Thank Brian, Can you give some hint, what do mean ??? I mean a little idea what do you want to say?
Best Regards Brian Padalino wrote: > > On Fri, Mar 20, 2009 at 9:34 AM, kaleem ahmad <kaleem_...@yahoo.com> > wrote: >> >> Thanks Ed, >> >> ADC sampling rate = 64MHz >> it gives resulution time = 1/64MHz = 156 ns >> if we choose N=512 for FFT then total observation time for one scan(one >> complete FFT) is = 156ns x 512 = 8 micro sec >> if the maximum possible (expected) cycle time is 200ms then: >> it needs 200ms/8microsec = 2500 continues FFT scans to cover the range of >> frequencies that correspond to 200ms cycle time. >> >> Is above calculation correct? >> >> The other possibility to increase the observation time is to increase the >> FFT size, but to cover entire 200ms would need 200ms/1/64MHz = 12800000 = >> FFT size (Which is not possible! Is it ???) >> >> Now please comment if my above calculations are correct or not and >> secondaly >> if my calculations are correct then how can I process (using GNURadio) >> 2500 >> cosective FFT's (with surety that no FFT in between these 2500 FFT's is >> missing due to slow processing or thread switching) to find two peaks in >> a >> single array (availability of two peaks will give me the oppertunity to >> calculate the time distance between them). > > It sounds like you're trying to do autobaud for an unknown FSK system > - but using the frequency domain to do this instead of the time domain > phases. > > I'd recommend thinking of an algorithm in the time domain that would > suit your needs. > > Brian > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/Can-threading-disturb-sensing-continuety-tp22598748p22621780.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
