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