Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

I was looking for a more efficient way of finding the magnitude and phase of a signal at a certain frequency without performing an FFT because it produces more information than I need and I came across this comment on the Matlab message board:

http://www.mathworks.com/matlabcentral/newsreader/view_original/250421.

If I am sampling at 1500Hz and my signal is 100 points and I am looking for the phase and magnitude at 15Hz, would this be suitable method for obtaining the information I need? Also, why does the OP suggest windowing the signal as well?

share|improve this question

1 Answer 1

up vote 1 down vote accepted

You might want to check the Goertzel algorithm: http://en.wikipedia.org/wiki/Goertzel_algorithm It is actually part of the matlab signal processing toolbox.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.