一种全数字时基恢复的算法与实现  

An Algorithm and Realization of Timing Recovery in Full Digital Domain

作　　者：刘冀[1] 孙玲[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]石家庄供电公司科技信息部,河北石家庄050081

出　　处：《计算机与网络》2010年第14期60-62,共3页Computer & Network

摘　　要：数字时基恢复与调整采样时钟相比,具有一定的优势。在参考文献的基础上,结合工作经验,提出了内插滤波器的分级设计理念,以一定的设计复杂度换取较高的内插性能;同时,挑选了较好的二级滤波器设计结构,总结了使用数控振荡器(NCO)求解内插时基的方法,归纳了恢复高性能符号钟所需的提纯方法;最后,给出了仿真结果、占用的硬件资源的统计和系统的处理能力,达到了较好的效果。Timing recovery in full digital domain has some superiority comparing with mining the sample clock. Based on references and combining with experiences, this paper puts forward the concept of hierarchical design of interpolation filter, using some complexity in design to obtain higher interpolation performance. And it describes the better design structure of falter in the second grade, summarizes the computation method of solving the interpolation timing with numerical controlled oscillator （NCO） and concludes the purification method of symbol clock with high performance. At the end, it outlines the simulation result, the amount of hardware resource and the processing ability of the system, which all indicate better effect.

关 键 词：数字接收机 内插 多相滤波器 分级设计 数控振荡器 

分 类 号：TN851[电子电信—信息与通信工程]