•Send back signals from the antennas as analog or digital? As
sub-bands?
•Limited dynamic range of analog fiber-optic transmission.
•Digitization of the strongly varying signal:
–1. Apply AGC before the digitizer, calibrate later,
or
–2. No AGC, keep gain constant, but allow enough
bits.
•There’s a lot to be said for 1-bit digitization. (Loss of S/N
isn’t an issue.) Can we get away with it?