Codeless GPS positioning method and apparatus for such codeless

Details Codeless GPS positioning method and apparatus for such codeless Codeless GPS positioning method and apparatus for such codeless

1996-03-13

1998-10-13

Issing, Gregory C.

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

Directive

Including a satellite

G01S 502

Patent

active

058218980

ABSTRACT:
The invention relates to a method and an apparatus for codeless GPS positioning. According to the method, the unit (2) to be positioned receives GPS signals from several satellites (4), the codes of the GPS signals are removed, and the extracted carrier signals are transmitted out from the unit (2) to be positioned for the purpose of determining the position and/or velocity of said unit (2) to be positioned. According to the invention, the carrier signal frequencies are detected by means of a phase-locked loop and the thus detected signals are transmitted in digital format out from the unit (2) to be positioned for the purpose of further processing.

REFERENCES:
patent: 4622557 (1986-11-01), Westerfield
patent: 4754283 (1988-06-01), Fowler
patent: 5119102 (1992-06-01), Barnard
patent: 5119504 (1992-06-01), Durboraw, III
patent: 5223843 (1993-06-01), Hutchinson
patent: 5379224 (1995-01-01), Brown et al.
patent: 5402442 (1995-03-01), Ishigaki
patent: 5420592 (1995-05-01), Johnson
patent: 5594454 (1997-01-01), Devereux et al.

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