Signal generator and offline analysis Second question.

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Seung-Chan Lee
Posts: 10
Joined: 16 Jul 2010, 09:08

Signal generator and offline analysis Second question.

Post by Seung-Chan Lee » 19 Jul 2010, 10:22

Hello. all. :o

Thank you for your reponse about previous question.
I have a second question about offline analysis.

Following the reply, I am NOT used CAR spatial filter.
So, I almost solved that problem.

This is CAR filter ON result.
Image

And, This is CAR filter OFF result.
Image

Using CAR filter OFF, other channel R2 values are lower than previous result.
But, even if I used only 10Hz frequency signal generator, 0-8Hz R2 values looks like still high. I think 0-8Hz R2 values have to be lower.
Why is that?

Thank you for response in advance.

gschalk
Posts: 615
Joined: 28 Jan 2003, 12:37

r^2

Post by gschalk » 19 Jul 2010, 20:01

Did you add some noise to the sine waves? The AR spectral estimator has problems with pure sine waves.

Gerv

Seung-Chan Lee
Posts: 10
Joined: 16 Jul 2010, 09:08

Post by Seung-Chan Lee » 20 Jul 2010, 00:27

Yes. I add a noise.
Here is signal generator parameters.
Adding noise level is 30muV.
But, I still think that the 0-8Hz R2 values must be lower.
Why is that?

Image

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