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.