高铁场景下一种基于信噪比判决的双模切换信道估计算法

王传云; 王敏; 赵军辉; 尹燕

doi:10.11959/j.issn.1000-0801.2018199

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高铁场景下一种基于信噪比判决的双模切换信道估计算法

研究与开发 | 更新时间：2024-06-05

- 高铁场景下一种基于信噪比判决的双模切换信道估计算法
- A dual mode switching channel estimation algorithm based on SNR decision in high speed railway scenarios
- 电信科学 2018年34卷第7期页码：72-79
- 作者机构：
  
  1. 华东交通大学，江西南昌 330013
  2. 北京交通大学，北京 100044
- 作者简介：
  
  [ "王传云（1977-），男，华东交通大学信息工程学院院长助理、副教授、硕士生导师，主要研究方向为无线通信、微波电路与天线。" ]
  [ "王敏（1992-），女，华东交通大学信息工程学院硕士生，主要研究方向为无线通信、物联网技术等。" ]
  [ "赵军辉（1973-），男，华东交通大学信息工程学院院长，北京交通大学教授、博士生导师，主要研究方向为宽带无线和移动通信系统。" ]
  [ "尹燕（1978-），女，华东交通大学软件学院讲师，主要研究方向为复杂网络和物联网等。" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(61661021);江西省教育厅科学技术研究项目;Education Department Scientific and Technological Project of Jiangxi Province of China(GJJ150545)
- DOI：10.11959/j.issn.1000-0801.2018199
  中图分类号： TN929
- 网络出版日期：2018-07，
  
  纸质出版日期：2018-07-20
- 稿件说明：
移动端阅览
王传云, 王敏, 赵军辉, 等. 高铁场景下一种基于信噪比判决的双模切换信道估计算法[J]. 电信科学, 2018,34(7):72-79.

Chuanyun WANG, Min WANG, Junhui ZHAO, et al. A dual mode switching channel estimation algorithm based on SNR decision in high speed railway scenarios[J]. Telecommunications science, 2018, 34(7): 72-79.
王传云, 王敏, 赵军辉, 等. 高铁场景下一种基于信噪比判决的双模切换信道估计算法[J]. 电信科学, 2018,34(7):72-79. DOI： 10.11959/j.issn.1000-0801.2018199.

Chuanyun WANG, Min WANG, Junhui ZHAO, et al. A dual mode switching channel estimation algorithm based on SNR decision in high speed railway scenarios[J]. Telecommunications science, 2018, 34(7): 72-79. DOI： 10.11959/j.issn.1000-0801.2018199.

摘要

为了提高信道在信噪比大范围变化环境下信道估计的精度，确保高速铁路通信系统的可靠性，提出高铁场景下一种基于信噪比判决的双模切换信道估计算法。该算法利用离散卡—洛基扩展模型（discrete Karhunen-Loeve basis expansion model，DKL-BEM）及线性最小均方误差（linear minimum mean square error， LMMSE）算法进行信道建模和不同速度环境下的信道估计。仿真发现，当信噪比增大至某值时，基于ICI消除的二次信道估计算法性能劣于传统的DKL-BEM算法（出现交叉点），且交叉点值随速度的提高左移（小信噪比方向）。通过对参数分析和两种算法交叉点值的提取，给出交叉点随速度变化的移动轨迹，自适应地实现两种算法的切换，提高信道估计算法的适应性和有效性。

Abstract

A dual mode switching channel estimation algorithm based on SNR decision in high speed railway scenarios was proposed.The algorithm adopted DKL-BEM and LMMSE modelling the channel and estimating the channel under different speed conditions

respectively.The simulation results show that the SNR increased

the performance of the twice channel estimation algorithm based on ICI cancellation became worse than that of the traditional DKL-BEM algorithm

and a cross-point appeared

its value moved towards the small SNR as the speed increased.Through analyzing the parameters and extracting the cross-point values of the two algorithms

the moving trajectory of the cross-point with the speed changing was given.The proposed algorithm can adaptively achieve the switching between two algorithms and improve the applicability and effectiveness of the channel estimation algorithm.

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Keywords

references

刘云毅 , 赵军辉 , 王传云 . 高速铁路宽带无线通信系统越区切换技术 [J ] . 电信科学 , 2017 , 33 ( 11 ): 37 - 46 .

LIU Y Y , ZHAO J H , WANG C Y . Handover technology in high-speed railway broadband wireless communication system [J ] . Telecommunication Science , 2017 , 33 ( 11 ): 37 - 46 .

Bi Y M , ZHANG J H , ZENG M , et al . Channel modeling and estimation for OFDM systems in high-speed trains scenarios [C ] // The IEEE 83rd Vehicular Technology Conference,May15-18,2016,Nanjing,China . Piscataway:IEEE Press , 2016 : 1 - 6 .

HAO J X , WANG J T , PAN C Y . Low complexity ICI mitigation for MIMO-OFDM in time-varying channels [J ] . IEEE Transactions on Broadcasting , 2016 , 62 ( 3 ): 1 - 9 .

