Satellite communication system and center station

Details Satellite communication system and center station Satellite communication system and center station

1998-10-06

2000-11-07

Legree, Tracy

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455527, H04Q 720, H04B 700

Patent

active

061448540

ABSTRACT:
A satellite communication system capable of notifying an user in speaking that a connection request is transmitted and capable of being implemented at low cost. A satellite communication system in accordance with the SCPC method using a voice activation is structured with a center station. The center station, when receiving a connection request to an user in speaking, measures a level of a carrier assigned to a reception line for the user with a demodulator. In this center station, when the level is not more than a predetermined level, the modulator transmits a signal notifying the user that the connection request is received.

REFERENCES:
patent: 4037158 (1977-07-01), Eastmondf
patent: 5636269 (1997-06-01), Eisdorfer
patent: 5930295 (1999-07-01), Isley, Jr. et al.

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