Position aided subscriber unit for a satellite cellular system

Details Position aided subscriber unit for a satellite cellular system Position aided subscriber unit for a satellite cellular system

1990-07-19

1992-06-02

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

340991, 342357, 364449, 455 89, 455 132, G01S 502, H04B 7185

Patent

active

051195046

ABSTRACT:
A subscriber unit for communicating with a satellite communication system. This subscriber unit receives and transmits digital data from satellites of a satellite communication system. In addition, the subscriber unit self-determines its own position and transmits this position to the satellites of the satellite communication system. In this way, the satellite communication sytem knows the position of each subscriber unit so that communications may be established more efficiently. In addition, the position of the subscriber unit is automatically determined from the received GPS signals and reported to the satellite communication system for other uses such as asset management and search and rescue operations.

REFERENCES:
patent: 4520474 (1985-05-01), Vilmur
patent: 4627099 (1986-12-01), Shimakata
patent: 4672382 (1987-06-01), Fukuhara et al.
patent: 4731613 (1988-03-01), Endo et al.
patent: 4897642 (1990-01-01), DiLullo et al.
patent: 4899285 (1990-02-01), Nakayama et al.
patent: 4918609 (1990-04-01), Yamawaki
patent: 4932072 (1990-06-01), Toko
Article entitled, "Principle of Operation of NAVSTAR and System Characteristics", Milliken et al, Global Positioning System by the Institute of Navigation, 1990.

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