A Novel Channel Estimation Algorithm Based on DFT for LTE-A System

WANG Ya-lin; ZHANG Yuan-yu; ZHU Yu-xia

doi:10.13756/j.gtxyj.2016.02.019

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A Novel Channel Estimation Algorithm Based on DFT for LTE-A System

更新时间：2022-06-28

- A Novel Channel Estimation Algorithm Based on DFT for LTE-A System
- Study on Optical communication Issue 2, Pages: 59-62(2016)
- 作者机构：
  
  1. 武汉邮电科学研究院
  2. 北京北方烽火科技有限公司
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2016.02.019
  CLC： TN929.5
- Published：2016，
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[1]王亚林,张元雨,朱宇霞.LTE-A中一种改进的基于DFT的信道估计算法[J].光通信研究,2016(02):59-62.

WANG Ya-lin, ZHANG Yuan-yu, ZHU Yu-xia. A Novel Channel Estimation Algorithm Based on DFT for LTE-A System. [J]. Study on Optical communication (2):59-62(2016)
[1]王亚林,张元雨,朱宇霞.LTE-A中一种改进的基于DFT的信道估计算法[J].光通信研究,2016(02):59-62. DOI： 10.13756/j.gtxyj.2016.02.019.

WANG Ya-lin, ZHANG Yuan-yu, ZHU Yu-xia. A Novel Channel Estimation Algorithm Based on DFT for LTE-A System. [J]. Study on Optical communication (2):59-62(2016) DOI： 10.13756/j.gtxyj.2016.02.019.

摘要

结合实际LTE-A（增强型长期演进）系统

研究了基于DFT（离散傅里叶变换）的信道估计算法

针对其存在的CIR（信道冲激响应）能量泄露问题

提出了一种改进的DFT算法

利用递推数列重构CIR

抑制噪声并减小能量损失

并将处理后的CFR（信道频域响应）抖动点用LS（最小二乘）结果进行替换

进一步抑制吉布斯现象。仿真结果表明

改进算法的性能优于LS和传统DFT算法。

Abstract

This paper studies DFT based channel estimation algorithm for practical LTE-A system.In order to solve the energy leakage problem of Channel Impulse Response（CIR）based on DFT channel estimation algorithm

a novel DFT based channel estimation method is proposed.The proposed method reconstructs the CIR by recurrence sequence in order to suppress the noise and reserve the CIR energy.The proposed method also replaces the jitter points of Channel Frequency Response（CFR）with the result of Least Square（LS）algorithm in the corresponding position to further suppress Gibbs phenomenon.Simulation results show the performance of proposed method is better than those of LS and classic DFT based algorithms.

关键词

增强型长期演进信道估计离散傅里叶变换能量泄露

Keywords

LTE-Achannel estimationDFTthe energy leakage

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