ABOUTORAB N , HARDJAWANA W , VUCETIC B . A new iterative doppler-assisted channel estimation joint with parallel ICI cancellation for high-mobility MIMO-OFDM systems [J ] . IEEE Transactions on Vehicular Technology , 2012 , 61 ( 4 ): 1577 - 1589 .

SHENG Z C , FANG Y , WANG C . A BEM method of channel estimation for OFDM systems in high-speed train environment [C ] // The International Workshop on High Mobility Wireless Communications,November 1-3,2013,Shanghai,China.[S.l.:s.n] . 2013 : 6 - 9 .

DENG L , CHENZ H , ZHAO Y S . Basis expansion model for channel estimation in LTE-R communication system [J ] . Digital Communications ＆ Networks , 2016 , 2 ( 2 ): 92 - 96 .

TEO K A D , OHNO S . Optimal MMSE finite parameter model for doubly-selective channels [C ] // IEEE Global Telecommunications Conference,Nov 29-Dec 3,2005,St.Louis,USA . Piscataway:IEEE Press , 2005 :3507.

江戬 . TD-LTE系统中信道估计技术研究 [J ] . 电信科学 , 2010 , 26 ( 11 ): 141 - 145 .

JIANG J . Research on channel estimation technology in TD-LTE system [J ] . Telecommunication Science , 2010 , 26 ( 11 ): 141 - 145 .

刘顺兰 , 汪佳丽 . 快时变OFDM系统中非采样间隔信道的信道估计 [J ] . 电信科学 , 2015 , 31 ( 9 ): 112 - 117 .

LIU S L , WANG J L . New channel estimation algorithm for non-sample-spaced channels in fast time-varying OFDM system [J ] . Telecommunication Science , 2015 , 31 ( 9 ): 112 - 117 .

蔡明 , 曾嵘 . 高速铁路中基于组导频的OFDM系统时变信道估计算法 [J ] . 铁道学报 , 2015 , 37 ( 5 ): 52 - 56 .

CAI M , ZENG R . Group-pilot-aided time-varying channel estimation for high-speed railway OFDM system [J ] . Railway Transaction , 2015 , 37 ( 5 ): 52 - 56 .

ZHAO Y , HAGGMAN S G . Intercarrier interference self-cancellation scheme for OFDM mobile communication systems [J ] . IEEE Transactions on Communications , 2001 , 49 ( 7 ): 1185 - 1191 .

MA J , ORLIK P V , ZHANG J , et al . Reduced-rate OFDM transmission for inter-subchannel interference self-cancellation over high-mobility fading channels [J ] . IEEE Transactions on Wireless Communications , 2012 , 11 ( 6 ): 2013 - 2023 .

李丹 , 柯峰 . 高速移动环境下基于OFDM的LTE系统ICI消除技术综述 [J ] . 重庆邮电大学学报(自然科学版) , 2013 , 25 ( 3 ): 292 - 299 .

LI D , KE F . ICI mitigation techniques for OFDM based LTE system over highly mobile environment:a survey [J ] . Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition) , 2013 , 25 ( 3 ): 292 - 299 .

NISSEL R , RUPP M . Doubly-selective MMSE channel estimation and ICI mitigation for OFDM systems [C ] // The 2015 IEEE International Conference on Communications,June 8-12,2015,London,UK . Piscataway:IEEE Press , 2015 : 4692 - 4697 .

ZUO H L , SONG H G , YUAN T P , et al . Channel modeling and estimation in high-speed mobile environment [C ] // The IEEE 83rd Vehicular Technology Conference,May 15-18,2016,Nanjing,China . Piscataway:IEEE Press , 2016 : 1 - 5 .

赖晓阳 , 朵琳 . OFDM 系统中一种实用的干扰抑制信道估计算法 [J ] . 电信科学 , 2016 , 32 ( 1 ): 88 - 92 .

LAI X Y , DUO L . Utility channel estimation algorithm with interference suppression in OFDM system [J ] . Telecommunication Science , 2016 , 32 ( 1 ): 88 - 92 .

KASHOOB M , ZAKHAROV Y . Data-aided iterative reweighted LMMSE channel estimation for MIMO OFDM [C ] // IEEE International Symposium on Signal Processing and Information Technology,December 7-10,2015,Abu Dhabi,UAE . Piscataway:IEEE Press , 2015 : 663 - 667 .

梁文莉 . 高速铁路环境下 OFDM 系统信道估计研究 [D ] . 兰州:兰州交通大学 , 2015 .

LIANG W L . Research on channel estimation of OFDM system in high-speed railway environment [D ] . Lanzhou:Lanzhou Jiaotong University , 2015 .

陈少平 . 时变信道中的正交频分复用系统 ICI 分析、消除与系统均衡 [D ] . 武汉:华中科技大学 , 2004 .

CHEN S P . ICI Analysis,cancellation,and equalization for OFDM sytems over time-varying channels [D ] . Wuhan:Huazhong University of Science and Technology , 2004 .

MUQUET B , COURVILLE M , DUHAMEL P . Subspace-based blind and semi-blind channel identification method for OFDM systems [J ] . IEEE Transactions on Signal processing , 2002 , 50 ( 7 ): 1699 - 1712 .

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