International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / To make the DGPS data link can be easily modified and updated, the ‘software radio’ technology becomes a logical architecture choice applying in a DGPS transceiver. This paper will discuss the system architecture and the key technology of software DGPS transceiver, which will become a multi-band and multi-function transceiver. It will operate at the uniform hardware platform to realize two receivers’ functions ¾ both the GPS receiver and the data link receiver (or transmitter). Then, this paper will give the design and implementation of the transceiver. Finally, it will demonstrate the simulation results of the system.