Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1996-04-05
1998-09-29
Oen, William L.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
G01S 502, H04B 7185
Patent
active
058151141
ABSTRACT:
A positioning system for locating objects in places where standard Global Position System signals do not penetrate. A first embodiment uses a GPS receiver and a clock recovery unit. A computer receives the positional information and accurate time information. The computer calculates new orbital data for at least four pseudosatellites. The pseudosatellites are antennas positioned in an interior or shielded space and function to send pseudosatellite data to a receiver. In a second embodiment, the positions of the pseudosatallites are provided to the computer without the use of a GPS receiver. An accurate clock signal is also provided. The computer calculates orbital data for each pseudosatellite and transmits the time signal and ephemeris data for each pseudosatellite. The time signal is delayed for each pseudosatellite to account for propagation delays due to different connecting cable lengths.
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Schupak Leonard
Speasl Jerry A.
Bickel Arthur S.
Braun Robert T.
Discovision Associates
Oen William L.
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