I have not used one of those before so I can only give some general information.
You will need to use the carl9170
drivers for that device.
If you do an lsmod
does it show up anything relating to carl9170 ?
If it does, then do an ifconfig -a
and you should see an ath0 or something similar to that.
If you see that, then the wireless should be ready to use.
Use WICD or something similar for a graphic interface to setup your WiFi Card.
Otherwise you may need to get the firmware for the device.
Check apt-get to see if theres a firmware-atheros package. The name could be different as I can't check at the moment.
Otherwise, you can get the firmware from here
After the firmware is installed, try the lsmod
again and see how you go.