Method and system for generating phase noise with adjustable size by using specific frequency offset point

Abstract

The invention belongs to the technical field of electronic measurement, and discloses a phase noise generation method and system capable of regulating and controlling the size by using a specific frequency offset point, and the method comprises the steps: building a linear equation set through a phase noise power law model and carrier frequency offset point data; fitting the equation set through a minimum norm and least square solution method to obtain a noise component coefficient of each frequency band in the power law model; the coefficient obtained through fitting is combined with a forming filter to obtain a power law model closest to specified data, the phase noise is controlled to be dynamically adjustable through the coefficient, and the power regulation and control range is 5 dBm to 70 dBm. According to the method, the data of the frequency points at the five special positions are subjected to least square fitting of the minimum norm, so that the difficulty in setting the noise component coefficient by a user is avoided. Meanwhile, fitting of the noise component coefficients starts from the whole power-law model, and the situation that the noise component coefficients are solved by decomposing the power-law model to destroy overall characteristics in the past is avoided.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, and in particular relates to a method and system for generating phase noise whose magnitude can be adjusted by using a specific frequency offset point. Background technique [0002] At present, with the development of electronic information technology, the stability of the transmission carrier required in the fields of communication, radar or high-speed transmission is getting higher and higher, that is, higher quality signal sources are required. The technology of the invention is applied to a vector modulation signal source, which can make it have the function of generating a signal output with adjustable phase noise, and is mainly oriented to two aspects of application. The first is to calibrate phase noise measuring instruments. At present, domestic calibration of phase noise analyzers is mainly achieved by comparing with imported instruments. There is a lack of signal sources ...

AI Technical Summary

Problems solved by technology

[0006] (1) At present, domestic calibration of phase noise analyzers is mainly achieved by comparison with imported instruments, lack of signal sources for calibration of phase noise test instruments, and are easily affected by foreign embargoes

[0007] (2) The existing signal source lacks the function of quantitatively generating phase noise, making the influence of phase noise on the signal uncontrollable

[0008] (3) In the existing phase noise model, there is no accurate correlation between the noise component coefficient and the amplitude of the frequency offset point, which makes it difficult for users to generate phase noise through quantitative parameters

[0009] The difficulty of solving the above problems and defects is: the original phase noise model is relatively complicated, the calculation amount is large, and it is difficult to realize in hardware instruments

The quantitative control of phase noise by using the phase noise component coefficient is not accurate enough, which affects the accuracy of the results

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