| 一种OFDM定时同步与载波频偏估计算法 |
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| 引用本文： | 黄慧,程鹏,张朝阳,仇佩亮.一种OFDM定时同步与载波频偏估计算法[J].电路与系统学报,2009,14(2). |
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| 作者姓名： | 黄慧 程鹏 张朝阳 仇佩亮 |
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| 作者单位： | 浙江大学,信息与电子工程学系,浙江,杭州,310027 |
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| 基金项目： | 浙江省自然科学基金重点项目，浙江省科技计划项目，国家自然科学基金 |
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| 摘 要： | 本文提出一个有效的利用周期性前导字的OFDM定时同步与频偏估计算法.算法分为两个步骤,首先根据前导字的特殊结构对Schmidl&Cox算法进行改进,将Schmidl&Cox算法中平台的检测变成单个峰值的检测,并由单峰的位置和复值可同时准确地估计符号定时和分数倍频偏;然后提出"相位差分序列",利用该序列的相关性对整数倍频偏进行估计.文中针对AWGN信道和SUI信道对算法进行了仿真,结果表明本文算法较其它算法具有更好的估计性能和鲁棒性.
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| 关 键 词： | 前导字 定时频偏估计 |
A timing and frequency estimation algorithm for OFDM |
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| HUANG Hui,CHENG Peng,ZHANG Zhao-yang,QIU Pei-liang.A timing and frequency estimation algorithm for OFDM[J].Journal of Circuits and Systems,2009,14(2). |
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| Authors: | HUANG Hui CHENG Peng ZHANG Zhao-yang QIU Pei-liang |
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| Affiliation: | HUANG Hui,CHENG Peng,ZHANG Zhao-yang,QIU Pei-liang(Department of Information Science &Electronics Engineering,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | Robust timing and frequency synchronization in OFDM systems is addressed in this paper.First,an improved synchronization algorithm is presented,which converts the plateau in the traditional Schmidl&Cox algorithm into a single peak,and the position of the peak can be used to simultaneously estimate symbol timing and fractional frequency offset.Then,an integer frequency offset estimation algorithm using the differentiated sequence of the preamble is proposed,which is robust to the remaining timing offset.The ... |
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| Keywords: | OFDM |
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