It's usually the transmit side, if you can do it, that's most useful. Even cheap receiver designs can manage a 3dB NF these days, and with the best will in the world, you won't improve that by more than 2dB - and at that, depending to some extent on the band in use, you'll be limited in fact by atmospheric and solar noise coming in the antenna.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.