You will need to supply more information on what wireless device you have.
run "lscpi -v" to get some information. run "lscpi -n" to get the manid.
For usb devices, use lsusb instead.
Here is a Red Hat help page on installing firmware for a particular wireless device. It should give you an idea how to proceed:
https://access.redhat.com/kb/docs/DOC-17425