How can I calculate frequency response model (or transfer function) from the experimental PSD only? if the system is fed by a white noise.

Hi,

I have to calculate the parametric frequency response model (or the transfer function) from the Power Spectral Density (PSD) provided by a data-sheet. The system is fed by the white noise, whose characteristics are also provided.

Answer 1

[Sainath Varikuti]

Hello Muhammad,

If Pyx is the output psd and Pxx is the white noise psd then the transfer function is the quotient of Pyx, the cross power spectral density of x and y, and Pxx, the power spectral density of white noise.

Refer to the following documentation page for more information: http://www.mathworks.com/help/signal/ref/tfestimate.html

Regards,

Sainath.