一种TDS-OFDM接收机的定时同步算法  

Symbol Timing Recovery Algorithm for TDS-OFDM Receiver

作　　者：王显煜[1] 邹辉[1] 赵芳蕾[1] 尚文静[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071

出　　处：《电视技术》2007年第11期31-34,共4页Video Engineering

基　　金：国家自然科学基金重点项目(60332030);国家自然科学基金重大项目(60496316)

摘　　要：提出了TDS-OFDM接收机中一种结合PN序列相位捕获的定时同步算法。利用本地PN与接收数据的相关特性,通过相关峰值检测快速提取定时误差信息完成定时同步,并且提出了能纠正较大采样偏移的小数因子补偿结构。仿真表明该算法在保证较好的同步性能前提下,能对抗较大的采样偏和残留频偏。Based on the characteristics of correlation between PN sequences and received signals,a new method which combines code acquisition and symbol timing recovery for TDS-OFDM receiver is developed. Searching and tracking of the correlation peaks of the PN sequences embedded in the signals is used to detect the timing error information to achieve the timing recovery. And a method compensating decimal interval to resist against larger timing error is proposed. Simulation results show that this method provides better synchronization performance, and can resist against larger sampling offsets and residual frequency offsets.

关 键 词：PN序列 定时误差 TDS—OFDM系统 

分 类 号：TN911[电子电信—通信与信息系统]