Performance Analysis and Optimization in Two-Way Cooperative NOMA Under Two-Phase Transmission Protocol

被引：8
作者：
Ma, Long [1 ]
Li, Enyu [1 ]
Yang, Qianqian [1 ]
Wang, Xinjie [1 ]
Song, Chuanwang [1 ]
机构：
[1] Qingdao Univ Technol, Sch Informat & Control Engn, Qingdao 266520, Peoples R China
来源：
IEEE SYSTEMS JOURNAL | 2022年 / 16卷 / 03期
关键词：
Imperfect successive interference cancellation (SIC); nonorthogonal multiple access (NOMA); outage probability; power allocation; throughput; two-phase transmission protocol; two-way cooperative system; NONORTHOGONAL MULTIPLE-ACCESS; PHYSICAL LAYER SECURITY; RELAY SELECTION; NETWORKS; SYSTEMS;
D O I：
10.1109/JSYST.2022.3178074
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this article, a novel two-phase transmission protocol is proposed to help the bidirectional transmission in a user-aid two-way cooperative nonorthogonal multiple access system, where superposition coding, bit-level Exclusive-Or operation, and successive interference cancellation (SIC) techniques are employed for improving the spectrum efficiency and throughput. Considering the residual interference generated in the practice process of decoding, both the perfect SIC and the imperfect SIC scenarios are discussed. Besides, the power allocation factor alpha(1) and alpha(2) are optimized under the perfect SIC to reduce the total outage probability, whose closed-formexpression is derived and verified by simulations. Also, the approximated outage performance is derived in imperfect SIC scenario. Furthermore, two other conventional two-phase protocols and one three-phase protocol are provided as the benchmark to compare the outage probability and throughput with the proposed protocol, which shows the superiority of the proposed two-phase protocol and power allocation.
引用
收藏
页码：3566 / 3577
页数：12
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