Hybrid inertial navigation system with improved integrity

Details Hybrid inertial navigation system with improved integrity Hybrid inertial navigation system with improved integrity

2006-01-03

2006-01-03

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

C342S357490, C701S213000, C701S220000

Reexamination Certificate

active

06982669

ABSTRACT:
The invention relates to an internal platform hybridized with a GPS receiver. The hybridization is achieved through a Kalman filter through which a new hybrid position D-HYB is estimated on the basis of a noted deviation between pseudo-distance measure by the receiver between the receiver and the various satellites and corresponding distances computed by the inertial platform between the platform and the same satellites. In this filtering, the distance increment from one measurement instant to the next instant, between the pseudo-distance previously measured by the receiver on a satellite axis of a deviation and the new pseudo-distance measured by the receiver on a satellite axis of a deviation and the new pseudo-distance measured by the receiver on this axis, is the phase variation ΔΦ=Φ(t)−ΦI (t−1) of a digital oscillator between the two measurement instants, this variation being referred to distance along the satellite axis. The oscillator is that which makes it possible to slave the local carrier frequency in the receiver to the carrier frequency received from the satellite. Application to the measurement of position.

REFERENCES:
patent: 5654890 (1997-08-01), Nicosia et al.
patent: 6161062 (2000-12-01), Sicre et al.
patent: 6292750 (2001-09-01), Lin
patent: 6424914 (2002-07-01), Lin
patent: 6785609 (2004-08-01), Suda
patent: 00 48014 (2000-08-01), None

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