On 12/29/2010 01:40 AM, James Jordan wrote: > Marcus, Thanks. I am dsp idiot, I thought decimation is only set the > sample rate before. Didn't know it also set up a filter. Correct decimation *requires* filtering, so that aliases don't end up in the output sample stream.
So-called "naive" decimation, which *only* changes the sample rate, ends up with alias frequencies in the output spectrum, which is definitely not what you want at all. If you're going to be experimenting with this stuff, I'd recommend getting a book on digital signal processing, or looking up some on-line tutorials. -- 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
