The decimation process is done in the FPGA inside the USRP1. Why are you trying to redo that outside ? It is intended to reduce the bandwith over the USB...
Regards Sylvain Azarian www.tools4sdr.com 2010/6/21 devin kelly <[email protected]> > > What about a more reasonable decimation rate, like 32 or 64... Could I > collect samples 50%-75% of the time and then process that data the rest of > the time? > > Thanks again, > Devin > > > On Fri, Jun 18, 2010 at 10:09 AM, devin kelly <[email protected]> wrote: > >> Hello, >> >> I'm interested in doing a project with the Beagle Board and the USRP1, >> along with using gnu radio. My lab doesn't have a Beagle Board or USRP1 >> (only USRP2s), so I need a few questions answered before I commit to this >> platform. >> >> What type of performance can I expect from the Beagle Board? I'm mostly >> interested in doing FFTs with some comparatively small processing on that >> data, is this possible? >> >> What sort of decimation rates can I use and expect near real time >> performance for this application? I have a few (albeit several years old) >> machines that struggle with just taking an FFT with a decimation rate of >> around 8. This is on the USRP2 as well. >> >> Any advice at all is appreciated. >> Devin >> > >
