Sylvain, Sorry for not being clear. I was just trying to say that, the higher the decimation rate the more data I have to process, I wasn't talking about decimating twice.
So would I'd like to do is record samples for 0.5 to 0.75 seconds (for example), then do some processing on those samples for the remaining, 0.25 to 0.5 seconds, and repeat. The processing I'm thinking of is taking an FFT, making a decision, then recording it to non-volatile storage. So my question is, to do processing like I described, what sort of decimation rates can I choose? Devin On Mon, Jun 21, 2010 at 9:01 AM, devin kelly <[email protected]> wrote: > > 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 >> > > -- http://users.wpi.edu/~dkelly/
