Sebastian: http://users.snip.net/~donadio/cic.pdf
contains more than you ever wanted to know about CIC filters in great detail including how to calculate the transfer function. Bob ARRL SDR Working Group Chair Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. "Trample the slow .... Hurdle the dead" -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Padalino Sent: Wednesday, July 16, 2008 3:12 PM To: Sebastiaan Heunis Cc: [email protected] Subject: Re: [Discuss-gnuradio] Decimation scheme On Wed, Jul 16, 2008 at 2:46 PM, Sebastiaan Heunis <[EMAIL PROTECTED]> wrote: > Hi > > Can anyone please help me with some information on the CIC filters in > the USRP? I need to know how many CIC stages there are, what the > cutoff frequency and out of band rejection is and how the decimation > is performed after filtering. Which .v files should I have a look at? The decimating CIC filter implementation can be found here: http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/cic_decim. v It's a 4-stage CIC filter. Decimation is somewhat inherent within the process, so I don't understand that question. Sorry. Good luck. Brian _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
