公开(公告)号：US20190149187A1

公开(公告)日：2019-05-16

申请号：US16307059

申请日：2017-05-16

Applicant: B-COM

Inventor： Stephane Paquelet ,  Patrick Savelli

IPC: H04B1/69 ,  H04L27/10 ,  H04L27/14

Abstract: A method for demodulating a received signal resulting from the modulation of a basic chirp signal including estimating of a symbol carried by the received signal, implementing the following sub-steps: determining N decision components from the received signal and from a reference chirp signal obtained by modulating the basic chirp signal by a reference symbol corresponding to a symbol of rank r, a decision component of index l, denoted as a component Dl, being a function of a term, the phase of which depends quadratically on l, with l being an integer from 0 to N−1; and deciding the rank {circumflex over (k)} of the symbol carried by the received signal, from the decision component, of index k, denoted as a component Dk, having an extremum value among the N decision components,

公开(公告)号：US10965504B2

公开(公告)日：2021-03-30

申请号：US16307053

申请日：2017-05-16

Applicant: B-COM

Inventor： Stephane Paquelet ,  Patrick Savelli

IPC: H04L25/49 ,  H04B1/717 ,  H04L27/26 ,  H04B1/69

Abstract: A method for generating a pulse-position-modulated signal. The signal includes a temporal succession of waveforms among Ns waveforms obtained by time shift that is an integer multiple of an elementary time duration Tc. The method includes the following steps executed for a k rank symbol among Ns symbols: obtaining, a set of N modulation coefficients cl(k), a modulation coefficient of index n, cn(k), being expressed as the product of a reference modulation coefficient cn(r) coming from the Fourier series decomposition of a reference waveform associated with a symbol of rank r multiplied by a phase shift term the argument of which is proportional to n; and generating M temporal samples of a k-th waveform carrying the symbol of rank k by Fourier transformation of said set of N modulation coefficients cl(k).

公开(公告)号：US10374681B2

公开(公告)日：2019-08-06

申请号：US15748428

申请日：2016-07-19

Applicant: B<>COM

Inventor： Stephane Paquelet ,  Remi Bonnefoi

IPC: H04B7/06 ,  H04B17/336 ,  H04B7/0413

Abstract: A method for processing information representative of a transmission channel between a radio transmitter and a radio receiver. The information includes a matrix representative of the transmission channel. The method includes obtaining at least one pair of eigencharacteristics of the product of the conjugate transpose of the channel matrix with the channel matrix, consisting of non-zero eigenvalues; obtaining a measurement of a signal to noise ratio in the transmission channel; calculating at least one eigenvalue of an autocorrelation matrix of the symbols on transmission, according to a criterion of maximizing a capacity of the transmission channel, from the eigenvalues obtained; and transmitting to the radio transmitter information representative of the at least one calculated non-zero eigenvalue associated with the eigenvector.

公开(公告)号：US10686488B2

公开(公告)日：2020-06-16

申请号：US16307059

申请日：2017-05-16

Applicant: B-COM

Inventor： Stephane Paquelet ,  Patrick Savelli

IPC: H04B1/69 ,  H04L27/10 ,  H04L27/14

Abstract: A method for demodulating a received signal resulting from the modulation of a basic chirp signal including estimating of a symbol carried by the received signal, implementing the following sub-steps: determining N decision components from the received signal and from a reference chirp signal obtained by modulating the basic chirp signal by a reference symbol corresponding to a symbol of rank r, a decision component of index I, denoted as a component Dl, being a function of a term, the phase of which depends quadratically on I, with I being an integer from 0 to N−1; and deciding the rank {circumflex over (k)} of the symbol carried by the received signal, from the decision component, of index k, denoted as a component Dk, having an extremum value among the N decision components.

公开(公告)号：US20180219602A1

公开(公告)日：2018-08-02

申请号：US15748428

申请日：2016-07-19

Applicant: B<>COM

Inventor： Stephane Paquelet ,  Remi Bonnefoi

IPC: H04B7/06

CPC classification number: H04B7/0634 ,  H04B7/0413 ,  H04B17/336

Abstract: A method for processing information representative of a transmission channel between a radio transmitter and a radio receiver. The information includes a matrix representative of the transmission channel. The method includes obtaining at least one pair of eigencharacteristics of the product of the conjugate transpose of the channel matrix with the channel matrix, consisting of non-zero eigenvalues; obtaining a measurement of a signal to noise ratio in the transmission channel; calculating at least one eigenvalue of an autocorrelation matrix of the symbols on transmission, according to a criterion of maximizing a capacity of the transmission channel, from the eigenvalues obtained; and transmitting to the radio transmitter information representative of the at least one calculated non-zero eigenvalue associated with the eigenvector.