On Fri, Aug 12, 2011 at 3:50 AM, Page Jack <[email protected]> wrote: > I use xlating filter to down convert signal. after I down convert signal it > I decode it. > however the data decoded is still the signal in 0 frequency before down > convert. > I check the xlating filter code it will change the signal phase to avoid > aliasing, yeah > it avoid aliasing but it is not the data I want how can I recover the data's > phase after > xlating filter? > > Regards!
Those filters are implemented as FIRs, which means they will have linear phase in the passband and constant (and known) group delay. In general, though, you will never know the phase of the incoming signal received over the air. If you have a signal where you require the phase, you'll have to figure out a way to recover it, anyways. Tom _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
