抖动jitter的分类

抖动jitter的分类

抖动jitter的分类

Depending on how the jitter timing is defined, jitter is classified into phase jitter, period jitter, and intercyclic jitter. Phase jitter is an accumulation of the difference between the ideal clock of the clock edge and the measured signal, and it is called long-term jitter or accumulated jitter depending in the case. Period jitter expresses the variation in a clock period and intercyclic jitter the variation in the difference between the periods of adjoining clocks.
根据抖动定时的定义方式,抖动分为相位抖动、周期抖动和循环间抖动。相位抖动是时钟边沿的理想时钟与被测信号之间的差值的累积,根据情况称为长期抖动或累积抖动。周期抖动表示相邻时钟周期之间的时钟周期和周期间抖动的变化。

拓展阅读:相位噪声对信号质量及稳定性的影响

在许多系统中,相位噪声是一项至关重要的参数。特别是在高性能雷达系统中,这个参数尤为关键,因为高性能雷达系统需要可靠地侦测来自目标的极微弱返回讯号。当相位噪声越低时,这些返回讯号的清晰度更高,侦测范围也相应增大。 对于数字系统而言,相位噪声的存在被视为抖动,并对系统性能产生直接影响。当相位噪声越低时,抖动程度降低,系统的稳定性和性能也相应提升。同样地,通讯系统将相位噪声视为对讯号带宽的一种影响,较低的相位噪声意味着更小的抖动,这进一步意味着更低的所需带宽,从而有助于优化通道宽度和节省资源。

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