公开(公告)号：US11784709B2

公开(公告)日：2023-10-10

申请号：US17919187

申请日：2021-04-15

Applicant: AIRBUS DEFENCE AND SPACE SAS

Inventor： Lyonel Barthe ,  Benjamin Gadat

IPC: H04B7/185

CPC classification number: H04B7/18513

Abstract: A method and a receiver device for detecting the start of a frame of a satellite communication signal. A shaping filtering is applied directly after sampling of the signal, before a frequency correction is applied. During a first phase, an approximate frequency error and a candidate first sample for the start of the frame are estimated by performing several correlations respectively associated with different frequency hypotheses. The samples obtained after sampling or after shaping filtering are buffered during the execution of the first phase. Then, during a second phase, a final candidate sample for the start of the frame is determined from the memorised samples, using the approximate frequency error and the candidate first sample estimated during the first phase.

公开(公告)号：US11909416B2

公开(公告)日：2024-02-20

申请号：US18018224

申请日：2021-07-19

Applicant: AIRBUS DEFENCE AND SPACE SAS

Inventor： Benjamin Gadat ,  Lyonel Barthe

IPC: H03M13/00 ,  H03M13/11

CPC classification number: H03M13/116 ,  H03M13/611

Abstract: A data encoding device suitable for encoding a plurality of LDPC codes is disclosed including an input interface and an output interface, and a first circuit for encoding quasi-cyclic LDPC code, connected at an input to the input interface and at an output to the input of a first multiplexer circuit, a second circuit for encoding quasi-cyclic LDPC code, connected at an input to the input interface and at an output to the input of the first multiplexer circuit, a third circuit for encoding quasi-cyclic LDPC code, connected at an input to the output of the first multiplexer circuit and at an output to the input of a second multiplexer circuit.

公开(公告)号：US10554291B2

公开(公告)日：2020-02-04

申请号：US16323750

申请日：2017-07-27

Applicant: AIRBUS DEFENCE AND SPACE SAS

Inventor： Benjamin Gadat ,  Lyonel Barthe ,  Thibault Maisonnat ,  Arnaud Collin

IPC: H04B7/185 ,  H04L27/00 ,  H04L25/02 ,  H04B17/21

Abstract: A method for detecting useful signals in an overall signal. Each useful signal may be affected with a frequency drift. In the detection phase, frequency spectra for detecting the overall signal for multiple detection time windows are calculated and useful signals according to the detection frequency spectra are detected. In the estimation phase, for each useful signal detected: the frequency of the overall signal for multiple frequency drift values is reset. In the estimation phase, for each useful signal detected, a frequency spectrum is calculated for the estimation of the overall signal for each frequency drift value over an estimation time window having the useful signal detected and of a duration higher than the detection time window. In the estimation phase, for each useful signal detected, the frequency drift is estimated affecting the useful signal detected according to the estimation frequency spectra.