北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (3): 72-74.doi: 10.13190/jbupt.200503.72.zhengk

• 论文 • 上一篇    下一篇

一种上行OFDMCDMA系统的时频同步算法

郑侃,黄琳,陈茅茅,王文博   

  1. 北京邮电大学 无线信号处理与网络实验室, 北京 100876
  • 出版日期:2005-06-28 发布日期:2005-06-28

Uplink Time and Frequency Synchronization Algorithm in OFDMCDMA Systems

ZHENG Kan,HUANG Lin,CHEN Maomao,WANG Wenbo   

  1. Wireless Signal Processing and Network Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Online:2005-06-28 Published:2005-06-28

摘要:

提出了一种适用于上行正交频分复用码分多址接入(OFDMCDMA)系统的简单定时和频率同步方法. 在该方法中,首先通过利用各自在频域和码域上正交训练序列的相关性来完成多用户符号定时估计;然后利用最大似然原则得到频偏估计. 仿真结果表明了该算法具有优良的最小均方误差性能.

关键词: 正交频分复用, 码分多址接入, 上行同步

Abstract:

A simple timing and frequency synchronization method for the uplink orthogonal frequency division multiplexing code division multiple access (OFDMCDMA)was proposed, where the multi-user symbol timing was achieved by making use of good correlation property of training sequences that are distinguished not only in frequency domain but in code domain. Also the frequency offset was estimated based on maximum likelihood (ML) principle. Simulation result shows that the mean square error (MSE) performance of the proposed estimation algorithm is satisfied.

Key words: orthogonal frequency division multiplexing, code division multiple access, uplink synchronization

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