.png){kind=icon}
返回
Code-aided non-orthogonal multiple access in downlink multiuser MIMO system
.png){kind=icon}
PRE
AI
DOI：10.1016/j.jfranklin.2019.06.003.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Conventional downlink non-orthogonal multiple access (NOMA) uses the power domain for multiple access and applies successive interference cancellation (SIC) to mitigate intra-cluster interference. It requires sophisticated user terminals (UTs) clustering, moreover, imperfect SIC results in error propagation that severely degrades system capacity. In this paper, a novel code-aided multiuser multiple-input multiple-output NOMA (MIMO-NOMA) framework for downlink transmission is proposed. Since the total number of UTs in a cell is in general more than the number of transmit antennas at the base station (BS), purely zero-forcing (ZF) downlink beamforming is unable to mitigate multiuser interference (MUI). We first propose a simple grouping algorithm that separate all UTs in a cell into several clusters, with cluster number less than or equal to BS antennas. ZF-based multiuser beamforming is then employed to remove the inter-cluster interference. To mitigate the intra-cluster interference, we propose to modulate the downlink data for each UT within the same cluster by orthogonal codes, thereby, instead of SIC, matched-filtering can be employed at each UT for interference suppression. Computer simulation results quantify the capacity gain of the proposed coded-aided MIMO-NOMA method over conventional MIMO-NOMA schemes. (C) 2019 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
Keyword:
MASSIVE MIMO
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
J
IF:
3.7
论文数:
6.4K
被引数:
1.5W
机构
引用论文
.png){kind=icon}
Impact of User Pairing on 5G Nonorthogonal Multiple-Access Downlink Transmissions用户配对对5g非正交多址下行链路传输的影响
PREAI
分享收藏
查看更多内容