gnuradio : Toolkit that provides signal processing blocks to implement software radios ( https://www.gnuradio.org/ )
uhd : Universal Software Radio Peripheral (USRP) Hardware Driver ( https://kb.ettus.com/Knowledge_Base )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a phoenix591
For Paludis use this rsync : rsync://gentoo.zugaina.org/phoenix591-portage
If you have a problem : ycarus(-at-)zugaina.org