancellation is analyzed,and the security performance of the system is characterized by the interruption probability and interception probability,and the effects of power allocation coefficient and channel estimation error on the performance of the proposed system are analyzed by the Monte Carlo simulation.The verification results show that under fixed channel conditions,the interception probability of eavesdroppers can be effectively reduced by setting a higher data transmission rate and choosing a suitable power allocation coefficient at the base station or relay.

关 键 词：非正交多址接入 信道状态信息 连续干扰消除 协作中继 中断概率 截获概率 

分 类 号：TN911.1[电子电信—通信与信息系统]