Unfortunately the FAA mandated a gold plated standard for ADSB Out on 1080 MHz that's far too expensive for most spamcan owners.
The gold plated standard does provide for deconflicting wingtips on adjacent taxiways at the big airports, but folks, centimeter positional accuracy is gross overkill in the air as well as for GA aircraft with wingspans below that of a 737.
Some bright spark at the FAA cooked up UAT as an affordable system, but the 1080 ADSB Out folk are dependent on retransmission to see the little guys on their screens.