Need wired/wireless atheros driver for AR9285 and AR8152
You might need to install additional wireless drivers, this can be difficult without a network connection.
I recommend downloading the AMD64 .deb directly from this page and then copy them onto a USB key or CD-R and back onto your laptop. Then install it by double clicking on it and following the instructions in the Software Center, then you'll probably need to reboot. Your wireless card should work at that point.
After that install linux-backports-modules-wireless-maverick-generic so that you'll have that package installed so you'll get upgrades.
sudo apt-get install linux-backports-modules-wireless-maverick-generic