利用分数抽头均衡器快速定时同步  

Fast Timing Recovery with Fractional Tap-spacing Equalizer

作　　者：黄炳刚[1] 周志杰[2] 郑翔[2] 惠毅[1] 

机构地区：[1]解放军理工大学通信工程学院研究生4队,江苏南京210007 [2]解放军理工大学通信工程学院电信工程系

出　　处：《军事通信技术》2008年第2期51-55,共5页Journal of Military Communications Technology

摘　　要：建立了分数抽头均衡器(FSE)与定时同步相结合的信号模型,分析了定时误差对于均衡性能的影响,提出了一种新的基于FSE的快速定时同步算法。在未知参考序列相位的情况下,利用循环均衡快速收敛并建立同步。在相位跟踪阶段,利用抽头增益跟踪定时相位误差,通过对采样数据进行抽取或插值以及均衡器抽头的移位操作控制相位误差。仿真表明,该算法能在长度为均衡器抽头数的符号周期内快速建立同步,通过采样率的选择可以精确地控制定时相位误差。A signal model was presented by combining fractional tap-spacing equalizer and timing recovery.A new fast timing recovery algorithm based on FSE was proposed based on the analysis of performance of equalizer with timing error.Without knowing the reference sequence phase,fast convergence and synchronization were achieved by using cyclic equalization.The proposed algorithm traced the timing phase error using the tap gains,and then adjusted the phase error by sampling or inserting the over-sampled data and shifting the tap gains.Simulation results show that the system can get synchronization with a period of symbols equal to the number of equalizer taps and the timing phase error can be controlled accurately by over-sampling rate.

关 键 词：循环均衡 分数抽头均衡器 过采样 定时同步 

分 类 号：TN7[电子电信—电路与系统]