Abstract: A method for controlling a satellite configured to exchange data with a plurality of vehicles positioned in a visibility zone of the satellite. The method includes estimating a number of vehicles eligible for a specific service present in the visibility zone using a global data receiver module configured to receive data from all of the visibility zone; and activating, depending on the estimated number of vehicles eligible for the specific service in the visibility zone, the global data receiver module or all or some of the local data receiver modules, configured to receive data from a respective sub-zone of the visibility zone, for reception of data.

Abstract: The invention relates to a method for activating a vehicle function, by way of an activation device (D), on the basis of a visual recognition of a user (U), the activation device comprising at least one camera (C1, C2) that is oriented toward the outside of the vehicle and equipped with visual recognition means, and at least one ultra-wideband (UWB) transceiver (EM1, EM2) capable of detecting a presence inside the vehicle, the method being characterized in that the transceiver is first modified to allow it to transmit to the outside of the vehicle at different refresh rates (F) and in that it comprises the following steps: a) transmitting to the outside of the vehicle at a first refresh rate (Fa), b) receiving the reflected waves, c) detecting presence in a predetermined area around the vehicle, d) adapting the refresh rate (F1, F2) according to a distance (d) between said presence and the vehicle, the frequency being higher when the presence is close to the vehicle, e) activating the camera only when the

Abstract: A method for activating a vehicle function using portable user equipment communicating via ultra-wide band with an activation device on the vehicle. The activation of the vehicle function is carried out as a function of a position of the portable equipment relative to a boundary between an internal zone and an external zone of the vehicle. The activation method including: previously equipping the vehicle with an internal and external antennas; determining the presence of the portable equipment in an authorization zone around the vehicle; storing a power delay of the multi-path ultra-wide band signals received by each antenna according to time; determining an attenuation delay of the received power; comparing the attenuation delay with at least one reference delay; determining whether the portable equipment is located in the internal zone or in the external zone; activating the vehicle function corresponding to the position of the portable equipment.

Abstract: A method for detecting presence by ultra-wideband inside a locked vehicle, by a detecting device including at least one internal module and at least two external modules. The method including: a) detection of locking; b) for a first period of time, alternation of transmission by the internal module of waves at various predetermined frequencies and powers and simultaneous transmission of waves by a first external module; c) reception, by the internal module, of reflected waves; d) reception, by a second external module, of waves transmitted by the first external module; e) comparison between the waves received by the internal module and by the external module; and f) in case of simultaneous detection by both modules of an event, then detection of presence inside the vehicle.

Abstract: A method for scanning for presence inside a vehicle, using a scanning device including at least one internal and one external ultra-wideband transceiver module for locating portable “hands-free” access equipment carried by a user. The device has an Ultra High Frequency communicator for communicating with the equipment. The method includes: a) detecting locking of the vehicle; b) for a predetermined duration: i) scanning for presence inside the vehicle with the internal module; ii) simultaneously transmitting a request to the equipment for detecting a U-turn by the user; iii) if a U-turn signal is received, stopping scanning and determining the position of the user with the two modules; iv) if presence is detected inside the vehicle, stopping scanning and transmitting a warning; c) when the duration has elapsed, if no U-turn signal is received and if no presence is detected, the position of the user is determined with the two modules.

Abstract: A method for activating a vehicle function via ultra-wideband communication by an item of portable user equipment. The device includes a plurality of transceivers, the vehicle function activated depending on a position of the item of portable equipment with respect to a boundary between two authorization zones, an internal zone inside and an external zone outside the vehicle.

Abstract: A method for estimating a number of vehicles present within an area of visibility of an LEO satellite that consumes little energy for the LEO satellite and that is compact in terms of bandwidth.

Abstract: An adaptive method for activating a vehicle function using a user's portable device and communicating in ultra-wideband with the vehicle.

Abstract: A satellite communication module for a vehicle. The module includes an electronic control unit and at least one antenna capable of communicating with a plurality of satellites that are characterized by a predefined orbital trajectory and the same predefined speed. The at least one antenna being configurable according to a plurality of configurations, each configuration allowing the at least one antenna to radiate in an angular window, each angular window corresponding to an area of the sky that is characterized by a longitudinal coordinate and a transverse coordinate. The control unit includes a memory area. The memory area including a calibration table of the at least one antenna. The control circuit being configured to adapt the radiation of the at least one antenna so that the antenna radiates in the direction of the at least one determined angular window during the corresponding given time interval.

Abstract: A method for activating a vehicle function, by an activation device including a transceiver to communicate with “hands-free” access equipment. The transceiver is equipped with a gyroscope and a magnetometer and two receiving antennas that have a coefficient of electromagnetic coupling between them that is below a threshold. The method includes the following steps for at least two consecutive footsteps: transmission of a signal comprising data of the gyroscope and the magnetometer of the “hands-free” equipment to the vehicle; comparison of the data with representative values of the gyroscope and the magnetometer of the transceiver; determination of a first direction of the user; determination of a second direction of the user based on an estimation of a first angle of arrival of the signal towards the transceiver; comparison of the first direction and the second direction; activation of the vehicle function on the basis of the result of the comparison.

Abstract: An electronic control unit for a vehicle. The electronic control unit including a memory region in which is stored a lookup table indicating, depending on a type of alert and on the distance between the vehicle and a traffic event relating to the alert, the need to send a response message to the alert signal. The electronic control unit being configured to: receive an alert signal relating to a traffic event containing the type of alert and the position of the traffic event, receive the predetermined position of the vehicle, determine the distance between the vehicle and the traffic event, determine, based on the lookup table and on the determined distance, whether or not there is a need to send a response message to the alert signal, and dispatch a command signal commanding a response message to be sent.

