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

Commissariat a L'energie Atomique

Luc Maret

Dimitri Ktenas

Jean-Baptiste Dore

Mathieu Bouvier Des Noes

Marc Laugeois

Mathieu Des Noes

Chiara Martinelli-Cattaneo

Mickael Maman

Xavier Popon

Youssef Nasser

Raffaele D'errico

David Miras

Gloria Makhoul

Mickaël Maman

A method for detecting at least one target buried in an area of the ground, using a ground-penetrating radar, the method includes the steps of: acquiring a measurement of a signal transmitted by each transmitting antenna and reflected in the area of the ground, converting an estimate, into the frequency domain, of the propagation channel for each pair consisting of a transmitting antenna and of a receiving antenna, defining a first hypothesis H0 corresponding to an absence of target in the area of the ground, defining a second hypothesis H1 corresponding to the presence of at least one target in the area of the ground, performing a test of the likelihood ratio between the likelihood of the channel matrix under the second hypothesis H1 and the likelihood of the channel matrix under the first hypothesis H0, in order to conclude whether a target is present at a given position in the area of the ground.

Target detection method for ground-penetrating radar and associated radar

This invention relates to an emitter for an optical communication system such as a Li-Fi system. This emitter comprises an M-PAM modulator and a conversion module to convert an M-PAM symbol into a plurality of logical outputs. It also comprises a plurality of branches in parallel, each branch comprising a switched current source mounted in series with the optical source, each switched current source being controlled by a logical output from the conversion module.

Emitter with M-PAM modulation for wireless optical communication system

A method of allocating transmission time slots in an optical wireless system. Resources are allocated taking account of asymmetry of interference diagrams on uplink and downlink and adopting reuse of transmission intervals for each channel, in areas in which there is no interference. In some embodiments, the allocation method allows for relaying between access points through the network to take account of the fact that the access point providing the best uplink (or downlink) can be distinct from the access point associated with the terminal.

Scheduling method for uplink and downlink of an optical transmission system

The invention proposes a method for the transmission of data in a cooperative network comprising a source terminal (S), a destination terminal (D) and a relay terminal (R), comprising:

Cooperative communication system with adaptive packet retransmission strategy

This method for carrying out the flexible demodulation of data modulated following an amplitude modulation in quadrature is used in a communications system employing a code division multiple access technique (CDMA) and an optical frequency division multiplexing (OFDM) using non-binary spread codes. The invention includes steps for determining a simplified expression specific to the logarithm of the likelihood ratio.

Method and device for carrying out flexible demodulation in an OFDM-CDMA system

A method of estimating an SINR ratio of an OFDM-CDMA transmission signal spread with spread codes, the transmission signal being transmitted between a transmission apparatus and a receiver apparatus, the method including: receiving the signal spread with spread codes at the receiver apparatus; and calculating, with a processor at the receiver apparatus, an estimate of the SINR ratio for the signal spread with the spread codes independently of a value of the spread codes.

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Polienas, France

Luc Maret