On the Achievable Spectral Efficiency of Spatial Modulation Aided Downlink Non-Orthogonal Multiple Access

被引：36

作者：

Wang, Xuesi ^{[1
]}

Wang, Jintao ^{[1
]}

He, Longzhuang ^{[1
]}

Tang, Zihan ^{[1
]}

Song, Jian ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2017年 / 21卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Non-orthogonal multiple access (NOMA); spatial modulation (SM); spectral efficiency (SE); mutual information (MI); lower bound;

D O I：

10.1109/LCOMM.2017.2707068

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this letter, a novel spatial modulation aided non-orthogonal multiple access (SM-NOMA) system is proposed. We use mutual information (MI) to characterize the achievable spectral efficiency (SE) of the proposed SM-NOMA system. Due to the finite-alphabet space-domain inputs employed by SM, the expression of the corresponding MI lacks a closed-form formulation. Hence, a lower bound is proposed to quantify the MI of the SM-NOMA system. Furthermore, its asymptotic property is also theoretically investigated in both low and high signal-tonoise ratio regions. The SE performance and its analysis of our proposed SM-NOMA system are confirmed by simulation results.

引用

页码：1937 / 1940

页数：4

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