Thales

Alcatel

Alcatel Lucent

Yann Oster

Michel Sotom

Aline Briand

Aubin Michel Lecointre

Norbert Venet

A method for protecting a reconfigurable digital integrated circuit includes multiple parallel processing channels each comprising an instance of a functional logic block and an error detection unit, the method comprising the successive steps of: activating the error detection unit in order to detect an error in at least one processing channel, executing the data replay mechanism, and then activating the error detection unit in order to detect an error in at least one processing channel, if an error is detected again, executing a self-test on each processing channel, for each processing channel, if the self-test does not detect any error, executing the data replay mechanism for this processing channel, if the self-test detects an error, reconfiguring that part of the configuration memory associated with this processing channel.

Method for protecting a reconfigurable digital integrated circuit against reversible errors

A multichannel transmission system which includes a calibration functionality that allows precise calibration of the frequency conversion chains and of the multiport amplifier of the system to be performed without interruption of service. The proposed calibration makes it possible to correct the defects over the entire frequency band of the system.

Self-calibrated multi-channel transmission system for a satellite payload

A system for estimating a pointing error of an antenna (ANT) of a satellite, the satellite includes a payload (CU) comprising a multichannel transmitter or receiver comprising a multichannel antenna (ANT), one analogue processing chain per channel and a set of digital integrated circuits (PN), the system comprising an estimation device (EST), implemented aboard the satellite or in a ground station, for estimating a pointing error of the antenna, the device for estimating a pointing error being configured to: acquire, for at least two channels of the transmitter or of the receiver, at least two test signals, each test signal having been transmitted or received by the antenna along a different direction (&#x3b8;, &#x3b8;), for at least one pair of acquired test signals, determine, for each test signal, a relative complex gain between the test signal received or transmitted respectively on two distinct channels, determine a comparative measurement between the two test signals from either the ratio between the two relative complex gains and/or the difference between the phases of the two relative complex gains, determine a pointing error (d&#x3b8;) of the antenna on the basis of the comparative measurement, of the expected directions of transmission or of reception of the test signals (&#x3b8;, &#x3b8;) and of a model of the gain of the antenna for each channel and in a plurality of directions.

System and method for estimating a pointing error of a satellite antenna

A system for calibrating a payload of a satellite, the payload includes a multichannel transmitter or receiver comprising an antenna, one analogue processing chain per channel and a set of digital integrated circuits, the system comprising a calibration device configured to: acquire for all the channels of the transmitter or of the receiver, a digitized calibration signal, set a reference channel and, for each of the other channels, determine a relative complex gain between the channel and the reference channel, for a plurality of frequencies of the calibration signal, correct the relative complex gain of a relative gain of the antenna of the satellite between the channel and the reference channel, estimate a relative delay, estimate a relative phase difference for the set of frequencies, deliver a correction of the relative gain, phase difference and delay of the channel with respect to the reference channel for a set of frequencies.

System for calibrating from the ground a payload of a satellite

A system for augmenting the coverage, information and robustness of an automatic identification system of ships incorporates standard AIS-type means, satellite links, coastal stations and processing centers handling the coordination of the means (maximizing the coverage of the system in time) and the processing of the data (merging of different information to create extended context information). The system implements a scheduling algorithm for the resources mobilized, in order to optimise the coverage by ensuring a given level of redundancy for the purposes of reliability and responsiveness of the system.

System for augmenting the coverage, information and robustness of automatic identification devices of ships

A method is disclosed for acquisition by navigation terminals of navigation signals broadcast by satellites of a global navigation satellite system (GNSS). A communication channel enables nearby terminals to exchange information and to constitute a network to provide assistance and to enable terminals to collaborate by sharing their respective resources and contributing to the computing operations involved in the execution of an acquisition phase for tuning to the navigation signal from a satellite in view. The method can be applied to any global navigation satellite system.

Growing community of inventors

Toulouse, France

Yann Oster