Abstract: Synthetic aperture antenna device for receiving signals of a system comprising a carrier and means for determining its trajectory, comprising, for each signal respectively associated with a spatial direction, processing means adapted for generating a signal with stationary phase over a time window corresponding to the distance traversed by the device during the duration of coherent integration, after demodulation of the said signal received, the said processing means comprising correction means adapted for correcting the carrier phase of the said signal.

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: 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: 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 method in accordance with the invention, implemented with the aid of at least one pair of antennas, consists in performing: a normalized spectral analysis before intercorrelation of the demodulated signals (I, Q), by the code and the carrier, a phase coherence resetting of the signals before recombination, a phase offset measurement carried out by a true intercorrelation of the homologous satellite pathways by interferometry of the two signals arising from one and the same satellite and received respectively by a pair of antennas, then in performing a reduction of the initial ambiguity removal search domain for the determination of attitude of a vehicle by interferometric GPS measurement and implementing a statistical test for the selection of the ambiguity.

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 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 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 method in accordance with the invention, implemented with the aid of at least one pair of antennas, consists in performing: a normalized spectral analysis before intercorrelation of the demodulated signals (I, Q), by the code and the carrier, a phase coherence resetting of the signals before recombination, a phase offset measurement carried out by a true intercorrelation of the homologous satellite pathways by interferometry of the two signals arising from one and the same satellite and received respectively by a pair of antennas, then in performing a reduction of the initial ambiguity removal search domain for the determination of attitude of a vehicle by interferometric GPS measurement and implementing a statistical test for the selection of the ambiguity.

Abstract: A method for position determination with the aid of GPS satellites, including reception processing of a GPS satellite signal L2 modulated by an encrypted code Y having a key not available from the GPS satellite, so as to assess a delay of the signal L2 with respect to the signal L1 and to deduce therefrom the magnitude of the ionospheric effect so as to take account thereof and improve the accuracy of the location finding.