Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Vincent Berg

Jean-Baptiste Dore

Franck Guyon

Francois Dehmas

Lionel Biard

Mélanie Descharles

Matthieu Gautier

Valerian Mannoni

Yoann Roth

Laurent Ros

Bernard Piaget

A wireless electronic detonator includes a primary source of energy and at least one functional module. A power switch is disposed between the primary source of energy and the functional module to connect or disconnect the functional module and the primary source of energy. A controller controls the power switch and includes an optical receiver to detect and demodulate a light signal emitted by a control console, The controller generates a control signal according to the demodulated light signal to at least control the power switch. A wireless detonation system includes the wireless electronic detonator and the control console configured to emit a light signal, and method for activating the wireless electronic detonator.

Wireless electronic detonator comprising a power switch controlled by an optical signal, wireless detonation system and method for activating such a detonator

The invention relates to a device for transmission of data on a frequency spectrum divided into a plurality Nof spectrum fragments (f, f) each of which covers a frequency band, the frequency bands being discontiguous. The device comprises a packet generator configured to generate a data packet comprising a payload and at least one occurrence of a constant envelope signalling sequence. Said sequence, for example a modified Zadoff-Chu sequence, comprises N complex symbols and consists of a plurality of complex symbol sets each associated with one of the spectrum fragments. Each set comprises N/Nf complex symbols and each complex symbol of a set comprises a scaling term to the frequency band covered by the spectrum fragment associated with this set and a spectral transposition term in the frequency band covered by the spectrum fragment associated with this set.

Device and method for communications signalling through a fragmented spectrum

A transceiving system using a joined modulation alphabet A having a size M the symbols of which are distributed on a plurality N of orthogonal dimensions, the symbols carried by a dimension belonging to a linear sub-alphabet Ahaving a size P, with M=NP. The transmitter performs a turbocoding of a block of information bits, the code words provided by the turbocoder being mapped to symbols of the joined modulation alphabet before modulating the signal to be transmitted. The receiver performs turbodecoding from the projection of the symbols received on the orthogonal dimensions of the alphabet.

Transceiving system using a joined linear orthogonal modulation

A filter bank multi-carrier (FBMC) receiver implementing a synchronization in the frequency domain. The receiver includes a synchronization module including an error estimator on the sampling instants and, for each subcarrier, an interpolating filter for reconstructing the samples at the accurate sampling instants. A phase-shifter is provided, for each subcarrier, at the output of the interpolating filter, to make a phase compensation. The phase-shifter can be followed by an equalizer in the frequency domain.

FBMC receiver using a method for synchronization in a frequency domain

The invention relates to a channel estimating method for an FBMC telecommunication system. The disclosed estimating method uses the signal before it is filtered by the analysis filter bank. According to a first embodiment, the preamble is composed of a repetition in time of an elementary pattern of pilot symbols and the channel estimate is made in the stationary part of the preamble. According to a second embodiment, the preamble is composed of a predetermined pattern of pilot symbols distributed in time and in frequency, and the channel estimate may be made on a typical part of the preamble. The channel thus estimated is used to make an equalisation before the analysis filter bank.

Channel estimating method for FBMC telecommunication system

The invention relates to a process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising:

Process and device for detection of a frequency sub-band in a frequency band and communications equipment comprising such a device

The invention relates to a treatment process of a signal received from a multi-carrier transmitter () with filter banks by a multi-carrier receiver () with filter banks, to perform synchronization from a preamble.

Growing community of inventors

Corenc, France

Vincent Berg