The usual procedure is to go to System, Administration, Hardware Drivers. It
will tell you if there is a proprietary driver available and will install it
if that is your choice. Afterwards you need to set up your network and
connect.

If it shows in Hardware drivers, but is 'inactive' then you need to install
the driver. If no driver shows, then you may have to use ndiswrapper and use
a Windows driver or search for a Linux one.

This is the GUI approach and works for most wireless cards.