Positioning system

Details Positioning system Positioning system

2007-01-30

2007-01-30

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

11128226

ABSTRACT:
For allowing positioning of a GPS receiver within a building, GPS primary positioning signals received by an outdoor receive antenna are up-converted to different carrier frequencies in the 2.4 GHz ISM band and the converted signals are transmitted each by a transmit antenna inside the building, the transmit antennas serving at the same time as access points of a WLAN which is used for transmitting additional positioning data like the positions of the transmit antennas and the signal delay times associated with them. By cycling through the secondary positioning signals received from the transmit antennas, i.e., down-converting each of them during an assigned time slot, and determining clock bias differences in the receiver, the position of the latter is determined using TDOA algorithms.

REFERENCES:
patent: 3750175 (1973-07-01), Lockerd et al.
patent: 5438337 (1995-08-01), Aguado et al.
patent: 5512902 (1996-04-01), Guthrie et al.
patent: 5729235 (1998-03-01), Guthrie et al.
patent: 5812086 (1998-09-01), Bertiger et al.
patent: 5815114 (1998-09-01), Speasl et al.
patent: 5959575 (1999-09-01), Abbott et al.
patent: 5982322 (1999-11-01), Bickley et al.
patent: 6147644 (2000-11-01), Castles et al.
patent: 6259400 (2001-07-01), Higgins et al.
patent: 6317079 (2001-11-01), Shannon
patent: 6882314 (2005-04-01), Zimmerman et al.
patent: 2003/0174090 (2003-09-01), Spilker et al.
patent: 2004/0021603 (2004-02-01), Zimmerman et al.
patent: 2004/0165657 (2004-08-01), Simic et al.
patent: 2005/0242994 (2005-11-01), Cobb et al.
patent: 2006/0022873 (2006-02-01), Zimmerman
G-I.Jee et al., “Indoor Positioning Using TDOA Measurements from Switching GPS Repeater,” ION GNSS 2004, p. 1970-1976.
J. Caratori et al., “UPGRADE RnS Indoor Positioning Systems in an Office Building,” ION GNSS 2004, p. 1959-1969.

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