Bootstrapping tandem GPS navigation receivers

Details Bootstrapping tandem GPS navigation receivers Bootstrapping tandem GPS navigation receivers

2006-06-06

2006-06-06

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07057554

ABSTRACT:
A bootstrapping tandem navigation receiver system includes two independent navigation receivers. A first uses coherent detection and makes carrier-phase pseudorange measurements. A second uses non-coherent detection and a longer predetection interval and thus can acquire satellites in very weak signal environments. The second navigation receiver delivers a bootstrapping message to the first receiver that allows it to directly acquire the satellites without searching for them. The first navigation receiver then drives to find carrier phase lock and produces its more accurate measurements.

REFERENCES:
patent: 5642285 (1997-06-01), Woo et al.
patent: 6437734 (2002-08-01), McBurney et al.
patent: 2003/0227963 (2003-12-01), Dafesh

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