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PSD estimate through Welch's method
http://openvibe.inria.fr/forum/viewtopic.php?f=3&t=9631
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Author:  don_matti [ Mon Apr 25, 2016 8:46 pm ]
Post subject:  PSD estimate through Welch's method

Hello,

Just wondering if anyone would benefit from Power Spectral Density estimation in OpenViBE.

I have found yet option with Welch windowing in Connectivity Measure box, but it is not the same imho. So far, OpenViBE supports FFT - Power Spectral Analysis and it could be more extended by mentioned algorithm.

Here's some useful links about this method:
http://www.mathworks.com/help/signal/ref/pwelch.html,
https://en.wikipedia.org/wiki/Welch's_method.

Thanks in advance for response!

Cheers,
Matt

Author:  Jeff_B [ Tue Apr 26, 2016 3:41 pm ]
Post subject:  Re: PSD estimate through Welch's method

Hi Matt,
I had the same idea while using the itpp library for the SpecCSP algorithm :) the Welch estimator is already implemented (see ITPP_EXPORT vec itpp::spectrum() at http://itpp.sourceforge.net/4.3.1/group__sigproc.html), and some other PSD estimators could also be among the options of such a box:
- like autoregressive Yule-Walker estimation (thanks to itpp::yulewalk for exemple).
- like Burg estimator (see in OV: ovpCAlgorithmARBurgMethod)
Jeff

Author:  elcinobacone [ Wed May 18, 2016 10:00 am ]
Post subject:  Re: PSD estimate through Welch's method

Hi, we have a small group of neuroscience researchers and We would to know how calculate DSP signal about beta e theta bands. We're making an algorithm on OpenVibe designer but We don't know how integrate the function " ITPP_EXPORT vec itpp::spectrum()" implementing Welch method . We are not a programmers ...Can you help us?

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