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Phase noise measuring method based on phase noise mathematical model

A phase noise, mathematical model technology, applied in noise figure or signal-to-noise ratio measurement, electrical digital data processing, special data processing applications, etc., can solve the problem of low accuracy of measurement results

Inactive Publication Date: 2016-04-20
XIDIAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a phase noise measurement method based on a phase noise mathematical model, aiming to solve the problem that the existing phase noise measurement method adopts the frequency response of the phase extraction circuit and the measurement result accuracy is low

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  • Phase noise measuring method based on phase noise mathematical model
  • Phase noise measuring method based on phase noise mathematical model

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Embodiment 1

[0119] In the present embodiment, the carrier frequency of the measured signal is 600MHz, and the power spectrum of the measured signal is measured with a spectrum analyzer AV4036F, and the phase noise of the measured signal is calculated according to the method of the present invention using the power spectrum data measured, and the phase noise is given measurement results. And the phase noise measurement result of the algorithm of the present invention is compared with the direct measurement result of the phase noise measurement module of AV4036F to illustrate the implementation process and effectiveness of the method of the present invention.

[0120] figure 2 The power spectrum curve of the measured signal measured by the spectrum analyzer AV4036F and the fitting result of the nonlinear least squares method are given using the measured data of the power spectrum. The phase noise coefficient of the measured signal obtained from the fitting result is:

[0121] ...

Embodiment 2

[0130] In the embodiment, the carrier frequency of the signal to be tested is 800MHz. The spectrum analyzer AV4036F is used to measure the power spectrum of the measured signal, and the measured power spectrum data is used to calculate the phase noise of the measured signal according to the method of the present invention, and the measurement result of the phase noise is given. The phase noise measurement result of the algorithm of the present invention is compared with the direct measurement result of the phase noise measurement module of AV4036F to illustrate the implementation process and effectiveness of the method of the present invention.

[0131] Figure 4 The power spectrum curve of the measured signal measured by the spectrum analyzer AV4036F and the fitting result of the nonlinear least squares method are given using the measured data of the power spectrum. The phase noise coefficient of the measured signal obtained from the fitting result is:

[0132] ...

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Abstract

The invention discloses a phase noise measuring method based on a phase noise mathematical model. The phase noise measuring method comprises the following steps: a power spectrum model of an oscillator signal is used for measuring data through a signal power spectrum, and a nonlinear least square method is adopted for curve fitting, so as to obtain a parameter in the power spectrum model; then, according to a relation between the signal power spectrum and a phase noise power law model, the obtained parameter is substituted into the phase noise power law model, so as to obtain a phase noise measuring result of the tested signal. Compared with the existing phase noise measuring method, the phase noise measuring method based on the phase noise mathematical model has the main advantage of avoiding the influence of a phase noise extraction circuit of hardware on the measuring performance.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, in particular to a phase noise measurement method based on a phase noise mathematical model. Background technique [0002] In modern electronic systems, the short-term frequency stability of the signal is an important factor to measure the quality of the signal, which directly affects the performance of the system, and the phase noise is an important indicator to describe the short-term frequency stability of the signal. Especially in radar, communication, navigation and other application fields, reducing phase noise has become one of the key technologies to improve system performance. For example, in Doppler radar, phase noise directly affects the radar's moving target detection performance; in digital communication, especially in phase modulation communication system, phase noise is of great significance to the system bit error rate and the isolation of adjacent channels . Ther...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01R29/26
CPCG01R29/26G06F30/00Y02E60/00
Inventor 陈晓龙詹劲松张丽荣任获荣文枫王家礼
Owner XIDIAN UNIV
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