> > > > Typically, if you can't keep up at a slow decimation, going to a > faster one would make things worse, not better. The only thing I can > think of to explain what you are seeing is that you might be doing a > lot more processing at the lower rate. For example, at the lower > sample rate, you might be making your filter transition bands very > narrow, resulting in very long filters. > > Matt > > I've run into that problem (in a different context--not with USRP2). If you make your filter transition bandwidth some fraction of the overall bandwidth of the filter, you can end up with longish filters and lower bandwidths.
I was used to using an expression like (filter_bandwidth/10) for the transition bands, but that ends up with quite long filters. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
