Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Other

Commissariat À L'énergie Atomique Et Aux Énergies Alternatives

Bubendorff

Norbert Daniele

Dominique Noguet

Didier Lattard

Jean-René Lequepeys

Bernard Piaget

Sébastien Leveque

Laurent Ouvry

Rosolino Lionti

Roland Pelisson

Jean-Ren&eacute; Lequepeys

Jean-François Mainguet

Christophe Villien

Chadi Abou Rjeily

Didier Varreau

Benoit Denis

Pierre-Henri Thevenon

Florian Porte

Sebastien De Rivaz

Nicolas Deparis

Nicolas Bouquet

Jean Rene Lequepeys

David Schatz

Christophe Dall'Omo

A test device for a detector for detecting gas or a gas/particle mixture, includes a joining means for joining the test device to the detector; a container configured so as to receive a gas or a test gas/particle mixture; a diffusion means associated with the container and designed to diffuse the gas or the test gas/particle mixture in the detector; an energy source; and a radio apparatus able to manage local radio communication in order to remotely trigger the diffusion of the gas or of the test gas/particle mixture in the diffusion means from a control means. A test system comprising at least one test device, at least one radio gateway, a control network comprising a control unit able to remotely control the test device and at least one communication link between the control unit and the radio gateway, said gateway being able to connect the radio apparatus and the control network.

Test device and system for a detector based on the detection of a gas or of a gas/particle mixture

The bottle has a neck sealed by a stopper. The safeguarding device () comprises a first and a second part (), the first part () being adapted to be integrated in the stopper () and the two parts () being joined in translation while allowing a limited relative movement of one part with respect to the other when a traction force is applied to the safeguarding device () in order to remove said stopper () from the neck. According to the invention, the safeguarding device comprises an electrical component () disposed so that at least one electrical characteristic of said component is modified during the relative movement of the two parts ().

Safeguarding device designed to secure a container

An alert beacon carried directly by a human being is equipped with a transmit circuit able to produce an alert signal transmitted on the same channel as that used by a walkie-talkie. The transmit circuit has a memory containing, for each symbol of the coordinates of the current position of the alert beacon, an audio transcription of the symbol, and a microcontroller able to introduce, into the alert signal produced, the audio transcriptions recorded in the memory corresponding to each symbol of the coordinates in such a way that the coordinates can be played back in the form of a voice message comprehensible to a user of any walkie-talkie that has received this message on a channel that is being listened to.

System for transmitting an alert

A method for integrating signals transmitted from a transmitter to at least one ultra wide band receiver, includes initializing a measurement by estimating an initial clock drift &#x394;DHbetween said transmitter and said at least one ultra wide band receiver, thereby generating an estimated clock drift, executing an iterative loop, wherein executing said iterative loop comprises integrating at least one received primary signal, said at least one received primary signal composed of at least two samples, wherein integrating said at least one received primary signal comprises a first integration, and at least one of a second integration and a third integration, wherein said first integration uses said estimated clock drift, said second integration uses said estimated clock drift increased by a predetermined value, and said third integration uses said estimated clock drift decreased by a predetermined value, and selecting from among said integrations an integration that maximizes a quality criterion.

Method for integrating signals transmitted from a transmitter to at least one ultra wide band (UWB) receiver as well as device for the implementation of the method

Disclosed is a data transmission process using repetitive sets of spreading sequences, and corresponding transmitted and receiver. According to the invention, spectrum spreading is done on symbol packets using set of pseudo-random sequences used repetitively. This thus reduces interference between symbols. The present invention is applicable to digital communications by spectrum spreading.

Data transmission using repeated sets of spreading sequences

A method of sending ultra-wide band signals via a plurality of sending antennas includes a phase for sending training sequences followed by a phase for sending data after which each antenna of the plurality of sending antennas sends a waveform using a Hermite pulse that is unique and orthogonal to the waveforms sent by the other antennas, and a device configured to perform the method.

Multiple-input multiple-output ultra-wide band communication method and device using hermite pulses

Receiver module and receiver formed from several cascaded module. The module comprises inputs (E, E, E, E) and outputs (S, S, S, S) connected toaselectionmeans (44)circuit,toaswitchingmeans (45)circuit,and toadecodingmeans (46, 58, 60)circuit. Such modules can be cascaded by simply connecting the corresponding inputs and outputs.The final module delivers the transmitted information.Application to differential phase modulation and orthogonal modulation spread spectrum digital transmission.

Receiver module and receiver formed from several cascaded modules

Embodiments for non-coherent phase differential and multiple orthogonal signal modulation/demodulation are disclosed. One illustrative embodiment may include: a method for non-coherent reception of a signal with spectrum spreading, comprising performing a multiple orthogonal signal demodulation operation on the signal; performing a phase differential demodulation operation on the signal; and combining the results of the multiple orthogonal signal demodulation operation on the signal and the phase differential demodulation operation on the signal.

Non-coherent phase differential and multiple orthogonal signal reception

The invention relates to a learning process for an ultra wideband communication system with M transmission antennas and N reception antennas and in which the information is modulated on L possible positions comprising the following steps:

Multi-antenna communication system

A generator of repetitive sets of spreading sequences includes an element for counting and for forming an address and a table containing L sets of S sequences. The address contains q+logS bits. The q bits are used for selecting one set among L (L=2) sets. The log2S bits are used for selecting one sequence among the S sequences in the set.

Generator of repetitive sets of spreading sequences

A method for locating a UWB transmitter, without a previously-set reference, using at least one first set of at least three UWB searching transceivers, including first, second, and third transceivers. The method a) synchronizes the three UWB searching transceivers, arranged at three different points, and estimates the relative position of these three points; b) receives, by the three transceivers, signals transmitted by the transmitter to be located; and c) calculates the relative position, with respect to the three searching transceivers, of the transmitter to be located according to the time of travel of the signals, transmitted by the transmitter to be located, to the three searching transceivers.

ULB location system for rescuing avalanche victims

This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (R, R) with means for calculating a weighted sum of stored samples in the registers, p weighted sums (S, S) may be obtained and recombined with number p being, for example, equal to 2.

Parallel architecture digital filter and spread spectrum signal receiver using such a filter

A generator of repetitive sets of spreading sequences comprising element (), for counting and for forming an address and a table () containing L sets of S sequences, wherein the address contains q=1+logS bits, in which one set among L (L=2) sets is selected and wherein the logS bits select one sequence among the S sequences in the set.

Generator of repetitive sets of spread spectrum sequences

A data transmission process using repetitive sets of spreading sequences, and corresponding transmitter and receiver. Spectrum spreading is performed on symbol packets using sets of pseudo-random sequences used repetitively, thus reducing interference between symbols.

Growing community of inventors

Montbonnot, France

Norbert Daniele