Closed-Form Symbol Error Rate Expressions for Non-Orthogonal Multiple Access Systems

被引：45
作者：
He, Qinwei [1 ]
Hu, Yulin [1 ]
Schmeink, Anke [1 ]
机构：
[1] RWTH Aachen Univ, ISEK Res Grp, D-52074 Aachen, Germany
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2019年 / 68卷 / 07期
关键词：
Non-orthogonal multiple access (NOMA); power allocation; reliability; symbol error rate (SER); EFFICIENT RESOURCE-ALLOCATION; CHALLENGES;
D O I：
10.1109/TVT.2019.2917579
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：
In this paper, the reliability performance of a non-orthogonal multiple access (NOMA) system is addressed. We characterize the reliability performance of the users in a down-link power domain NOMA system with arbitrary ordered pulse-amplitude modulation and quadrature amplitude modulation. In particular, the exact symbol error rate (SER) expressions are derived. Furthermore, by taking the power allocation between users into account, a reliability optimization problem is formulated, which minimizes the SER of the user with a good channel quality while guaranteeing the reliability requirement for the user with a relatively poor channel. Based on the characterized SER model, a suboptimal power allocation approach for this problem is provided with a performance extremely close to the optimal solution. Through simulations, we validate the provided SER characterization and confirm the effectiveness of the proposed suboptimal power allocation policy.
引用
收藏
页码：6775 / 6789
页数：15
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