Abstract: A satellite positioning receiver is disclosed having at least one receive channel. Each receive channel is intended to perform a combined processing of a first S1 and a second S2 radiofrequency signals separated in frequency. The signals are received by analogue paths of the receive channel then digitized to be processed in digital receive paths. Each receive channel has a first (160) and a second (162) correlation circuits, respectively receiving the first and the second received digitized signals. Carrier and code phase discriminators are common to both correlation circuits. A local code generator is provided for each code correlation path. The local codes are offset by a positive differential delay correction +??cal for one of the correlation circuits and a negative differential delay correction ???cal for the other. These corrections tend to compensate for the relative delay difference between the two signals in the analogue paths of the receive channel.

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.

Abstract: A subject of the present invention is a method for the correction, upon reception in a moving object, of faults affecting the transmission of binary offset carrier radionavigation signals, enabling this correction to be carried out in a simple and reliable manner. The method of the invention is characterized in that each component of the signal received by a conventional BPSK demodulation method is demodulated, in that the phase differential of the two signals is compensated for, source by source, and in that a coherent tracking is carried out by summing the complex outputs of the demodulation processing.

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.

Abstract: The invention relates to a closed loop hybridising device comprising a Kalman filter bank, a virtual platform, a device to calculate pseudo-measurements estimated a priori. The Kalman filter bank comprises a principal Kalman filter adapted to the calculation of corrections to be applied to inertial measurements starting from all available pseudo-measurements, and n secondary Kalman filters adapted to the calculation of corrections to be applied to inertial measurements from a sub-set of available pseudo-measurements. The corrections originate from either the principal Kalman filter when no pseudo-measurement is erroneous or the secondary Kalman filter not affected by an erroneous pseudo-measurement. The corrections are applied simultaneously to inertial measurements and to the input to all other Kalman filters in the Kalman filter bank. In particular, the invention applies to a hybridising device using information provided by an inertial unit and a satellite navigation system, for example a GPS system.

Abstract: The invention relates to methods of processing signals subjected to interference. It consists, when this signal is formed of a first wideband channel and of a second narrowband channel modulating one and the same carrier in which these signals are cut off for the duration of the interference, in using a single phase loop and a single code loop to process these two channels simultaneously. It makes it easier to process signals in satellite based navigation systems of the GPS type when they are scrambled by the DME-type distance measuring system signals, as well as more generally making it possible to increase the robustness of the processing by joint processing of the bands broadcast to the users.

Abstract: The invention relates to a method of transmitting a radionavigation signal which comprises coded and interleaved data; the signal comprises a pathway modulated by the coded and interleaved data and another pathway not modulated by these data, and the pathway not modulated by these data comprises a known code Cp making it possible to synchronize on reception the deinterleaving of the interleaved data.

Abstract: The invention relates to a satellite position pinpointing receiver intended to carry out combined processing of a first received radio signal and a second received radio signal which differ in frequency. The receiver comprises: a first correlator circuit and a second correlator circuit receiving the first and second received signals respectively, each correlator having a carrier correlation channel, a code correlation channel and a code correlation channel integrator. The receiver furthermore includes: a central-carrier phase discriminator; a device, the respective local carriers for the carrier correlation channels, a code phase discriminator; and a numerically controlled oscillator, for each correlation channel. Applications: satellite radio navigation by GPS, Galileo, Glonass, etc.

Abstract: A device for detecting the displacement of an object comprising a ferromagnetic material, comprises a magnetic circuit generator provided with first and a second cores made of ferromagnetic material and an excitation coil and a measurement coil. The magnetic circuit generator is connected to a detecting unit designed to detect a reluctance variation brought about in the circuit by the displacement of the object and to deduce therefrom its position. In the device, the magnetic circuit generator comprises first and second transformers with open magnetic circuit, the transformers being juxtaposed and comprise each an axis extending across their respective core, the axes extending substantially perpendicular to the path. The excitation coil comprises two coils connected in series which form the primary windings of the first and second transformers.

Abstract: The invention concerns an additive-containing ground calcined alumina used as constituent of a refractory material precursor characterized in that it comprises an organofunctional silane, the organic function being typically an epoxy function, an alkyl function, an alcohol function or a diol function. Preferably said organofunctional silane is an oxyranyl-alkyl-silane, of chemical formula C9H20O5Si. Said additive-containing alumina can be obtained by adding said organofunctional silane during grinding to take advantage of its anti-caking properties, the intimate and homogeneous mixture being obtained as a result of grinding. It may also result from a post-grinding mixing.

