http://ubuntuforums.org/archive/index.php/t-2028475.html

http://www.orbit-lab.org/kernel/compat-wireless-3-stable/v3.6/compat-wireless-3.6.6-1.tar.bz2

Step1: unpack the tar ball

cd /compat-wireless-2012-11-06/

Step2:

sudo su

Step3:

./scripts/driver-select rt2x00

Step4:

modprobe rt2800pci