Resource Allocation Based on User Pairing and Subcarrier Matching for Downlink Non-Orthogonal Multiple Access Networks  

作　　者：Zhixin Liu Changjian Liang Yazhou Yuan Kit Yan Chan Xinping Guan 

机构地区：[1]Institute of Electrical Engineering,Yanshan University,Qinhuangdao 066004,China [2]School of Electrical Engineering,Computing and Mathematical Sciences,Curtin University,Perth,WA6102,Australia [3]Institute of Electrieal Engineering,Yanshan University,Qinhuangdao 066004,and also with School of Electronic,Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《IEEE/CAA Journal of Automatica Sinica》2021年第3期679-689,共11页自动化学报（英文版）

基　　金：This work was partly supported by the Natural Science Foundation of Hebei Province(F2019203095);the National Natural Science Foundation of China(61873223,61803328);the National Key R&D Program of China(2018YFB1702100)。

摘　　要：The traditional orthogonal multiple access(OMA)is unable to satisfy the needs of large number of smart devices.To increase the transmission rate in the limited spectrum resource,implementation of both non-orthogonal multiple access(NOMA)and successive interference cancelation(SIC)is essential.In this paper,an optimal resource allocation algorithm in NOMA is proposed to maximize the total system rate in a multi-sector multi-subcarrier relay-assisted communication network.Since the original problem is a non-convex problem with mixed integer programming which is non-deterministic polynomial-time(NP)-hard,a three-step solution is proposed to solve the primal problem.Firstly,we determine the optimal power allocation of the outer users by using the approach of monotonic discrimination,and then the optimal user pairing is determined.Secondly,the successive convex approximation(SCA)method is introduced to transform the non-convex problem involving central users into convex one,and the Lagrangian dual method is used to determine the optimal solution.Finally,the standard Hungarian algorithm is utilized to determine the optimal subcarrier matching.The simulation results show that resource allocation algorithm is able to meet the user performance requirements with NOMA,and the total system rate is improved compared to the existing algorithms.

关 键 词：Non-orthogonal multiple access(NOMA) power control rate maximization subcarrier matching user pairing 

分 类 号：TN929.5[电子电信—通信与信息系统]