DGPS broadcasts using the Radio Broadcast System (RBDS) for IVHS

The Global Positioning System (GPS) is the primary choice in intelligent vehicle highway systems (IVHS) for vehicle location monitoring. The use of GPS technology in the autonomous mode is not accurate enough in urban environments. The major problem in vehicle location monitoring has been providing some form of efficient digital GPS (DGPS) correction broadcast. A cost effective solution to providing DGPS corrections for IVHS uses the new Radio Broadcast Data Standard (RBDS). The standard defines the broadcast format for transmitting data over existing FM radio station subcarriers.