Abstract
Abstract A demand is anticipated for communication satellite facilities by-many small users, each of which will have widely different antenna size and data-rate requirements. A system using time-division multiple-access modulation (TDMA satisfies this demand. The satellite contains a hard-limiting repeater of moderate bandwidth. The satellite beacon transmits a frame synchronization signal from which all users derive basic timing information. Individual time slots in the time-division signal are assigned to individual users in accordance with their antenna terminal capabilities and data-rate requirements. This communication satellite system makes efficient use of radio-frequency (rf) spectrum and satellite power with simple user control based on time-slot allocations.
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