干扰影响下无线携能通信双向中继系统中断性能分析  

Outage Performance Analysis of SWIPT Bidirectional Relay System with Interference Effects

作　　者：王国仲[1,2] 彭醇陵 周徐 WANG Guozhong;PENG Chunling;ZHOU Xu(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Communication Engineering,Chongqing College of Electronic Engineering,Chongqing 401331,China;School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China;Network Optimization Center,China Mobile Group Chongqing Company Limited,Chongqing 401121,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆电子工程职业学院通信工程学院,重庆401331 [3]重庆理工大学电气与电子工程学院,重庆400054 [4]中国移动通信集团重庆有限公司网络优化中心,重庆401121

出　　处：《计算机工程》2023年第3期185-191,202,共8页Computer Engineering

基　　金：重庆市教委科学技术研究项目(KJQN202003106,KJQN201901103,KJQN202103102);重庆市自然科学基金委员会面上项目(cstc2019jcyj-msxmX0233);重庆理工大学科研启动基金(2019ZD127);重庆电子工程职业学院自然科学类项目(XJWT202108)。

摘　　要：在无线携能通信双向中继系统中,大量无线信息发射源会导致系统性能受到同频干扰的影响。以基于射频能量收集的双向中继网络为研究对象,结合功率分离能量收集和解码转发信息转发方式,建立中继和接收端分别受到多个干扰源影响下的无线携能通信双向中继通信系统传输模型,在3个时隙信息能量同传的传输帧结构下,得到系统端到端信干噪比,并分析该传输模型下的中断性能。利用数学推导得出该系统在瑞利信道环境下的端到端信干噪比的累积分布函数闭式解,在此基础上求解中断概率闭式值,并通过数值仿真探讨干扰源个数、干扰功率以及功率分割比对系统中断概率的影响。仿真结果表明,所求中断概率闭式表达式与蒙特卡洛仿真中断概率曲线完全吻合,双向中继传输能有效降低系统中断概率,其中干扰源个数越多、干扰功率越大对系统的中断性能影响越大,但不影响系统的分集度,并且存在一个最优功率分割比值可使系统的中断性能达到最优,从而提升整个系统的传输性能。In a Simultaneous Wireless Information and Power Transfer(SWIPT)bidirectional relay system,a large number of wireless information transmission sources will affect the performance of the system.Therefore,taking the bidirectional relay network based on radio frequency energy collection as the research object,the Power Splitting(PS)energy collection and Decode and Forward(DF)information forwarding modes are combined to establish a transmission model of a bidirectional relay communication system with multiple interference sources in this study.Under a transmission frame structure consisting of three time slots,the end-to-end signal-to-interference-noise ratio of the SWIPT system is obtained,and the Outage Probability(OP)under this transmission model is analyzed.Then,the closed value of the OP of the system is obtained by mathematical deduction.Finally,the influence of the number of interference sources,interference power,and power splitting ratio on the OP of the system is discussed and analyzed through numerical simulation.The simulation results show that the closed-form expression of the OP is completely consistent with the Monte Carlo(MC)simulation interruption probability curve.As expected,in this bidirectional transmission scenario,the OP is reduced as the number and power of interference sources increases,although there is no effect on the diversity of the system.The analysis indicates that there is a power splitting ratio that optimizes the OP of the system,thus improving the transmission performance of the entire system.

关 键 词：双向中继 无线携能通信 中断概率 功率分割 干扰影响 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]