Patent application number | Description | Published |
20120274511 | Satellite Based Augmentation System - A system for augmenting the availability and performance of a satellite geolocation system includes at least: a behaviour model of at least one of the satellites of said geolocation system incorporating new parameters with which to augment the operating range of said system; and an indicator of the deviation between said model and the real behaviour of said geolocation satellite, so as to enable the receiver to continue to use said geolocation satellite to determine its position, using the behaviour model, and outside the nominal operating range of the geolocation system. The parameters of the behaviour model include at least a model of distortion of the code chips transmitted by said navigation satellite to said receiver, or a model of distortion of the phase of the signal transmitted by said navigation satellite to said receiver. | 11-01-2012 |
20120286993 | Method for Detecting the Distortion of a GNSS Signal - A method for detecting the distortion of a GNSS signal transmitted by at least one GNSS satellite and received by at least one GNSS receiver, said distortion being caused by a GNSS signal generation defect, includes at least the following steps: a step for determining at least one autoregressive parametric model of the GNSS signal at the output of a correlation stage that said GNSS receiver includes; a step for computing at least one linear prediction error e(n) between said output signal of the correlation stage and said autoregressive parametric model; at least one step for comparing the linear prediction error to a detection threshold; and, a step for deciding on the distortion of the transmitted GNSS signal in the case where the linear prediction error exceeds said detection threshold. | 11-15-2012 |
20130201057 | Pseudolite Positioning System - A positioning system comprises a set of pseudolites distributed in a confined area, said pseudolites transmitting positioning signals characterized by their time desynchronization and their apparent Doppler frequency, said time desynchronization and/or said apparent Doppler frequency of the positioning signals transmitted by the pseudolites being configured so that there is no ambiguity concerning the location of the correlation peaks P | 08-08-2013 |
20140313077 | METHOD AND SYSTEM FOR DETECTING ANOMALIES ON SATELLITE NAVIGATION SIGNALS AND HYBRIDIZATION SYSTEM COMPRISING SUCH A DETECTION SYSTEM - A method for detecting anomalies on satellite navigation signals consists in extracting the code error values delivered at the output of the N code discriminators, and comparing the extracted code error values with a same first threshold value corresponding to an acceptable maximum code error value and assigning a confidence index to each navigation signal received on each reception channel i, the confidence index depending on the result of the comparison carried out on the code error values. | 10-23-2014 |
20150316656 | METHOD FOR DETERMINING THE POSITION OF A SATELLITE NAVIGATION SYSTEM RECEIVER, AND ASSOCIATED SYSTEM - A method is provided for determining the position of a satellite navigation system receiver in which use is made of a probabilistic weighting of the signals received, the weighting using a coefficient K | 11-05-2015 |