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INTELSAT IV Satellite System (Voice) Channel Capacity Versus Earth-Station Performance

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1 Author(s)
Chakraborty, D. ; Communications Satellite Corp., Washington, D. C.

A comprehensive technical study has been performed to assess the optimum voice-channel capacity of a transponder as a function of the earth-station performance (ratio of receive antenna gain to system noise temperature) for various modulation techniques such as: a) single-carrier per transponder frequencydivision multiplexing frequency modulating (FDM/FM); b) multicarrier per transponder FDM/FM; c) pulse-code modulating, coherent phase-shift keying, time-division multiple access (PCMCPSK-TDMA); and d) SPADE (single-channel per carrier PCMCPSK-FDMA), which will be used in the INTELSAT IV satellite system. This study assumes a homogeneous system, i.e., the transmit and receive earth stations use an appropriately identical antenna performance.

Published in:

Communication Technology, IEEE Transactions on  (Volume:19 ,  Issue: 3 )