Two-way global broadcast system architecture

The Global Broadcast System (GBS) implemented by the US. Department of Defense utilizes commercially-based Digital Video Broadcast (DVB) technology to enable highrate (10's of Mb/s), one-way, data dissemination to a large number of users. Currently, however, user terminals are limited to receive-only operation. For many users, a receive-only, configuration is not adequate and a low to medium-rate (10's to 100's of kb/s) return channel is required for true nework-centric operations and enhanced mission effectiveness. This paper describes a frequency re-use architecture that provides such return channel connectivity to a large number of users without requiring additional satellite bandwidth and with minimal interterence to current receive-only users.