On Sat, Mar 17, 2007 at 08:00:59AM -0700, Mike Garcia wrote: > > Thanks Eric. That makes sense. I'm still learning about gnuradio so excuse > my naivete. Could the distortion be cause by the CIC filters? I understand a > CIC filter needs some amount of bit growth. If the LSBs are truncated > instead, then that amounts to adding noise to the system. This may be > unavoidable but might explain the distortion you're seeing. > > Mike
I don't think it's a problem in the CIC. They have enough width to accomodate the maximum decimation (usrp/fpga/sdr_lib/cic_decim.v) I'm waiting on hearing the results of low pass filtering the "perfect samples" without decimation, and seeing if the problem still exists. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
