Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-06-02
2000-02-29
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 121, 455 133, H04Q 720
Patent
active
060320419
ABSTRACT:
A satellite-based communications system operating at high data rates includes a plurality of satellites each having uplink and downlink antennas for transmitting and receiving a plurality of signals utilizing a plurality of spot beams to and from a plurality of coverage areas at a predetermined range of frequencies. The system also includes a plurality of user terminals for transmitting and receiving signals to and from the plurality of communications satellites at the predetermined range of frequencies and at one of the first plurality of data rates. Each of the user terminals having a steerable antenna for tracking relative movement of each of the user terminals with respect to each of the plurality of communications satellites and for tracking movement of each of the plurality of communications satellites in order to maintain communications with the plurality of communications satellites.
REFERENCES:
patent: 5008952 (1991-04-01), Davis et al.
patent: 5233626 (1993-08-01), Ames
patent: 5551624 (1996-09-01), Horstein et al.
patent: 5722042 (1998-02-01), Kimura et al.
patent: 5860058 (1999-01-01), Daniel et al.
patent: 5924014 (1999-07-01), Vanden Heuvel et al.
Pavloff Michael S.
Wainfan S. Lynne
Wang Arthur W.
Wesel Ellen K.
Duraiswamy V. D.
Eisenzopf Reinhard J.
Fuller Greta J.
Hughes Electronics Corporation
Sales M. W.
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