A Rotated-Constellation Based Method for BER Analysis in Uplink NOMA Systems

被引：1
|
作者：
Wang, Yifeng [1 ,2 ]
Zhou, Ting [2 ,3 ]
Xu, Tianheng [2 ,3 ]
Hu, Honglin [2 ]
机构：
[1] Univ Chinese Acad Sci, Sch Microelect, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
[3] Shanghai Frontier Innovat Res Inst, Shanghai 201108, Peoples R China
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2023年 / 72卷 / 02期
关键词：
NOMA; Detectors; Bit error rate; Uplink; Symbols; Modulation; Analytical models; Bit error rate (BER); non-orthogonal multiple access (NOMA); Rayleigh fading channel; joint maximum-likelihood (JML) detection; rotated-constellation based method; NONORTHOGONAL MULTIPLE-ACCESS; DOWNLINK;
D O I：
10.1109/TVT.2022.3209866
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Non-orthogonal multiple access (NOMA) is one of candidate technologies in the next generation radio access networks, in which the joint maximum-likelihood (JML) detector has the optimal estimation performance. In this paper, we propose a rotated-constellation based method to regularize the decision boundaries of received constellation. Through regular decision boundaries, we further derive the approximate closed-form BER expressions of uplink NOMA systems in Rayleigh fading channels. Numerical results verify the effectiveness of rotated-constellation based method and conform to our derivation. It is also shown through simulations that the proposed analysis method outperforms conventional method in terms of accuracy.
引用
收藏
页码：2632 / 2637
页数：6
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