Hopefully you followed the steps to get a perfect Clean Reinstall - Factory OEM Windows 7.
As it suggests put your wireless driver
on a stick or CD so you can get online quickly to install your Windows Updates which will have more drivers
cued under Optional.
Your wireless driver is here: Download
It will be one of the two wireless drivers at the end of the list - try installing both if necessary until the icon becomes active in the System Tray, left click to connect to network. If there are problems rightclick the icon to run Troubleshooter.