一种基于rob/stuff机制的OFDM系统抽样时钟同步算法  

Sampling Clock Synchronization Algorithm for OFDM System Based on Rob/Stuff

作　　者：柯峰[1] 冯穗力[1] 耿恒信[1] 

机构地区：[1]华南理工大学电子与信息学院,广州510641

出　　处：《科学技术与工程》2008年第16期4492-4495,4499,共5页Science Technology and Engineering

基　　金：国家自然科学基金(69972015);广东省自然科学基金博士启动基金(06300097)资助

摘　　要：讨论了抽样时钟偏差对正交频分复用系统(OFDM)系统的影响,提出了一种基于rob/stuff机制的OFDM系统抽样时钟同步算法,与子载波相位偏转补偿模块相结合,可以消除抽样时钟频率偏差造成的OFDM符号子载波相位偏转的影响,同时能够避免符号同步模块对FFT窗口的频繁搜寻造成系统性能的下降。The effects of the sampling clock synchronization errors for OFDM system are discussed and propose a sampling clock synchronizaiton algorithm for OFDM system based on rob/stuff.The proposed algorithm can cancel the influence of the phase rotation of the subcarriers of the OFDM symbol due to sampling clock frequency offset combined with phase rotation compensating and avoid the performance degradation caused by the frequent FFT window searching of the symbol synchronization module at the same time.

关 键 词：正交频分复用 抽样时钟 同步 

分 类 号：TN929.5[电子电信—通信与信息系统]