noisin

Estimates the amplitude, frequency, and DC offset of a sampled noisy sinusoid.

Description

MATLAB function to estimate the amplitude, frequency, and DC offset of a sampled noisy sinusoid. Choice of RMS or spectral methods available for amplitude estimation, with a decision guide.

Usage:

[Amplitude,Frequency,DC] = noisin(data vector,sampling rate,'method')

Note: Accuracy and generality, rather than efficiency, are emphasized in noisin.m.

Type help noisin for more info.
Check back often for bugfixes and improvements. Comments and feedback are welcome. Please report any problems or requests to the author.

• MATLAB release: MATLAB 6.5 (R13)

[Ethan Mendelssohn]

After the last update and bugfix, performs brilliantly. Estimates are very accurate.

Should report any problems or requests to the author.

[John Rinderknecht]

This function was not able to determine the correct frequency of my signal. I'm not sure why, because the noise was not that strong. However, there are other non-idealities in my signal that this function may not be able to handle.

[Hazem Baqaen]

John, did you give it a modulated signal? if so, the function cannot accurately determine the dominant frequency, as is made clear in the help file. The function is intended for noisy sinuoids or combinations thereof.