The Research On Analysis And Decomposition Of Jitter Based On FFT

With the continuous development of communication technology and the increasing amount of information, the application of high-speed serial bus has become main stream of high-speed communications technology. Jitter plays an important role in affecting the performance of serial system; therefore, the research on jitter is an important issue of modern communication technology.Jitter is caused by a variety of reasons, and thus the components of jitter are varied. Analysis and decomposition of jitter components can not only quickly estimate the bit error rate and observe the system performance, but help designers finding the sources of jitter, thereby reducing or eliminating jitter, optimizing the system. Basing on the analysis of existing jitter decomposition methods ,this article designed a set ofVC-based jitter decomposition algorithms ,which can separate varied jitter components from clock and data precisely. The emphasis is put on the time-frequency domain decomposition module, including the procedure, the principle and the corresponding key technologies of time-frequency domain algorithms.The jitter decomposition algorithms given in this paper have undergone the stage of overall debug, and realize the precise decomposition of jitter components.