Fix BCM43XX issue

0- Check you wireless card with command: lspci -vnn|grep Wireless

Result:

0c:00.0 Network controller [0280]: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] (rev 01)
    Subsystem: Dell Wireless 1510 Wireless-N WLAN Mini-Card [1028:000d]

1- Add RPM fusion repositories. Exemple on Fedora 14: 
root# yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

2- Install driver package 
root# yum install broadcom-wl

Reboot if necessary