OFDM系统采样时钟同步算法  

Sampling clock synchronization algorithm for OFDM system

作　　者：张红[1] 赵翌[1] 

机构地区：[1]桂林师范高等专科学校,广西桂林541001

出　　处：《现代电子技术》2013年第5期87-90,共4页Modern Electronics Technique

基　　金：广西壮族自治区教育厅立项项目(201204LX499)

摘　　要：提供一种精度高,算法简单,开销小的OFDM系统采样时钟同步算法,该算法采用一种基于精细频率估计的方法估计采样时钟频谱偏差,然后运用改进的Farrow滤波器实现信号采样率的转换,纠正采样时钟频率偏差,对于残留采样时钟偏差导致的相位偏转,使用相位补偿对其进行纠正。经过仿真和分析发现使用该算法可完全克服采样时钟频率偏差对OFDM系统造成的影响,达到高精度采样时钟同步。The paper presents a high precision and simple sampling clock synchronization algorithm with little overhead for OFDM system. The algorithm based on fine frequency estimation method estimates the sampling clock frequency spectrum bias, and then the improved Farrow filter converts the signal sampling rate to correct the deviation of the sampling clock frequency, and correct deflection of the phase due to the residual sampling clock skew using phase compensation. The simulation and analy- sis results show that the proposed algorithm can completely overcome the impact of the sampling clock frequency deviation on OFDM system and achieve high-precicion sampling clock synchronization.

关 键 词：时钟同步采样 精细频率估计 频率校正 滤波器 

分 类 号：TN911.34[电子电信—通信与信息系统]