Fondation B Com

Thomson Licensing

Luc Le Magoarou

Stéphane Paquelet

Quang Khanh Ngoc Duong

Alexey Ozerov

Antoine Le Calvez

A pilot sequence includes pilot vectors to be transmitted in a communication channel. A method of determining the pilot sequence comprises determining an orthogonal basis of a real vector space that is an image of a matrix having, respectively as columns, the partial derivatives of the model vector with respect to the different real parameters; and constructing the pilot vectors using the determined orthogonal basis, by grouping the orthogonal vectors of the orthogonal basis in at least one pair and by producing, for each of the at least one pair comprising a first vector and a second vector, a pilot vector by summation of the first vector and a product of the second vector by an imaginary number.

Method and device for determining a pilot sequence, associated method for estimating a channel and computer program

A method for estimating a wireless communication channel between a transmitter and a receiver, including a plurality of paths for propagation of a wave, at least one of the transmitter and the receiver being formed of a plurality of antennas. The method includes: for at least one path, determining a characteristic matrix, which depends on a first element representative of at least one propagation direction associated with the path, and a second element representative of a propagation distance associated with the path; and estimating the communication channel from the at least one obtained characteristic matrix.

Method for estimating a wireless communication channel, device for estimating a wireless communication channel and computer program therefor

Separation of speech and background from an audio mixture by using a speech example, generated from a source associated with a speech component in the audio mixture, to guide the separation process.

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Rennes, France

Luc Le Magoarou