The Frequency Tracking Loop for OFDM Systems Based on Pilot Symbols and Decision Data

ZHENG Lai-bo; HU Jian-dong

您当前的位置：

首页 >

文章列表页 >

The Frequency Tracking Loop for OFDM Systems Based on Pilot Symbols and Decision Data

更新时间：2025-07-16

- The Frequency Tracking Loop for OFDM Systems Based on Pilot Symbols and Decision Data
- Acta Electronica Sinica Vol. 34, Issue 1, Pages: 127-130(2006)
- 作者机构：
  
  1. 山东大学信息科学与工程学院,山东,济南,250100
  2. 北京邮电大学电信工程学院,北京,100876
  3. 山东大学信息科学与工程学院山东济南,250100
  4. 北京邮电大学电信工程学院北京,100876
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.7
- Published：2006
- 稿件说明：
移动端阅览
ZHENG Lai-bo, HU Jian-dong. The Frequency Tracking Loop for OFDM Systems Based on Pilot Symbols and Decision Data[J]. Acta Electronica Sinica, 2006, 34(1): 127-130.
DOI：

ZHENG Lai-bo, HU Jian-dong. The Frequency Tracking Loop for OFDM Systems Based on Pilot Symbols and Decision Data[J]. Acta Electronica Sinica, 2006, 34(1): 127-130. DOI：

摘要

在相干正交频分复用(OFDM)系统中为跟踪多径信道的实时变化通常在时频网格上插入导符号来进行信道估计.对利用这些导符号结合判决数据进行频率跟踪的算法作了进一步的研究.在时域和频域都重新推导了频偏的估计结果

经过合理近似

得到了时域最大似然估计的近似解;在频域推导了另一种形式的似然函数

得出了最大似然估计的解析表达式.新的频率跟踪算法降低了计算量

提高了频率同步的精确度.

Abstract

In coherent orthogonal frequency division multiplexing systems

the pilot symbols are often inserted into time-frequency grid to tracking the real time variation of the channel response.The frequency synchronization algorithm using these pilot symbols was further analyzed.By modifying the derivation procedures both in time domain and frequency domain

and by the proper approximation

the approximate maximum likelihood estimation result in time domain was derived.Meanwhile

a different form of likelihood function in frequency domain was derived

and the analytical estimation result was also given.The new tracking algorithm decreases the computational complexity greatly

and increases the accuracy of the frequency synchronization.

关键词

Keywords

references

Views

801

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Joint Blind Estimation of PN Codes and Channels with Maximum Likelihood for DSSS Signals in Multipath Channels

A Sensor Scheduling Method of LEO Constellation Based on Information Decision Tree

Two Line Elements Conversion and Passive Tracking of the Space Object in Space-Based Optical Surveillance

The Starting Point Problem of Parameters Estimation for LFM Signal Based on Newton's Method

Related Author

XU Man-kun

LI Tian-yun

LIU Qiu-hong

AN Wei

WANG Bo

CHENG Hong-wei

ZHANG Xiao-yun

GAO Qing-hua

Related Institution

Information Engineering University

College of Electronic Science and EngineeringNational University of Defense TechnologyChangshaHunan 410073China

Beijing Institute of Tracking and Telecommunications Technology

Beijing Institute of Tracking and Telecommunications TechnologyBeijing 100094China

College of Electronic Science and Engineering,National University,of Defense Technology

⁰