基于NOMA的双向中继D2D通信容量扩展  

Capacity scaling for two-way relay-assisted D2D communication based on NOMA

作　　者：顾蔡晨 王斌[1,2] 黄纯华[1] 王文鼐 Gu Caichen;Wang Bin;Huang Chunhua;Wang Wennai(College of Telecommunications&Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Lab of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学宽带无线通信与传感网技术教育部重点实验室,江苏南京210003

出　　处：《电子技术应用》2023年第11期83-87,共5页Application of Electronic Technique

基　　金：国家自然科学基金(61372125,61401234);江苏省科技支撑计划(工业)项目(BE2013019);江苏省高校自然科学研究重大项目(10KJA510037)。

摘　　要：对D2D(Device to Device)通信系统的容量扩展问题进行了研究,提出了一种双向中继辅助的D2D通信系统,该系统采用非正交多址接入(Non-Orthogonal Multiple Access,NOMA)。首先分析了各信号的信干噪比(SINR),接着详细计算了每个信号的累积分布函数(Cumulative Distribution Function,CDF)和概率密度函数(Probability DensityFunction,PDF),并据此推导出了系统遍历总容量的解形式。除此之外,还分析了OMA系统的遍历总容量,与NOMA系统进行对比。仿真结果表明,NOMA系统的可达速率优于OMA系统,双向中继能够比传统的单向中继获得更高的容量。A two-way relay-assisted device to device(D2D)communication system using non-orthogonal multiple access(NOMA)is proposed to solve the capacity scaling for D2D communication system.Firstly,the signal to interference noise ratio(SINR)of each signal is analyzed,and according to the cumulative distribution function(CDF)and probability density function(PDF)of each signal,the solution form of the ergodic sum capacity of the system is obtained.In addition,the ergodic sum capac‐ity of orthogonal multiple access(OMA)system is analyzed and compared with NOMA system.Simulation results show that com‐pared with OMA system,the achievable capacity of the system can be improved when NOMA is used,and the two-way relay scheme can make the system obtain higher capacity than the traditional one-way relay scheme.

关 键 词：D2D NOMA 双向中继 遍历总容量 

分 类 号：TN929.5[电子电信—通信与信息系统]