I know of at least one open implementation of a wifi and BTLE modem made by a small university research team (though I can't find it online so it may not be pub

I know of at least one open implementation of a wifi and BTLE modem made by a small university research team (though I can't find it online so it may not be published yet, won't say who it is unless I can find public details). It's definitely possible but it did take a team of grad students a little over a year to tapeout, and so it'd likely be very expensive