Method for compensating for doppler frequency shifts for satelli

Details Method for compensating for doppler frequency shifts for satelli Method for compensating for doppler frequency shifts for satelli

1996-09-03

1997-06-17

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342352, 342353, 455 121, 455 131, H04B 7185

Patent

active

056401663

ABSTRACT:
A satellite communication system (100) includes a satellite (102) in a predefined orbit projecting a plurality of beams (1-48) designating a coverage area (115). The satellite (102) has a communication device (200), a frequency synthesizer (222) for setting a frequency of the communication device for communicating via a beam of the plurality of beams (1-48) and a controller (216) coupled to the frequency synthesizer (222) for compensating for a Doppler frequency shift associated with the beam.

REFERENCES:
patent: 3757334 (1973-09-01), Raabe
patent: 3982075 (1976-09-01), Jefferis et al.
patent: 4188578 (1980-02-01), Reudink et al.
patent: 4628506 (1986-12-01), Sperlich
patent: 4792963 (1988-12-01), Campanella et al.
patent: 5432521 (1995-07-01), Siwiak et al.
patent: 5471648 (1995-11-01), Gourgue
patent: 5561838 (1996-10-01), Chandos et al.

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