Locating a roving position receiver in a location network

Details Locating a roving position receiver in a location network Locating a roving position receiver in a location network

2006-08-18

2010-12-28

Phan, Dao L (Department: 3662)

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

Directive

Position indicating

C342S357250, C342S457000, C342S463000

Reexamination Certificate

active

07859462

ABSTRACT:
The system comprises a positioning-unit device (PUD) that receives, from other PUDs and other signal sources, one or more positioning signals, which each have carrier, code and data componcuts. In response to the received positioning signals and using their known locations, the PUD generates a unique positioning signal, which similarly has carrier, code and data components, all of which are respectively chronologically synchronized to the counterpart components of the received positioning signals. Once synchronized, other PUDs entering the network use the unique positioning signal as a reference, providing a time-coherent network of positioning signals that propagate a reference timebase over a geographical area. The invention also includes a roving position receiver that generates both code and carrier-based single point position determinations by making respective range measurements for each of the received chronologically synchronized code and carrier components, without the requirement for differential correction or absolute time accuracy within the network.

REFERENCES:
patent: 5583513 (1996-12-01), Cohen
patent: 6121928 (2000-09-01), Sheynblat et al.
patent: 2004/0198386 (2004-10-01), Dupray
patent: 2008/0101329 (2008-05-01), Richards et al.

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