高速移动环境下基于动态CSI的MIMO系统改进模代数预编码

doi:10.3969/j.issn.0372-2112.2019.06.004

电子学报 ›› 2019, Vol. 47 ›› Issue (6): 1209-1215.DOI: 10.3969/j.issn.0372-2112.2019.06.004

高速移动环境下基于动态CSI的MIMO系统改进模代数预编码

廖勇, 胡异, 杨馨怡, 姚海梅, 张楠

重庆大学通信与测控中心, 重庆 400044

收稿日期:2018-07-02 修回日期:2018-12-18 出版日期:2019-06-25
- 通讯作者:
- 廖勇
- 作者简介:
- 胡异女,1994年生于重庆.现为重庆大学微电子与通信工程学院研究生,主要研究方向为高速移动通信中的预编码研究.E-mail:huyi0417@foxmail.com;杨馨怡 女,1996年生于四川绵阳.现为重庆大学微电子与通信工程学院研究生,主要研究方向为高速移动通信中的预编码研究.E-mail:yangxinyi@cqu.edu.cn;姚海梅 女,1992年生于江西吉安.现为重庆大学微电子与通信工程学院研究生,主要研究方向为人工智能算法及其在无线通信中的应用.E-mail:meimei@cqu.edu.cn;张楠女,1995年生于四川自贡.现为重庆大学微电子与通信工程学院研究生,主要研究方向为高速移动通信中的信道估计算法.E-mail:Zhang0nan@cqu.edu.cn
- 基金资助:
- 国家自然科学基金 (No.61501066）; 重庆市基础与前沿研究计划项目 (No.cstc2015jcyjA40003）; 重庆市研究生科研创新项目 (No.CYS18061）; 中央高校基本科研业务费重点基金 (No.106112017CDJXY500001）

An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios

LIAO Yong, HU Yi, YANG Xin-yi, YAO Hai-mei, ZHANG Nan

Center of Communication and TT & C, Chongqing University, Chongqing 400044, China

Received:2018-07-02 Revised:2018-12-18 Online:2019-06-25 Published:2019-06-25

摘要/Abstract

摘要： 针对高速移动场景下信道快时变特性给多输入多输出（Multiple Input Multiple Output，MIMO）系统预编码带来的技术挑战，提出基于动态信道状态信息（Channel State Information，CSI）的MIMO系统改进模代数预编码（Tomlinson-Harashima Precoding，THP）算法.该算法利用信道统计量信息以及相关性构建动态CSI模型，更准确实时地体现当前信道状况；进一步地，提出一种基于循环遍历搜索的多用户调度算法，以最大化信干噪比为目标进行用户调度，且将多用户调度算法应用到THP中，提高了预编码精度.仿真结果表明，所提算法相比传统预编码算法具有更优的误码率性能和信道容量，验证了所提算法能有效地适应高速移动场景.

关键词: 高速移动, MIMO系统, 动态信道状态信息, 模代数预编码, 用户调度, 信干噪比

Abstract: Aiming at the technical challenges brought about by the fast time-varying characteristics of the channel in high-speed scenes to precoding in multiple input multiple output (MIMO) system,this paper proposes an improved Tomlinson-Harashima precoding (THP) algorithm for MIMO systems based on the dynamic channel state information (CSI) model.Channel statistical information and correlations are exploited to compensate instantaneous CSI,which could reflect current real-time channel status exactly.Further,aimed at maximizing the signal to interference plus noise ratio,a multi-user scheduling algorithm based on loop traversal search is proposed.And the multi-user scheduling algorithm is applied to THP,which could improve the precoding accuracy of the traditional THP.Simulation results show that the proposed scheme can be efficiently applied to high-speed mobile scenario,and improve bit error ratio performance as well as channel capacity.

Key words: high-speed mobility, MIMO system, dynamic channel state information, Tomlinson-Harashima precoding, user scheduling, signal to noise ratio

中图分类号:

TN929.5

廖勇, 胡异, 杨馨怡, 姚海梅, 张楠. 高速移动环境下基于动态CSI的MIMO系统改进模代数预编码[J]. 电子学报, 2019, 47(6): 1209-1215.

LIAO Yong, HU Yi, YANG Xin-yi, YAO Hai-mei, ZHANG Nan. An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios[J]. Acta Electronica Sinica, 2019, 47(6): 1209-1215.

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高速移动环境下基于动态CSI的MIMO系统改进模代数预编码

An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios

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