Signal Transmission Characteristics Of High-speed Communication System And Its Jitter And Noise Analysis

As transmission rate of the high-speed communication systems is increasing, the signal frequency is climbing high. The impact that transmission line parameters has on the signal, the jitter and noise on the printed circuit board become more prominent, so the traditional electronic design methods and the classic transmission line theory is no longer applicable to high-speed highly integrated electronic systems.By using theory of signal integrity, analysis of high-speed communication system transmission line characteristics, noise and jitter is of great significance. First, the effect that non-ideal transmission lines have on the signal is explored from three aspects of conductor, dielectric and the return path; Surface roughness model of conductor is made and its AC resistance, electrical resistance is accurately calculated; Based on frequency-dependent infinite pole model of dielectric, the impact that the fiber interwoven structure fiber has on specific length differential transmission line convert mode is explored; How the division slot of the plane bring signal attenuation and current crosstalk problems is studied, and corresponding solutions given.Then study the serial and parallel interface signal jitter and noise problems. Based on actual project, probability and statistics analysis method and the dual-Dirac model are introduced, to avoid pessimistic estimate of the maximum distortion analysis, the DDR3jitter reasonable probability distribution is given in the pre-simulation, and Q transform tail fit used in the post-simulation to guarantee accuracy of distribution function. Timing analysis of DDR3is researched, a whole high-speed design process also is completed including analysis of jitter, noise, timing budget and after verification.A lossless transmission line circuit model is built, which show that the parasitic parameters of the channel signal cause voltage difference and signal jitter. An equivalent noise model is introduced to explore the mechanisms of inter-symbol interference for high-speed serial communication link, the discrete interference timing amount is integrated as an amplitude noise value, which provides a new evaluation perspective; In accordance with the inter-symbol interference probability distribution, equivalent voltage noise is estimated for an instance of communication link with equalization, combined with the ANSYS Designer modeling for high-speed serial system, the comparative analysis of the inter-symbol interference elimination for various equalizers is made from several aspects, and a new equivalent voltage noise evaluation for inter-symbol interference is provided. Based on statistical methods, a response surface model is built for a lOGbps differential link, reasonable prediction for signal quality within the range of parameter fluctuations and electrical properties disturbance is made by using statistical software JMP, and the best and worst combination of parameters can be effectively predicted. In this thesis, the research on the reliability of the communication system design has a certain theoretical significance and application value.