Method for extracting frequency and phase of input signal, and digital signal transmission system

Abstract

The present invention relates to the technical field of high-speed digital transmission systems, and in particular to a method for extracting the frequency and phase of an input signal, and a digital signal transmission system. The method for extracting the frequency and phase of an input signal comprises: a sending end inputs data; the data selectively passes through a conversion module and is converted into a corresponding signal by the conversion module; the signal is sent to a detection module of a receiving end and then is inputted to a phase-locked loop of the receiving end; and the phase-locked loop locks the frequency and phase of the data. In the method, an auxiliary clock or an independent clock signal is not needed, facilitating simplification of a method for extracting the frequency and phase of a signal; moreover, the method can achieve random locking, and the frequency range of input data is not limited, facilitating expansion of the application range of the method, and improving the flexibility of the method. The present invention further provides a digital signal transmission system which is used for implementing the method for extracting the frequency and phase of an input signal, and the digital signal transmission system has a simple structure and is beneficial to expanding the application range.

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