位同步信号恢复的数字电路实现

Realization of Bit Synchronous Signal Recovery Digital Circuits

本文扼要阐述位同步信号恢复的一般原理，进而提出采用数字集成电路器件实现位同步信号提取的方案。对所述方案分析结果表明，若以符号速率处的离散频谱功率与其邻近的连续频谱功率之比作为衡量位定时恢复好坏的标准，那么，此功率之比只取决于窄带带通滤波器的品质因数Ｑ。与其它位定时恢复电路相比，文中所述方案具有造价低、实现简单、调试方便等优点。

This paper briefly explains the general priciples of bit synchronous signal recovery, and then puts forward thesolution of bit synchronous signals abstraction by utilizing digital integrated circuit components; The analysis of the solutionindicates that,if the ratio of the discrete frequency spectrum power rate at the sign rate to the nearby continuous frequencyspotrum power rate is used as the criterion to judge the quality of bit timing recovery,then this ratio depends only on thequality factor Q of the narrow band pass filter.compared with other bit timing recovery circuits,the solution described herehas the advantages of low in cost,simple to realize and easy to test。