Spectral methods: Welch vs. Blackman Turkey, Which is better?

[RRapha]

Hello,

i have a question.

LabView uses to estimate the frequency response in SI-Toolkit a

correologram method (Blackman-Turkey).

Matlab uses with tfestimate() a periodogramm method (Welch)to

estimate the Frequency response.

Which is better? In some books i read that Welch method is even a little bit

better and faster.So why doesn´t LabView use the Welch method as well?

Does somebody know where I can find the entire ecuation for the

Welch method?

Thx for help

Regards,

Rapha

[Dippi]

Hi RRapha,

I only found out, that you can use the Welch.vi in Labview, too.
Take a look at the attached screenshot.

Best regards
Dippi