Could somebody give me some tips and help on the following problem?
The input signal is b1(t)sin(f1t) + b2(t)sin(f2t), where f1 and f2
close but different, and b1(t) and b2(t) are two different square waves
with different period.
After the USRP down coverts this wave to the baseband, the two modulated
sine waves are mixed. How could I extract b2(t) or b1(t) respectively?
I tried to used a baseband filter, but it seems not work well.