Octave script for plotting CIC+HBF transfer functions


#1

Hi,

as the Matlab script created by Firas needs the Filter toolbox, I have
created
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
first
sidelobe of the CIC filter falls into the passband of the HBF, so it is
quite
strong (only ~50dB attenuation). The new plot strengthens this.

Plots and script is available here:
http://www.kawo1.rwth-aachen.de/~lurchi/gnuradio/

Regards,

Stefan


Stefan Brüns / Bergstraße 21 / 52062 Aachen
phone: +49 241 53809034 mobile: +49 151 50412019