An Improved Symbol Synchronization Method for OFDM Systems

被引：0
|
作者：
Ke, Geng [1 ]
机构：
[1] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 210007, Jiangsu, Peoples R China
来源：
2014 FOURTH INTERNATIONAL CONFERENCE ON INSTRUMENTATION AND MEASUREMENT, COMPUTER, COMMUNICATION AND CONTROL (IMCCC) | 2014年
关键词：
OFDM; Symbol; Synchronization; Maximum likelihood; TIME;
D O I：
10.1109/IMCCC.2014.50
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
We present an improved symbol synchronization method based on maximum likelihood estimator for OFDM systems. The approach proposed here is an improvement of the previously proposed estimation method given by Van de Beek, Sandel and Borjesson (see IEEE Trans. on Signal Processing, vol. 45, no. 3, p. 1800-05, 1997). Our research indicates that the correlation coefficient in the ML estimator is the function of symbol synchronization position during the ergodic process to find the maximum of likelihood function and it should not be treated as a constant. Based on this observation, an improved calculation procedure for the ML estimator of symbol synchronization position is derived. The results from computer simulations and actual experiments show that the improved ML estimator of symbol synchronization position has better performance than the previous one.
引用
收藏
页码：207 / 210
页数：4
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