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

doi:10.3969/j.issn.0372-2112.2019.06.004

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

更新时间：2025-07-02

- An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios
- Acta Electronica Sinica Vol. 47, Issue 6, Pages: 1209-1215(2019)
- 作者机构：
  
  重庆大学通信与测控中心,重庆,400044
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61501066);Chongqing Research Program of Basic and Frontier Technology (No.cstc2015jcyjA40003);Chongqing Postgraduate Research and Innovation Project (No.CYS18061);Fundamental Research Funds for the Central Universities (No.106112017CDJXY500001)
- DOI：10.3969/j.issn.0372-2112.2019.06.004
  CLC： TN929.5
- Published：2019
- 稿件说明：
移动端阅览
An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios[J]. Acta Electronica Sinica, 2019, 47(6): 1209-1215.
DOI：

An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios[J]. Acta Electronica Sinica, 2019, 47(6): 1209-1215. DOI： 10.3969/j.issn.0372-2112.2019.06.004.

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.

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.

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