Abstract: A satellite communication module for a vehicle. The module includes an electronic control unit and at least one antenna capable of communicating with a plurality of satellites that are characterized by a predefined orbital trajectory and the same predefined speed. The at least one antenna being configurable according to a plurality of configurations, each configuration allowing the at least one antenna to radiate in an angular window, each angular window corresponding to an area of the sky that is characterized by a longitudinal coordinate and a transverse coordinate. The control unit includes a memory area. The memory area including a calibration table of the at least one antenna. The control circuit being configured to adapt the radiation of the at least one antenna so that the antenna radiates in the direction of the at least one determined angular window during the corresponding given time interval.

Abstract: The invention relates to a method for activating a function of a motor vehicle by means of an activation device comprising at least four ultra-wide-band communication external antenna modules and an ultra-high-frequency communication module, from an item of “hands-free” portable access equipment (SD) carried by a user, comprising an accelerometer, a gyroscope and a magnetometer, the activation of the function being triggered by detection of the presence of the user in a predetermined zone around the vehicle, and depending on an authentication result, the method comprising the following steps: s) determining an initial position of the item of access equipment with respect to the vehicle, t) measuring the values from the gyroscope, from the magnetometer and from the accelerometer, u) obtaining a value of the probability of the intention to activate a vehicle function, v) comparing the probability value with at least one predetermined threshold, w) transmitting, at ultra-high frequency from said item of equip

Abstract: A method for scanning for presence inside a vehicle, using a scanning device including at least one internal and one external ultra-wideband transceiver module for locating portable “hands-free” access equipment carried by a user. The device has an Ultra High Frequency communicator for communicating with the equipment. The method includes: a) detecting locking of the vehicle; b) for a predetermined duration: i) scanning for presence inside the vehicle with the internal module; ii) simultaneously transmitting a request to the equipment for detecting a U-turn by the user; iii) if a U-turn signal is received, stopping scanning and determining the position of the user with the two modules; iv) if presence is detected inside the vehicle, stopping scanning and transmitting a warning; c) when the duration has elapsed, if no U-turn signal is received and if no presence is detected, the position of the user is determined with the two modules.

Abstract: A method for activating a vehicle function using portable user equipment communicating via ultra-wide band with an activation device on the vehicle. The activation of the vehicle function is carried out as a function of a position of the portable equipment relative to a boundary between an internal zone and an external zone of the vehicle. The activation method including: previously equipping the vehicle with an internal and external antennas; determining the presence of the portable equipment in an authorization zone around the vehicle; storing a power delay of the multi-path ultra-wide band signals received by each antenna according to time; determining an attenuation delay of the received power; comparing the attenuation delay with at least one reference delay; determining whether the portable equipment is located in the internal zone or in the external zone; activating the vehicle function corresponding to the position of the portable equipment.

Abstract: A radio-transmitting sensor for a vehicle wheel, suitable for measuring at least one physical quantity and for transmitting a radio signal representative of this measured physical quantity. The sensor includes a measurement and transmission circuit, an antenna impedance matching circuit, and an antenna circuit. The sensor includes a sensitivity switch controlled by the measurement and transmission circuit and suitable for switching the antenna circuit according to two modes: a dynamic mode in which the antenna circuit is configured as a magnetic antenna, and in which the sensor transmits said radio signal representative of the measured physical quantity, this signal including transmitted data frames; and a static mode in which the antenna circuit is configured as an electric antenna.

Abstract: A method for determining the relative position of a metal object in relation to a user device and to a transmitter antenna of an inductive charging support when charging the user device. The method includes measuring the quality factor of the transmitter antenna, measuring the quality factor of the receiver antenna, and comparing the measured quality factor of the transmitter antenna with a predetermined quality factor threshold of the transmitter antenna and comparing the measured quality factor of the receiver antenna with a predetermined quality factor threshold of the receiver antenna so as to deduce therefrom the relative position of the metal object in relation to the user device and to the transmitter antenna or the absence of an interfering metal object.

Abstract: A device for high-frequency communication and for the inductive charging of an apparatus, including a charging surface, at least one charging antenna emitting a magnetic field at a low frequency and a layer of ferromagnetic material. The device includes at least one communication antenna and a printed circuit board. The communication antenna is in the form of a coil locally surrounding the layer with an axis of symmetry situated in a plane parallel to the layer. The material of the layer is selected so as to have, at high frequency, an imaginary part with sufficiently high permeability to generate leaks on a surface of the layer extending perpendicular to the layer, while at the same time maintaining, at low frequency, an imaginary part with sufficiently low permeability to allow inductive charging.

Abstract: A device for near-field communication with a portable user apparatus, includes: a first communication antenna located on a first carrier; a first device for activating the first antenna located on a second carrier, which is facing the first carrier and mechanically connected to the first carrier by pads. The pads are made of conductive metal and the device also includes: a second antenna, a first winding portion of which is located on one end of the first carrier and a second winding portion of which is located on one end of the second carrier, the two ends facing one another. The first portion and second portion of each winding electrically connected by a pad, the second antenna emitting an electromagnetic field, a main component of which is perpendicular to a main component of the electromagnetic field emitted by the first antenna; and a second device for activating said second antenna.

Abstract: A device for detecting the approach of a portable electronic apparatus and for communicating in the near field with a first antenna for communication at high frequency and an electrical power-supply and control unit having a device for measuring a variation in the amplitude of an electrical parameter representative of detection of the approach of the apparatus. The device includes a second near-field communication antenna housed in a space delimited by the first antenna and associated with a resonance circuit by being connected to the control unit by a switch having a first position for near-field communication where the second antenna is not supplied with power and a second position for approach detection where the second antenna is connected and enters into resonance with the first, active antenna.