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[Discuss-gnuradio] Octave script for plotting CIC+HBF transfer functions
From: |
Stefan Bruens |
Subject: |
[Discuss-gnuradio] Octave script for plotting CIC+HBF transfer functions |
Date: |
Wed, 25 Mar 2009 01:36:27 +0100 |
User-agent: |
KMail/1.11.1 (Linux/2.6.27.7-9-mtrr_san; KDE/4.2.1; x86_64; ; ) |
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
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Stefan Bruens <=