基于2倍过采样的TDS-OFDM定时恢复算法  

Symbol Timing Recovery Method Based on 2-fold over Sampling in TDS-OFDM System

作　　者：肖静[1,2] 邹强[1,2] 符剑 潘长勇[1,2] 

机构地区：[1]清华大学清华信息科学与技术国家实验室 [2]清华大学微波与数字通信技术国家重点实验室,北京100084

出　　处：《电视技术》2010年第S1期18-21,共4页Video Engineering

摘　　要：提出了一种基于2倍过采样的TDS-OFDM定时恢复算法,与基于4倍过采样的算法相比,降低了接收机的工作频率和复杂度。在多种信道下的仿真结果表明,提出的算法与基于4倍过采样的算法性能相当,可直接应用于TDS-OFDM系统中。本算法已成功应用于电力线通信系统中,实现了在20 MHz带宽的电力线信道上传输上百兆的数据率。In this paper,a symbol timing recovery method based on 2-fold over sampling in the TDS-OFDM system is proposed.Compared with the algorithm based on 4-fold over sampling,it can reduce the receiver' s working frequency and complexity obviously.Simulation results over various multipath channels show that this algorithm has almost the same performance compared with the algorithm based on 4-fold over sampling,which facilitates its application in the TDS-OFDM system.The proposed algorithm is implemented in the PLC system,which can provide more than 100 Mbit/s payload rate on the 20 MHz bandwidth power-line channel.

关 键 词：TDS-OFDM 定时恢复 2倍过采样 高速电力线通信 

分 类 号：TN919.3[电子电信—通信与信息系统]