Group-Based Successive Interference Cancellation for Multi-Antenna NOMA System with Error Propagation  

作　　者：Cheng Hu Hong Wang Changxiang Li Rongfang Song 

机构地区：[1]School of Network and Communication,Nanjing Vocational College of Information Technology,Nanjing 210023,China [2]School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China [3]National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China

出　　处：《China Communications》2023年第8期276-287,共12页中国通信（英文版）

基　　金：supported in part by the National Natural Science Foundation of China under Grant 62171235 and Grant 62171237;in part by the Qinglan Project of Jiangsu Province;in part by the Open Research Foundation of National Mobile Communications Research Laboratory of Southeast University under Grant 2023D01.

摘　　要：Non-orthogonal multiple access(NOMA)is viewed as a key technique to improve the spectrum efficiency and solve the issue of massive connectivity.However,for power domain NOMA,the required overall transmit power should be increased rapidly with the increasing number of users in order to ensure that the signal-to-interference-plus-noise ratio reaches a predefined threshold.In addition,since the successive interference cancellation(SIC)is adopted,the error propagation would become more serious as the order of SIC increases.Aiming at minimizing the total transmit power and satisfying each user’s service requirement,this paper proposes a novel framework with group-based SIC for the deep integration between power domain NOMA and multi-antenna technology.Based on the proposed framework,a joint optimization of power control and equalizer design is investigated to minimize transmit power consumption for uplink multi-antenna NOMA system with error propagations.Based on the relationship between the equalizer and the transmit power coefficients,the original problem is transformed to a transmit power optimization problem,which is further addressed by a parallel iteration algorithm.It is shown by simulations that,in terms of the total power consumption,the proposed scheme outperforms the conventional OMA and the existing cluster-based NOMA schemes.

关 键 词：multi-antenna NOMA group-based successive interference cancellation error propagation power control 

分 类 号：TN929.5[电子电信—通信与信息系统]