Re: [Discuss-gnuradio] analysis_filterbank problem

[Johnathan Corgan]

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