Forum: GNU Radio direct sequence spread spcetrum

hi All,
I'm starting to work with a USRPn210 to implement a direct sequence and
a frequency hopping system, my intention is evaluate hybrid spread
spectrum for cognitive radios.
I've some troubles with DS in the spreading sequence 'cause i want to
use 11chips Barker sequence (802.11b), as far as i understand first i
have to spread the data with the sequence and then i modulated, im
thinking in psk modulation.
Besides that, i don't know how to achieve the adquisition for the
receiver.
Any help, suggestions or pieces of code about spread spectrum would be
very helpful.
Thanks.

Gonzalo
Metropolitan Autonomous University
México

Note: im working with usrpn210 and xcvr2450 and wbx
thanks