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Signal source stability measuring system and method

A measurement system and stability technology, applied in the field of signal processing, can solve the problem of low accuracy and achieve the effect of improving accuracy

Inactive Publication Date: 2017-06-30
JIANGHAN UNIVERSITY
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  • Claims
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Problems solved by technology

[0006] The present invention provides a signal source stability measurement system and method, which are used to solve the technical problem of low accuracy in the existing method of using the standard deviation of relative frequency offset fluctuations to measure the stability of the signal source

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  • Signal source stability measuring system and method
  • Signal source stability measuring system and method

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Embodiment 1

[0057] This embodiment provides a signal stability measurement system, please refer to figure 1 , the measurement system includes: a normalization processing module 101, a frequency measurement module 102 and a stability calculation module 103, wherein,

[0058] The normalization processing module 101 is used to obtain the frequency division value according to the reference frequency and the preset signal frequency that needs frequency division; obtain the sampling time signal according to the frequency division value; normalize the measured signal, Obtain standard 1MHz signal frequency;

[0059] The frequency measurement module 102 is configured to perform time-domain frequency measurement on the signal under test according to the time signal used to obtain a frequency value of the signal under test;

[0060] The stability calculation module 103 is used to perform Allan variance processing on the frequency value to obtain the frequency stability value of the measured signal;...

Embodiment 2

[0081] This embodiment provides a signal stability measurement method, please refer to Figure 7 , the method includes:

[0082] Step S101, obtaining the frequency division value according to the reference frequency and the preset signal frequency to be divided;

[0083] Step S102, obtaining a sampling time signal according to the frequency division value;

[0084] Step S103, normalize the measured signal to obtain a standard 1MHz signal frequency;

[0085] Step S104, performing time-domain frequency measurement on the signal under test according to the time signal, to obtain a frequency value of the signal under test;

[0086] Step S105, performing Allan variance processing on the frequency value to obtain the frequency stability value of the signal under test;

[0087] Step S106, performing linear fitting on the stability value to obtain a measurement result, so as to perform stability measurement on the measured signal.

[0088] In the above method, the frequency divisi...

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Abstract

The invention discloses a signal source stability measuring system characterized by comprising a normalization processing module, a frequency measurement module and a stability calculating module, wherein the normalization processing module is used for obtaining frequency division value according to reference frequency and preset signal frequency which needs frequency division, sampling time signals are obtained according to the frequency division value, detected signals are subjected to normalization processing operation, standard 1MHz signal frequency is obtained, the frequency measurement module is used for conducting time domain frequency measurement operation on the detected signals according to the sampling time signals, frequency value of the detected signals can be obtained, the stability calculating module is used for subjecting the frequency value to Allan variance processing operation, frequency stability value of the detected signals is obtained and subjected to linear fitting operation, a measurement result can be obtained, and stability measurement operation can be performed on the detected signals. The signal source stability measuring system and method can help solve a technical problem that a conventional method for measuring stability of a signal source based on standard variance which fluctuates relative to frequency offset is low in accuracy.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a signal source stability measurement system and method. Background technique [0002] The stability evaluation of signal source is an important aspect of time-frequency research work, which is widely used in signal processing. Generally speaking, the output frequency fluctuation of the whole machine caused by the noise of each component that makes up the signal source is ergodic, so it can be characterized by the variance in the stochastic statistical theory. [0003] In the prior art, the standard deviation of the relative frequency offset fluctuation is generally used to characterize the frequency stability of the signal source. Ruo Ling f 0 is the average frequency of the signal source, then within the sampling time τ, the relative frequency deviation of the output frequency is: [0004] However, the inventors of the present application have found through long-...

Claims

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Application Information

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IPC IPC(8): G01R23/02G01R23/16
CPCG01R23/02G01R23/16
Inventor 孙永波
Owner JIANGHAN UNIVERSITY
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