Abstract: The invention relates to a satellite-based positioning receiver receiving signals from different satellites, comprising a correlation channel Cii per satellite received, each correlator channel Cii comprising: a correlation path, in-phase and quadrature, between the signal received and two respective local quadrature carriers (sine, cosine) generated by an oscillator with digital control of carrier; a code correlation path based on the signals I, Q output by the carrier correlation path, with the local codes provided by a digital generator of local codes; an integrator for providing, for each local code, signals Ic Qc at the output of the correlator channel Cii of the satellite received, c designating each of the local codes, the receiver according to the invention comprises, for each correlator channel of the signal received from a satellite, as many additional correlator channels as additional satellites received, and the local punctual code of the satellite received is correlated with the local codes of th

Abstract: The invention relates to a method of processing an analog signal whose frequency spectrum exhibits over a determined bandwidth two main lobes separated by a frequency band where the power is negligible; it comprises a step of sampling according to a determined sampling frequency, and prior to this sampling step, a step consisting in performing a frequency translation of the two main lobes towards one another with a view to reducing the bandwidth and hence the sampling frequency.

Abstract: The invention concerns a spray nozzle for a powder duster for dusting freshly printed products with a connection for a tube for supplying a powder-air mixture, a distribution chamber and at least two nozzle channels which branch off from the distribution chamber like a fan, wherein the opening angle of the outer nozzle channels limiting the fan subtends an angular range of 5° to 20°, in particular an angular range of 8° to 15°, and preferably 12°. The invention also concerns a spray bar with spray nozzles of this type, a powder duster comprising spray nozzles of this type, and a method for dusting freshly printed products.

Abstract: The invention relates to a method of acquisition of radio signals transmitted in particular by a satellite-based positioning system having a subcarrier, the acquisition of the signals being performed by a receiver having a channel for carrier correlation in-phase and quadrature, between the signal received and two respective in-phase and quadrature local carriers; a channel for subcarrier correlation on the basis of the signals at the output of the channel for carrier correlation with a local subcarrier; a channel for code correlation on the basis of the signals at the output of the channel for subcarrier correlation with the local codes provided by a digital generator of local codes; wherein in a first phase of acquisition, the channel for subcarrier correlation comprises two channels, in-phase and quadrature, between the signals at the output of the carrier correlation channel and two respective local subcarriers, in-phase and quadrature, with respect to the local code that are generated by a digitally cont

Abstract: The invention relates to a satellite-based positioning receiver receiving signals from different satellites, comprising a correlation channel Cii per satellite received, each correlator channel Cii comprising: a correlation path, in-phase and quadrature, between the signal received and two respective local quadrature carriers (sine, cosine) generated by an oscillator with digital control of carrier; a code correlation path based on the signals I, Q output by the carrier correlation path, with the local codes provided by a digital generator of local codes; an integrator for providing, for each local code, signals Ic Qc at the output of the correlator channel Cii of the satellite received, c designating each of the local codes, the receiver according to the invention comprises, for each correlator channel of the signal received from a satellite, as many additional correlator channels as additional satellites received, and the local punctual code of the satellite received is correlated with the local codes of th

Abstract: The invention relates to a satellite position pinpointing receiver intended to carry out combined processing of a first received radio signal and a second received radio signal which differ in frequency. The receiver comprises: a first correlator circuit and a second correlator circuit receiving the first and second received signals respectively, each correlator having a carrier correlation channel, a code correlation channel and a code correlation channel integrator. The receiver furthermore includes: a central-carrier phase discriminator; a device, the respective local carriers for the carrier correlation channels, a code phase discriminator; and a numerically controlled oscillator, for each correlation channel. Applications: satellite radio navigation by GPS, Galileo, Glonass, etc.

Abstract: The invention relates to methods of processing signals subjected to interference. It consists, when this signal is formed of a first wideband channel and of a second narrowband channel modulating one and the same carrier in which these signals are cut off for the duration of the interference, in using a single phase loop and a single code loop to process these two channels simultaneously. It makes it easier to process signals in satellite based navigation systems of the GPS type when they are scrambled by the DME-type distance measuring system signals, as well as more generally making it possible to increase the robustness of the processing by joint processing of the bands broadcast to the users.

Abstract: The invention relates to satellite radionavigation, in particular satellites radionavigation of GPS (Global Positioning System), Galileo, GLONASS (Global Navigation Satellite System, Russian definition) type. The solutions advocated by the state of the art for correcting the ionospheric error through the use of a dual-frequency receiver make the measurement less robust to the dynamic if the band used is narrow and less accurate if the band used is wide. The invention proposes a process comprises step a change of reference of the dual-frequency base to a (mean, offset) base, a correction on at least the offsets loop so as to obtain the offsets speed in this (mean, offset) base, an inverse change of reference so to as calculate on the basis of the offsets speed in the (mean, offset) base the relative speed in the dual-frequency base, and a correction of the code speed for each of the two frequencies by the relative speed obtained in the dual-frequency base.

Abstract: The invention relates to methods of processing satellite navigation signals which also support data.

Abstract: The invention concerns an additive-containing ground calcined alumina used as constituent of a refractory material precursor characterized in that it comprises an organofunctional silane, the organic function being typically an epoxy function, an alkyl function, an alcohol function or a diol function. Preferably said organofunctional silane is an oxyranyl-alkyl-silane, of chemical formula C9H20O5Si. Said additive-containing alumina can be obtained by adding said organofunctional silane during grinding to take advantage of its anti-caking properties, the intimate and homogeneous mixture being obtained as a result of grinding. It may also result from a post-grinding mixing.