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    OPTIMIZATION OF THE COMPUTATION OF PARITY CHECK MESSAGES IN A MIN-SUM LDPC DECODING METHOD
    1.
    发明申请
    OPTIMIZATION OF THE COMPUTATION OF PARITY CHECK MESSAGES IN A MIN-SUM LDPC DECODING METHOD 有权

    公开(公告)号：US20250167806A1

    公开(公告)日：2025-05-22

    申请号：US18864841

    申请日：2023-03-23

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Lyonel BARTHE ,  Benjamin GADAT

    IPC: H03M13/11

    Abstract: The disclosure relates to an LDPC decoding method which involves performing iterations until a stop criterion is satisfied. Each iteration involves computing variable messages (αn,m), computing parity check messages (βm,n), and computing a posteriori estimation variables. Computing a parity check message (βm,n) for a parity check node (CNm) involves determining the two smallest values (Min1, Min2) among the absolute values of the variable messages associated with the parity check node (CNm), comparing a difference between said values with a threshold, determining a correction value according to the result of the comparison, and computing the parity check message according to the correction value.

    PROCESS FOR THE ACQUISITION OF IMAGES OF A SPACE OBJECT IN TERRESTRIAL ORBIT BY A SPACECRAFT IN TERRESTRIAL ORBIT
    2.
    发明申请
    PROCESS FOR THE ACQUISITION OF IMAGES OF A SPACE OBJECT IN TERRESTRIAL ORBIT BY A SPACECRAFT IN TERRESTRIAL ORBIT 有权

    公开(公告)号：US20250024153A1

    公开(公告)日：2025-01-16

    申请号：US18711010

    申请日：2022-11-16

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Cyrille TOURNEUR

    IPC: H04N23/695

    Abstract: A process for the acquisition, by a spacecraft in terrestrial orbit, of a useful image of a space object in terrestrial orbit that is gradually approaching the spacecraft from an upstream distal region towards a proximal region is disclosed including controlling the orientation of an array-type detection sensor in order to orient it towards the space object located in the upstream distal region, acquiring, via the array-type detection sensor, a so-called detection image of the space object located in the upstream distal region, determining trajectory-tracking information on the basis of the detection image, controlling the orientation of an array-type acquisition sensor on the basis of trajectory-tracking information, in order to orient it towards the space object located in the proximal region, acquiring, via the array-type acquisition sensor, a useful image of the space object located in the proximal region.

    ELECTRONIC SPATIAL SYSTEM
    4.
    发明公开
    ELECTRONIC SPATIAL SYSTEM 审中-公开

    公开(公告)号：US20240339826A1

    公开(公告)日：2024-10-10

    申请号：US18293698

    申请日：2022-07-19

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Vincent BUGAUT ,  Tony CHAPELET ,  Quang duc DAM

    IPC: H02H7/20 ,  G06T7/00

    CPC classification number: H02H7/20 ,  G06T7/0002 ,  G06T2207/30148

    Abstract: An electronic spatial system is disclosed including an electronic circuit that is sensitive to spatial radiation, including at least one signal input port and/or at least one signal output port; a signal processing unit; an electronic spatial radiation detection unit electrically connected to the signal processing unit; and at least one protective switch electrically connected between the electrical ground of the electronic spatial system and at least one out of the signal input or signal output ports of the sensitive electronic circuit, and controlled by the signal processing unit. The signal processing unit being configured to switch the at least one protective switch to the electrical ground upon detecting an amplitude of a signal that is representative of an amount of spatial radiation greater than a predefined radiation threshold.

    Device for deploying and pointing an equipment item carried by a spacecraft
    7.
    发明授权
    Device for deploying and pointing an equipment item carried by a spacecraft 有权

    公开(公告)号：US11834202B2

    公开(公告)日：2023-12-05

    申请号：US17926044

    申请日：2021-05-11

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Florent Tajan ,  Gilles Pupille

    IPC: B64G1/22 ,  B64G1/10

    CPC classification number: B64G1/222 ,  B64G1/10

    Abstract: A device for deploying and pointing an equipment item is disclosed including a mobile platform for receiving the equipment item, a carrier integrally secured to a wall of a spacecraft, and three identical linear actuators which connect the carrier to the mobile platform and are suitable for moving the platform in translation along one axis and for orienting the platform in rotation about two axes. Each linear actuator including a first portion connected to the platform by a universal joint, a second portion connected to the carrier by a pivot connection, a motor, and a screw/nut joint interconnecting the two portions, each universal joint being suitable for preventing the screw/nut joint from rotating about the axis, such that driving the motor causes a translational movement between the first and the second portion.

    Method for acquiring images of a terrestrial region using a spacecraft
    8.
    发明授权
    Method for acquiring images of a terrestrial region using a spacecraft 有权

    公开(公告)号：US11802766B2

    公开(公告)日：2023-10-31

    申请号：US17909214

    申请日：2021-03-03

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Mehdi Ghezal ,  Emmanuel Giraud

    IPC: B64G1/24 ,  G01C11/02 ,  H04N23/68

    CPC classification number: G01C11/025 ,  B64G1/244 ,  H04N23/685

    Abstract: A method (50) of acquiring images of a terrestrial region Z using a spacecraft (10) in non-geostationary orbit around the Earth (30), the spacecraft includes an observation instrument associated with a ground footprint of length L along the direction of travel, the method includes: a step (51) of observing a portion P1 of the terrestrial region Z, including a step of controlling the attitude of the spacecraft (10) during which the ground footprint is kept stationary during the entirety of the step of observing portion P1, and a step of acquiring an image of portion P1, a step (52) of modifying the pitch attitude of the spacecraft (10) so as to place the ground footprint over a portion P2 of the terrestrial region Z, and a step (53) of observing portion P2 of the terrestrial region.

    Method and receiver device for detecting the start of a frame of a satellite communications signal
    9.
    发明授权
    Method and receiver device for detecting the start of a frame of a satellite communications signal 有权

    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.

    METHOD FOR ADJUSTING THE ORBITAL PATH OF A SATELLITE
    10.
    发明公开
    METHOD FOR ADJUSTING THE ORBITAL PATH OF A SATELLITE 审中-公开

    公开(公告)号：US20230242280A1

    公开(公告)日：2023-08-03

    申请号：US17927638

    申请日：2021-06-10

    Applicant: AIRBUS DEFENCE AND SPACE SAS

    Inventor： Dorian GEGOUT ,  Frédéric RENAUD

    IPC: B64G1/24 ,  B64G1/68

    CPC classification number: B64G1/242 ,  B64G1/68

    Abstract: A method for adjusting the path of a satellite to limit a risk of collision with items of debris each having a date of closest pass with the satellite is disclosed including: propagating at least one orbit from the reference path of the satellite according to at least one manoeuvre to the farthest date of closest pass; determining a probability of collision for each item of debris according to the at least one orbit; determining at least one overall probability according to the set of probabilities determined; selecting the lowest overall probability from among the at least one overall probability obtained; determining a command for the satellite including the manoeuvre associated with the lowest overall probability.

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