Some Broadcom chipsets can use the b43 driver and b43-openfwwf firmware included with Fedora. Many others have to use drivers and/or firmware from elsewhere. You should start by identifying which Broadcom chipset you have. Everything else you will do about this follows from that. You can go to the HOWTO on this subject for steps on that and on installing drivers for most of the Broadcom chipsets discussed around here.
http://forums.fedoraforum.org/showthread.php?t=239922
Do your best, and if you have problems or questions, then return here to deal with those.
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