I've been watching this topic with some interest. IMHO the only true
method of SS is the direct sequencing method. Frequency hopping sort
of "cheats" the concept of a wideband and barely distinguishable SS
system. Direct sequence is also more secure than FH.
Nonetheless, frequency hopping is considered spread spectrum in
today's marketplace.
As far as using SS on 11 meters, well...... First off, there are no
commercial CB radios made with this technology. Even hams have been
slow to embrace it. That's not to say that enterprising experimenters
have not played with it on 11 meters. Utilizing cordless phones and
transverters might yield satisfactory results. I'm sure there may be a
few that have. But it's hardly in widespread use.