基于DTMB标准多载波模式的定时同步算法研究  

Study on Timing Synchronization Based on Multi-carrier Mode of DTMB

作　　者：邱雪霞[1] 郭里婷[1] 

机构地区：[1]福州大学福建省数字电视工程研究中心,福建福州350002

出　　处：《电视技术》2011年第23期1-4,共4页Video Engineering

基　　金：福建省自然科学基金项目(2009J05144)

摘　　要：提出一种基于地面数字电视国家标准(DTMB)的定时同步算法。该算法结合帧头模式检测、帧头位置粗估计和帧头相位捕获完成定时同步。其中帧头模式检测和帧头位置粗估计不受多径、大频偏影响,可抗大采样偏差。同时估计的帧头位置可减小相关运算量,从而迅速捕获到帧头相位进入定时恢复环路。理论分析和仿真结果证明该算法具有更好的性能。In this paper, a timing synchronization algorithm based on DTMB standard is proposed. The algorithm combines header mode detection, header position coarse estimation and header phase acquisition to complete timing synchronization. In this system, header mode detection and header po- sition coarse estimation can resist large frequency offset, large sampling bias and multi-path, while the estimated position can reduce the correlation computation and quickly acquires header phase into the timing recovery loop. Theoretical analysis and simulation results show that this algorithm has better performance.

关 键 词：帧头模式检测 帧头位置粗估计 帧头相位捕获 定时恢复 

分 类 号：TN943[电子电信—信号与信息处理]