Mike Harrison:

I think there may be some confusion arisin here - I was under the impression
that the issue was
generating RF -suitable data patterns from TX uart.
I don't think anyone was proposing trying to receive it via a uart - if so,
it's really not a good
idea.
What you typically see is noise, then the preamble, which stabilises the
gain and the data slicer,
then you need some synchronisation pattern or gap to define the byte
framing.
A bit-bashed receiver (or interrupt driven, or using input capture hardware)
which can deal with all
the rubbish correctly is not hard to implement and will be much more
reliable than trying to bend a
UART into doing something it's not deaigned for.

Bob Ammerman:

Ah.... but that is the neat trick here. You can use the way the UART handles
framing errors to get you properly into byte sync. See
http://www.piclist.com/techref/microchip/ammermansync.htm for the details.

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