Importance

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Abstract

The invention relates to a receiver of signals of a satellite-based radionavigation system intended to calculate the position of a carrier very precisely. The receiver comprises several digital signal processing channels each associated with a satellite and each providing a first digital datum representing a pseudo-distance between the receiver and the satellite in the form of an instantaneous temporal position of a pseudo-random code and a second digital datum representing this pseudo-distance in the form of an instantaneous phase of the carrier of the signal transmitted by the satellite. According to the invention, the receiver comprises an extended Kalman filter. The Kalman filter for calculates an instantaneous position of the receiver, means for calculates propagation of a state vector, calculates registration of the state vector on the basis of observations relating to each satellite and of a matrix of observations. The Kalman filter calculates observation and calculates an estimated instantaneous pseudo-distance for each satellite.

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First Claim