Broadcom provides Linux drivers for most of its wireless chipsets. Prior to the release of official drivers from Broadcom, the open source software community had various workarounds. Some people used Windows drivers through ndiswrapper. Others used fwcutter.
The RPM Fusion Repository for Fedora offers the Broadcom wireless drivers from its repositories. You can install them using yum.
Step 1: Enable the RPM Fusion repositories
rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm