On Tue, 2008-05-20 at 21:00 -0400, Brian Padalino wrote: > On Tue, May 20, 2008 at 8:52 PM, Charles Swiger <[EMAIL PROTECTED]> wrote: > > > > gr_complex IQ = input * gr_complex(a_cos,-a_sin); > > > > which would be necessary to handle negative frequencies I think. > > > I don't know much about 8-VSB, but I was under the impression that > it's a single sideband modulation scheme that benefits from being real > only to avoid all the complex math associated with other modulation > schemes.
The issue turned out to be jiggering the numbers that say "I strongly suggest that you not mess with these..." * by .707 for the bit timing loop worked ;) We want a complex pll so it can take data directly from the usrp centered on DC, w/o having to mix it up to 5.75e6 and converting to real for the old fpll, which was just a trick to look like the old mc4020 adc boards. --Chuck _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
