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Re: [Discuss-gnuradio] analysis_filterbank problem
From: |
Johnathan Corgan |
Subject: |
Re: [Discuss-gnuradio] analysis_filterbank problem |
Date: |
Wed, 7 Jan 2009 12:17:40 -0800 |
On Wed, Jan 7, 2009 at 11:03 AM, Sebastiaan Heunis <address@hidden> wrote:
> Regarding the halfband filter. I'm in the process of investigating
> ways of improving the response of the CIC or whichever technique I
> implement in the end. I've tried a 4 stage CIC with compensator as
> well as an 8 stage one. I get a nice flat passband in the end, but my
> supervisor wants at least 40dB of SNR by the time the signal is
> processed. I've only managed around 33. That's why I've been playing
> around with HBF/no HBF.
There is some Matlab code to calculate taps for a compensation filter
in the tree, that may perhaps be of use:
http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/utils/cic_comp_taps.m
-Johnathan