Introduction of TDMA in the Intelsat system
Abstract
A 120 Mbps Time Division Multiple Access system (TDMA) employing Digital Speech Interpolation (DSI) will be introduced into the Intelsat network on the Atlantic Major Path 2 satellite in 1983. The system is designed to operate with an 80 MHz hemispheric beam and zone beam coverage transponders at 6/4 GHz, and with spot beam transponders at 14/11 GHz (cross-strapped transponders at 14/4 and 6/11 GHz may also be used). Using four-phase coherent phase-shift keying, the entire bandwidth of the 80 MHz transponders is occupied. Each TDMA terminal can transmit up to 16 bursts and receive up to 32 bursts per frame for a frame length of 1 ms. Each DSI module can accomodate 240 terrestial channels on 127 satellite channels. By 1993, it is expected that 60 percent of the Atlantic region traffic will be conveyed through TDMA.
- Publication:
-
Paris International Astronautical Federation Congress
- Pub Date:
- September 1982
- Bibcode:
- 1982pari.iafcT....W
- Keywords:
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- Intelsat Satellites;
- Pulse Communication;
- Satellite Networks;
- Time Division Multiple Access;
- Phase Shift Keying;
- Synchronism;
- System Effectiveness;
- Transponders;
- Communications and Radar