Method and system for determining parameters of sinusoidal signals

摘要

At least one parameter of a signal is determined, wherein the signal is a sinusoidal signal including noise, wherein the parameter includes at least one of a frequency of the signal, and an angle of a phase of the signal. The frequency of the signal is determined iteratively based on a linear relationship among the frequency of the signal, samples of the noise, and samples of the signal using a statistical correlation among the samples of the noise. During a current iteration the statistical correlation is updated based on the frequency of the signal determined during a previous iteration, and the samples of the signal are updated with values of the signal during a current period of time.

主权项

1. A method for determining at least one parameter of a signal, using a suitably programmed processor, wherein the signal is a sinusoidal signal including noise, wherein the parameter includes at least one of a frequency of the signal at an instant of time, and an angle of a phase of the signal at the instant of time, comprising steps of:
producing, using a discrete oscillator, one or more discrete samples of the signal for each period of time; and determining iteratively the parameter of the signal based on a linear relationship among the frequency of the signal, samples of the noise, and the samples of the signal using a statistical correlation among the samples of the noise, wherein a current iteration includes:
updating the statistical correlation based on the frequency of the signal determined, during a previous iteration; andupdating the samples of the signal with values of the signal during a current period of time.