A land mobile satellite service using a multibeam phased array antenna with 19 spot beams and regenerative transponders in the forward and return link to serve up to 4000 telephony connections with small mobile terminals of up to 10 W RF transmit power is introduced. Critical subsystems such as the deployable antenna, reconfigurable regenerative transponder, a robust adaptive thermal control system, on-board processing for packet-based services, and, possibly, the implementation of an on-board network control station require attention. The precise identification of the satellite system role in the overall land-mobile network and of the services to be provided; propagation characteristics, and coding/automatic repeat request techniques are also very important.
Advanced Regional Mobile Satellite System for the Nineties
1986
6 pages
Report
No indication
English
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