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Method and system for detecting phase noise

A phase noise and detection method technology, applied in the phase angle between voltage and current, measuring device, measuring electrical variables, etc. The system is simple, meets the test requirements, and is convenient for popularization and application.

Inactive Publication Date: 2009-10-07
沈明
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] In order to solve the problems that phase noise is difficult to detect, and the detection accuracy is not high and it is not easy to realize automation, the present invention provides a phase noise detection method, the method comprising:

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  • Method and system for detecting phase noise
  • Method and system for detecting phase noise

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Embodiment Construction

[0051] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0052] see figure 1 , the embodiment of the present invention provides a phase noise detection method, comprising the following steps:

[0053] Step 101: input test information, and set detection parameters, filter parameters and amplification factors of operational amplifiers;

[0054] The test information includes the type and frequency of the signal source under test; the detection parameters include the measurement frequency range and smoothing selectivity; the filter parameters include high-pass filter parameters and low-pass filter parameters; the operational amplifier includes high-frequency operational amplifiers and low-frequency operational amplifiers; In practical applications, the measurement frequency range can be set to ...

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Abstract

The present invention discloses a method and system for detecting phase noise belongs to electronic measurement technology field. The method includes: according to frequency of a signal source to be measured and measuring frequency range to choose corresponding phase-looked loop circuit; the phase-looked loop circuit tracking phase-locked the signal source to be measured; checking the phase-looked tracking is completed or not, if yes, then collecting the amplified phase noise signal outputted by the phase-looked loop circuit; transforming the phase noise signal into frequency domain signal and proceeding logarithm processing and scaling processing to the frequency domain signal, then drawing a phase noise graph according to the results of the logarithm processing and the scaling processing. The system includes a selection module, a phase-locked module, a checking collection module and a processing module. The invention provided method of detecting phase noise is easy to implement, and the supporting hardware system is simple, which is convenient to spread and use.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a phase noise detection method and system. Background technique [0002] With the development of science and technology, systems such as communication, radar, and high-speed data transmission require highly stable signals as baseband information carriers. The baseband information carrier is usually a sine wave, and the three elements of the sine wave include amplitude, frequency and phase. Usually, the phase stability index is expressed by phase noise, which is an important parameter to measure signal stability. At present, information transmission is mostly modulated on the carrier phase or frequency related to the phase, and the phase noise index of the baseband signal is the bottom line of the overall system. With the improvement of the performance requirements of electronic products, the requirements for the performance of the signal source and frequency sour...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R25/00
Inventor 沈明
Owner 沈明
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