公开(公告)号：US11985018B2

公开(公告)日：2024-05-14

申请号：US17797902

申请日：2021-02-02

Applicant: FONDATION B-COM

Inventor： Luc Le Magoarou ,  Stéphane Paquelet

IPC: H04L27/26 ,  H04L25/02

CPC classification number: H04L27/2613 ,  H04L25/0226

Abstract: 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.

公开(公告)号：US11374799B2

公开(公告)日：2022-06-28

申请号：US17288224

申请日：2019-10-09

Applicant: FONDATION B-COM

Inventor： Luc Le Magoarou ,  Antoine Le Calvez ,  Stéphane Paquelet

IPC: H04B7/0413 ,  H04L25/02

Abstract: 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.

公开(公告)号：US20210111707A1

公开(公告)日：2021-04-15

申请号：US16956159

申请日：2018-12-10

Applicant: B-COM

Inventor： Stéphane Paquelet ,  Ali Zeineddine

IPC: H03H17/02 ,  H03H17/06 ,  H04L25/03 ,  G06F17/17

Abstract: A digital interpolation filter delivering a series of output samples approximating a signal x(t) at sampling instants of the form (n+d)T s based on a series of input samples of the signal x(t) taken at sampling instants of the form nT s. Such a filter implements a transfer function in the Z-transform domain, H c d (Z−1), expressed as a linear combination between: a first transfer function H 1 d (Z−1) representing a Lagrange polynomial interpolation of the input samples implemented according to a Newton structure (100); and a second transfer function H 2 d (Z−1) representing another polynomial interpolation of the input samples implemented according to another structure comprising at least the Newton structure; the linear combination being a function of at least one real combination parameter c.

公开(公告)号：US12218711B2

公开(公告)日：2025-02-04

申请号：US18026984

申请日：2021-09-21

Applicant: FONDATION B-COM

Inventor： Matthieu Roy ,  Stéphane Paquelet

IPC: H04B1/20 ,  H04B17/309 ,  H04L25/02

Abstract: A method for detecting (DET) a signal in a communication system including a plurality of communication channels, from a plurality of noisy values respectively representative of the transmission through the communication channels, is provided. The propagation in the communication channels is characterized by at least one variable. The set of values that can be taken by the variable is divided into a plurality of ranges. The method includes receiving (E4) the signals respectively transmitted in the plurality of communication channels, and detecting (E20) a signal corresponding to a value of the variable lying within one of the plurality of ranges by comparing, with a predetermined threshold, a value taken by a correlator linked to the range in question and calculated as a function of the noisy values. A channel estimation method, a detection device, a channel estimation device and a computer program are also described.

公开(公告)号：US11652472B2

公开(公告)日：2023-05-16

申请号：US16956159

申请日：2018-12-10

Applicant: B-COM

Inventor： Stéphane Paquelet ,  Ali Zeineddine

IPC: H03H17/02 ,  G06F17/17 ,  H03H17/06 ,  H04L25/03

CPC classification number: H03H17/0294 ,  G06F17/17 ,  H03H17/0211 ,  H03H17/0621 ,  H04L25/03006 ,  H03H2017/0214 ,  H04L2025/03509

Abstract: A digital interpolation filter delivering a series of output samples approximating a signal x(t) at sampling instants of the form (n+d)T s based on a series of input samples of the signal x(t) taken at sampling instants of the form nT s. Such a filter implements a transfer function in the Z-transform domain, H c d (Z−1), expressed as a linear combination between: a first transfer function H 1 d (Z−1) representing a Lagrange polynomial interpolation of the input samples implemented according to a Newton structure (100); and a second transfer function H 2 d (Z−1) representing another polynomial interpolation of the input samples implemented according to another structure comprising at least the Newton structure; the linear combination being a function of at least one real combination parameter c.

公开(公告)号：US20220006674A1

公开(公告)日：2022-01-06

申请号：US17288224

申请日：2019-10-09

Applicant: FONDATION B-COM

Inventor： Luc Le Magoarou ,  Antoine Le Calvez ,  Stéphane Paquelet

IPC: H04L25/02 ,  H04B7/0413

Abstract: 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.