Brian, Dan, It is working now. Thanks again for your help.
One more basic "signal processing question" ... knowing that the input and output are complex (GMSK modulated signal), should I use complex or real coefficients for the resampler filter (rational_resampler_ccc, vs. rational_resampler_ccf) ? Regarding Ed, question on the LPF after the resampler, I am not sure... it does not seems to be needed... any clue? Thanks! On Tue, Apr 15, 2008 at 4:09 PM, Wireless Monster < [EMAIL PROTECTED]> wrote: > Brian, Dan, > Thank you very much for your help. It is clear now! > Rgds, > > > On Tue, Apr 15, 2008 at 4:05 PM, Dan Halperin <[EMAIL PROTECTED]> > wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > At hat point can I send the samples (for example from a file with > > > > gr.file_source) and guarantee they will be treated as a 270.8333Ks/s > > > stream? > > > > (assuming there will be enough samples to process) > > > > > > No. They will be treated like a 2Msps stream which is what you > > > interpolated your 270.8333Ksps stream to. You will have interpolated > > > your original signal by exactly 96/13 which will give you a 2Msps > > > stream. > > > > > > > I think you and Brian are experiencing notational confusion with Ks/s. > > If you treat the post-processed signal as a 2 Msamples/sec signal then the > > output signal will be a 270.733 Ksyms/sec. I believe that the USRP settings > > you describe will do just that. > > > > - -Dan > > -----BEGIN PGP SIGNATURE----- > > Version: GnuPG v1.4.8 (Darwin) > > > > iEYEARECAAYFAkgFCpoACgkQy9GYuuMoUJ5RJgCfcq8ShxoFNmhvWNLFxET0V1CC > > 4nMAoKb4DyL8RyBxWCCntsfMwKZssUoQ > > =dC0T > > -----END PGP SIGNATURE----- > > > >
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