On Sun, Feb 15, 2009 at 05:50:24PM -0500, Marcus D. Leech wrote: > I have a complex stream that I've bandpass filtered so that it only > contains the positive frequencies. I want to turn this into > a real signal. In the reverse direction, you use a hilbert transform, > right? But how do you do it in the reverse direction? > Do I just do a complex-to-float, and take the one that's "real", and > ignore the other one?
You can do that, or use gr_complex_to_real() which I would prefer for
coid readability. In my textbooks, the baseband to passband relation is
often described as
s(t) = Re{ x(t) exp(j 2 pi fc t) }
which is exactly what you'd be doing then (x(t) being the complex
baseband signal).
Cheers,
MB
--
Dipl.-Ing. Martin Braun Phone: +49-(0)721-608 3790
Institut fuer Nachrichtentechnik Fax: +49-(0)721-608 6071
Universitaet Karlsruhe (TH) http://www.int.uni-karlsruhe.de/
pgp37sQqbzN3v.pgp
Description: PGP signature
_______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
