System, method, apparatus and means for constructing...

Details System, method, apparatus and means for constructing... System, method, apparatus and means for constructing...

2005-05-31

2005-05-31

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

06900758

ABSTRACT:
A server provides GPS aiding data to mobile GPS receivers are provided with an enclosed environment (e.g., within a large building) where the received GPS signal is likely to be weak or suffer multipath signal interference. The server receives GPS signals from one or more antennas within the enclosed environment and measures the multipath error in the vicinity of each antenna. Using the multipath error data for various satellite positions at various times, the server creates a delay model for the enclosed environment to generate GPS aiding data for the mobile GPS receivers. A generic delay model can be created that is applicable to similarly constructed buildings.

REFERENCES:
patent: 5815539 (1998-09-01), Lennen
patent: 5963582 (1999-10-01), Stansell, Jr.
patent: 6252546 (2001-06-01), Lennen et al.
patent: 6727846 (2004-04-01), Brown

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