Asynchronous NOMA for Downlink Transmissions

被引：39

作者：

Cui, Jianxiong ^{[1
]}

Dong, Guangliang ^{[1
]}

Zhang, Shengli ^{[2
]}

Li, Haitao ^{[1
]}

Feng, Guinian ^{[1
]}

机构：

[1] Beijing Inst Tracking & Telecommun Technol, Beijing 100094, Peoples R China

[2] Shenzhen Univ, Coll Informat Engn, Shenzhen 518060, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2017年 / 21卷 / 02期

关键词：

ANOMA; symbol asynchronism; WD detection; achievable rate-region; NONORTHOGONAL MULTIPLE-ACCESS; SELECTION;

D O I：

10.1109/LCOMM.2016.2619339

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, we propose a novel symbol-asynchronous non-orthogonal multiple access (ANOMA) scheme for downlink transmissions. First, ANOMA introduces an artificial symbol-offset between packets destined for different user equipment (UE) in order to reduce their mutual interference. Second, ANOMA adopts a pre-coding at the base station and a whitening-and-decomposing (WD) detection scheme at the receiving UE to simplify signal detection. With these two novel techniques, ANOMA can significantly enlarge the achievable rate region of the traditional non-orthogonal multiple access (NOMA). Moreover, the impact of pulse shape and symbol offset on the performance of ANOMA scheme are investigated in both Gaussian and Rayleigh block-fading channels. The numerical results show that ANOMA with precoding and WD detection outperforms asynchronous NOMA with successive interference cancellation detection, both outperform synchronous NOMA.

引用

页码：402 / 405

页数：4

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