COFDM系统的符号定时同步算法  

Symbol Timing Recovery Algorithm for COFDM System

作　　者：艾渤[1] 刘刚[1] 葛建华[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,西安710071

出　　处：《高技术通讯》2002年第8期26-31,共6页Chinese High Technology Letters

基　　金：数字视频广播关键技术研究基金资助项目

摘　　要：通过对欧洲OFDM接收方案的分析 ,提出了一种易于FPGA实现的同步解决方案。结合计算机仿真和工程实现 ,提出了一种新的符号定时同步算法。该法克服了常规ML方法估计出的符号同步位置波动较大的缺点 ,弥补了门限估计方法中实际同步起始位置与估计位置相差大的不足 。A synchronization scheme, which is easy to be implemented with FPGA by analyzing the European OFDM receiving system, is presented. A new symbol timing recovery algorithm is also proposed with computer-simulation results. This method has advantages of a stable, accurate estimated synchronization position over ML method and Gate Estimation method, which has fluctuation of its estimated synchronization position and a big difference between the actual initial synchronization position and estimated initial position respectively.

关 键 词：HDTV COFDM ML方法 符号定量同步 高清晰度数字电视 多载波调制 算法 

分 类 号：TN941.3[电子电信—信号与信息处理]