A New Designed MIMO-NOMA Scheme for HSR System with Distributed Antennas

2019 IEEE 5th International Conference on Computer and Communications (ICCC) Pub Date : 2019-12-01 DOI:10.1109/ICCC47050.2019.9064479

Zecheng Zhang, Yang Liu

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Abstract

This paper investigates the MIMO-NOMA transmission scheme for high-speed railway (HSR). To the best of our knowledge, this is the first work that attempts to implement NOMA principle into HSR wireless system. Attracted by the technological superiority of distributed antenna system (DAS) and MIMO-NOMA, we propose a new transmission scheme and compare it with the conventional transmission strategy. We treat each antenna unit of the distributed antenna system as an independent user, group these users at each time slot, and apply NOMA principles within each group. We adopt a simple method to ensure that users with large channel state differences are grouped into the same cluster, and introduce average service rate to measure the system performance. At the same time, we have discussed the effect of fixed power allocation and dynamic power allocation on the system transmission rate within MIMONOMA and MIMO-OMA. The simulation results illustrate that the dynamic power allocation scheme is superior to the fixed power allocation, and the MIMO-NOMA system we proposed is always superior to the conventional MIMO-OMA scheme in high speed railways.

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高铁分布式天线MIMO-NOMA新方案设计

研究高速铁路MIMO-NOMA传输方案。据我们所知，这是第一次尝试将NOMA原理应用到高铁无线系统中。鉴于分布式天线系统(DAS)和MIMO-NOMA的技术优势，提出了一种新的传输方案，并与传统的传输策略进行了比较。我们将分布式天线系统的每个天线单元视为一个独立的用户，在每个时隙对这些用户进行分组，并在每个分组中应用NOMA原则。我们采用一种简单的方法将信道状态差异较大的用户分组到同一个集群中，并引入平均服务率来衡量系统性能。同时，讨论了MIMONOMA和MIMO-OMA中固定功率分配和动态功率分配对系统传输速率的影响。仿真结果表明，动态功率分配方案优于固定功率分配方案，所提出的MIMO-NOMA系统在高速铁路中始终优于传统的MIMO-OMA方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE 5th International Conference on Computer and Communications (ICCC)

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