本文把Lyon的BECM时钟定时准则运用到带通采样中,推导出了Godard带通采样时钟恢复算法,但基于的准则跟Godard不同,算法推导过程比Godard的推导过程简单。文中给出了基于Lyon的BECM准则推导带通采样时钟恢复算法的完整推导过程,对Lyon准则和Godard准则的同一性进行了讨论,并对Godard带通采样时钟恢复算法作了进一步说明,最后通过matlab仿真验证了Godard带通采样时钟恢复算法可以有效地跟踪采样时钟的频偏和相偏,快速实现带通信号采样时钟的恢复。
This paper derives Godard' s passband timing recovery algorithm based on Lyon' s BECM. The criterion which we used is different from Godard' s,and the deducing process is easier than Godard' s. We analysis the identicalness between the Lyon criterion and the Godard criterion. The simulation shows that this method is efficient to track out the frequency shift and the phase offset of the sampling clock and can recover the passband sampling clock quickly.