any example code for WVD spectrogram in labview ?

[MichaelMina]

I heve been trying to implement the WVD spectrogram in my vi with no luck. Can't find any examples on how to do it.

[Jeremy Braden]

I am not familar with the WVD spectrogram, and looking for an example has been tough. Is this a VI that comes with a toolkit? What does WVD mean?

[MichaelMina]

WVD Spectrogram is the Wigner-Ville distribution, it does not come in the base package, it computes the signal energy distribution in the joint-time frequency domain.

[WCR]

Mike M. (or other respondent), what is the difference between the WVD spectrogrm and the STFT spectrogram?

How many points are used in the WVD spectrogram, and how is it computed?  By Fourier transform or some other estimation procedure?

Thank you.

rosewc@udel.edu

[johnsold]

Look at the Functions palette >> Analyze >> Signal Processing >> Frequency Domain >> WVD Spectrogram.vi.

This is in LV 7.1.1 Full.

The WVD uses a different kernel than the Fourier transform and works well with rapidly changing signals. The major disadvantage is the large amount of spurious signal that appears in the spectrogram.

Lynn