Eric Smith wrote:

> In order to facilitate this process, the data is "scrambled" before it
> is transmitted, in order to ensure that the amplitudes of the I and Q
> carrier don't stay constant or near-constant for long periods.
> Scrambling involves exclusive oring the data with the output of an
> LFSR (linear feedback shift register).  The same LFSR structure is
> used on the receiving end to descramble the data.

  Now what I haven't twigged to, is how you synchronise the LFSR in
transmitter and receiver, or why you don't need to?
--
  Cheers,
        Paul B.