...but if any mathematicians,  number theorists or cryptographers
should be reading this...

I've just got a WSPR generating routine running on a PIC / AD9852 /
GPS combination, but I'm looking for a half-decent way of generating a
pseudo random Tx/Rx sequence with defined duty cycle that does not
give the long(ish) consecutive runs of 0's or 1's that MUST ALWAYS
occasionally be seen in a truly random sequence.

In other words, the sequence needs to be bandpass filtered.

Before I cop-out and just use a pre-generated set of lookup tables,
take a look at   http://www.g4jnt.com/WSPR_PN_Sequence.pdf
for a fuller description of the mind-bender


Andy  G4JNT
www.g4jnt.com