| Since the formal ratification of the European Telecommunications Standards Institute’s (ETSI) Digital Video Broadcast – Satellite Second Generation (DVB-S2) standard in March 2005, the Department of Defense (DoD) has moved to develop and integrate this technology to benefit existing Joint Programs such as GBS and the Joint IP Modem. The Defense Information System Agency (DISA) has awarded a contract, under The Office of the Secretary of Defense’s (OSD) Defense Acquisition Challenge Program (DACP), to demonstrate the bandwidth savings that can be achieved for the Global Broadcast Service (GBS), by using the DVB-S2 waveform. Under this effort, specialized DVB-S2 transmitter and receiver equipment will be developed to include the capability to operate in the Variable Coding and Modulation (VCM) mode for one-way broadcast systems. This will conclude with a live demonstration of the technology over Military Satellite (MILSATCOM) and Commercial Satellite Communication (SATCOM) assets. The demonstration will show how the DVB-S2 waveform allows for optimization of the broadcast to support simultaneous transmission of information to specific terminal sets with different aperture sizes, including severely disadvantaged terminals. This paper will deliver the results of this demonstration and compare it to the theoretical analysis. Concepts and techniques needed for performing Single Carrier, Multi-Code link analysis will be described. In addition this paper will discuss the advantages of the Advanced Coding and Modulation (ACM) mode for two-way systems and its implementation challenges into the next generation Joint IP Modem Architecture. |