Forum: GNU Radio Octave script for plotting CIC+HBF transfer functions

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Stefan Bruens (Guest)
on 2009-03-25 02:38
(Received via mailing list)

as the Matlab script created by Firas needs the Filter toolbox, I have
an equivalent script for Octave.

Two differences:
It uses only 'freqz' for the computation of the transfer functions
For the baseband, also the images due to aliasing is plotted

I think, the second point gives some valuable information. Part of the
sidelobe of the CIC filter falls into the passband of the HBF, so it is
strong (only ~50dB attenuation). The new plot strengthens this.

Plots and script is available here:



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