In a message dated 3/28/01 2:58:35 AM Eastern Standard Time,
[email protected] writes:
<< What happens if you send a BPSK (instant phase switching) as reference
signal to a PLL ? >>
An interesting thought. (Apologies to everyone for the previous message
which ended at this point. I was typing merrily along, when AOL abruptly
announced: "your mail has been sent.")
The PLL would certainly perform filtering action, but I suspect some
attention would need to be paid to the loop filter. There will be a tradeoff
to be determined between settling speed and overshoot, but apart from that
I'd think it would be physically simpler to implement than the high-Q
filtering and limiting. An abrupt 180 degree transition is a bit ambiguous
for some phase detectors to handle, so a single stage of L-C pre-filtering
may still be desirable. Overall, though, this seems as if it should be
practical to try.
73,
John
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