Timing signal based method and system thereof for improving clock precision

Abstract

The invention discloses a timing signal based method for improving the clock precision. The method comprises the following steps of: (A) receiving timing signals and extracting a section of continuous timing signals T from the received timing signals; (B) measuring the timing signals T through a clock signal output by an adjustable clock and calculating a corresponding synchronism deviation delta T; and (C) adjusting the frequency of the adjustable clock through the synchronism deviation delta T. The invention also provides a system for improving the clock precision on the basis of the timing signals. The invention effectively reduces the influence of errors in the timing signals on the clock precision and obviously improves the clock precision.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method and system for improving clock precision based on a timing signal. Background technique [0002] With the rapid development of communication technology, communication equipment has higher and higher requirements for time synchronization. Therefore, clock accuracy has become a key indicator to measure the performance of communication equipment. Such as figure 1 Shown is a schematic diagram of a model in which the timing source device 10 provides a clock to the timing device 30 through the communication network 20. Usually, the timing source device 10 generates timing signals with equal time intervals, and the timing signal is transmitted to the timing device 30 through the communication network 20 , the timed device 30 receives the timing signal and adjusts the frequency of the adjustable clock through the timing signal, and finally generates a clock signal with a...

AI Technical Summary

Problems solved by technology

However, when using the phase-locked loop 40 to correct the clock signal, the adjustable clock collects the real-time signal in real time, and uses the phase discrimination difference generated by the real-time signal to correct the subsequent clock signal. Since almost every signal has the above-mentioned three kinds of errors, Especially the known random error and the unknowable random error, so the obtained phase difference also bears a certain degree of random error, which is obviously not conducive to the correction of the clock signal in the subsequent link, and then affects the clock accuracy

In addition, if the timing signal is a second signal, it is difficult to provide a bandpass less than 1 Hz in the filter link 42, which further affects the clock accuracy

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