基于PN序列的OFDM系统同步过程研究  

Synchronization Scheme Based on OFDM System in Wireless Channel

作　　者：李芳芳[1] 郑建宏[1] 

机构地区：[1]重庆邮电学院移动通信重点实验室,重庆400065

出　　处：《云南民族大学学报（自然科学版）》2005年第1期43-45,共3页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家科技部科研基金资助(编号:01C26215110971).

摘　　要：　OFDM技术作为一种适用于高速无线传输的调制技术近年来越来越受到关注,但其显著问题是对时频偏移十分敏感.提出一种基于PN序列的OFDM系统的同步过程,包括符号同步,载波同步和采样率同步.仿真结果证明这种同步体制具有较好的同步精度.The OFDM technique has recently gained increased interest as a modulation scheme for high-speed wireless transmission. However, The principal weakness of OFDM is its sensitivity to time and frequency offsets. In this paper, a synchronization scheme based on PN sequence was presented, include symbol synchronization,carrier synchronization and sample rate synchronization. The simulation results show that it has better synchronization precision.

关 键 词：OFDM系统 PN序列 符号同步 载波同步 频偏 OFDM技术 无线传输 仿真结果 高速 过程 

分 类 号：TN914[电子电信—通信与信息系统] TN911[电子电信—信息与通信工程]