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Maximum time interval error measurement method

A technology of interval error and maximum time, which is applied in the direction of error detection/prevention using signal quality detectors, time division multiplexing systems, electrical components, etc., can solve problems such as high measurement cost and cumbersome measurement process, and achieve reduction The effect of calculation times and reducing time complexity

Inactive Publication Date: 2019-02-26
电信科学技术第五研究所有限公司
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Problems solved by technology

The measurement process is cumbersome and the measurement cost is high. It is difficult to measure the MTIE indicators of the time and frequency equipment in the synchronization network in real time with portable measuring instruments based on embedded platforms.

Method used

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Embodiment Construction

[0021] refer to figure 1 , 2 , provide the measurement method of maximum time interval error of the present invention, this method comprises:

[0022] The frequency signal in the external clock reference is connected to the rubidium clock control module, and the rubidium clock control module passes the phase detector according to the input frequency signal and the frequency signal output by the rubidium clock to obtain the frequency signal in the external clock reference signal and the rubidium clock The phase difference of the output frequency signal, the rubidium clock control module uses the phase difference to use the PID controller to tame the rubidium clock, so as to form a closed-loop rubidium clock controller, so that the rubidium clock outputs a stable 10MHz frequency signal, and the rubidium clock outputs 10MHz The frequency signal is connected to the core time module to provide a stable frequency source. At the same time, the time signal in the external clock refe...

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Abstract

The present invention provides a maximum time interval error measurement method, and relates to the technical field of synchronous network communication. The method comprises the following steps of: 1) in the time interval error series, taking a sliding window with a length of n as an observation window; 2) calculating and recording the maximum value of each data in the observation window, a series position where the maximum value is located, the minimum value, a series position where the minimum value is located and absolute value of the difference of the maximum value and the minimum value,wherein the absolute value is called ppk; 3) sliding the observation window backwards once, performing calculation and recording; 4) repeating the step 3) until the last bit of the error series entersthe observation window; 5) taking the maximum value of the ppk value obtained through calculation each time as a peak-peak value corresponding to the length of the observation window; 6) adding the length of the observation window, repeating the steps 2)-5), and recording a peak-peak value corresponding to the length of the observation; and 7) repeating the step 6) until the length of the observation window reaches a preset length. The number of calculation times is reduced while ensuring the maximum time interval error curve completion.

Description

technical field [0001] The invention relates to the technical field of synchronous network communication, in particular to a method for measuring the maximum time interval error. Background technique [0002] In the field of measurement and control systems and synchronous network communications, a time and frequency server is often required to provide timing and synchronization time scale signals for equipment. There are many evaluation parameters for the time-frequency stability of the time-scale signal, among which the maximum time interval error (MTIE) is an important index for evaluating the long-term stability of the time-scale signal. The estimation of MTIE is based on the time error measurement data between the reference clock and the measured clock. It includes two parts, one is the collection of time error (TE) sample data, and the other is the calculation and processing of TE sample data. MTIE The quality of the calculation method will directly affect the confiden...

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Application Information

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IPC IPC(8): H04L1/20H04J3/14
CPCH04J3/14H04L1/20
Inventor 李科楚鹰军王茂凌
Owner 电信科学技术第五研究所有限公司
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