Extended range high sensitivity SPS positioning receiver

Details Extended range high sensitivity SPS positioning receiver Extended range high sensitivity SPS positioning receiver

2006-05-30

2006-05-30

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

07053826

ABSTRACT:
A roving extended range high sensitivity satellite positioning system receiver provides position fixes in adverse signal conditions as low as minus 150 dbm and with as few as three satellites by measuring the bit phase of the navData message and the codephase, and finding a simultaneous solution. Previous position fixes that were obtained in the vicinity by earlier rovers are deposited in an indexed database for consultation. A cellular phone system can be used to communicate the vicinity ID's and their database entries.

REFERENCES:
patent: 5134407 (1992-07-01), Lorenz et al.
patent: 6469663 (2002-10-01), Whitehead et al.
patent: 6882314 (2005-04-01), Zimmerman et al.

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