Eutelsat S a

M.b.i. S.r.l.

Calearo Antenne S.p.a.

Antonio Arcidiacono

Daniele Vito Finocchiaro

Alessandro Le Pera

Rocco Mauro Bueti

Marco Andrenacci

Ernst Eberlein

Fritz Schurig

Sebastien Grazzini

Alexandre Brunelle

Sébastien Grazzini

Daniel Zamberlan

Yan Brand

Daniele Vito Finocchario

Orazio Pulvirenti

Vito Rotondi

A method performed on-board by a satellite for processing a signal received from a terminal during a current time interval, includes receiving, during the current time interval, a main signal containing a message from a terminal, each message having a priority level; sampling the main signal to obtain samples; storing the obtained samples into the satellite memory; first demodulating the messages corresponding to the current time interval contained in the samples stored in memory; when the satellite is in the range of a ground station, transmitting to the ground station the content of the memory. The first demodulating includes, for each message of the messages contained in the samples and by priority order: demodulating and decoding the message; forwarding, using direct link or inter-satellite-link, the demodulated message to a ground station; estimating the number of remaining non-demodulated messages in the samples stored in the memory.

Method for adaptive demodulation and system implementing such a method

A method of generating interleaved symbols in a multiplexed data steam for a satellite broadcasting application to a plurality of receivers, includes allocating a plurality of data programs to a plurality of primary multiplexers according to a load balancing scheme; encoding in each primary multiplexer a plurality of data programs according to a coding scheme at a predefined code rate for generating encoded frames; and generating super frames in each primary multiplexer.

Method for protection of signal blockages in a satellite mobile broadcast system

A method for filtering a set of contents broadcast over a satellite link includes: a first reception of a user filter by at least one piece of user equipment, the user filter including a user identifier and a first list of multimedia contents, the first list being selected from a catalogue of multimedia contents that is available on a remote data server; a second reception of a set of multimedia contents of the catalogue by at least one piece of user equipment; filtering the contents by the piece of user equipment broadcast by the satellite depending on the user filter; storing the received and filtered contents in a memory of the piece of user equipment.

Method for filtering a multimedia catalogue received by satellite link and filtering device

A method for recovering content such as an HTML page corresponding to a URL address by a client device, includes, based on a URL address corresponding to the content, the client device checks for the presence of the content of the URL address in a cache memory of the client device; in absence of the content of the URL address in the cache memory, the client device creates a short message including the URL address; the message is transmitted to a server device by a one-way transmission protocol without establishment of a connection; the server device downloads the content corresponding to the URL address from the internet network; the content is transmitted to the client device by the server device via a one-way protocol with coding without acknowledgement; the content is received by the client device; and the content is recovered and stored by the client device in the cache memory.

Method for the recovery of content corresponding to a URL address by a client device

A method for generating a circular polarisation signal from at least two transponders of a satellite able to process linearly polarised signals includes: a transmission of at least two linearly polarised signal components so as to produce a circularly polarised signal by at least two transponders of a satellite; processing signals by the two transponders of the satellite to produce a circular polarisation of the signals transmitted by the satellite; ground receiving by at least one circularly polarised antenna; measuring a physical parameter from the received signals, and determining a correction parameter to be applied to the generation of the components of linearly polarised signals; generating a compensation of the components of linearly polarised signals transmitted to the satellite.

Method of generating circularly polarised signals from a polarisation controller of a ground station

A method for localizing a terminal includes transmitting the signal by the terminal; receiving the signal by a first and a second satellite; transmitting the signal from each satellite to a receiving station; demodulating the signal received by the first satellite to determine a signal content and the time of arrival of the signal transmitted by the terminal at the receiving station via the first satellite; determining the time of arrival of the signal transmitted by the terminal at the receiving station via the first and second satellite; determining a position for the terminal by triangulation.

Method of geo localization of a terminal sending a single signal to a satellite system

A transmission/reception installation for microwave radio signals, including a unit for transmission/reception including a receiver for receiving the electric signals from the conversion of radio signals received via a terrestrial or satellite link, referred to as forward-link signals, a demodulator for demodulating the electric signals using a first modulation/demodulation protocol, a modulator for modulating electric signals using a second modulation/demodulation protocol that is different than the first protocol, the second protocol being a spread-spectrum protocol, the modulator modulating the signals demodulated by the demodulator, and a converter for converting the electric signals modulated using a spread-spectrum protocol into radio signals that can be transmitted via a satellite link. The installation also includes one or more boxes including a modulator for modulating the electric signals using the first modulation/demodulation protocol, and a coaxial cable connecting the unit for transmission/reception to the boxes.

Transmission/reception of microwave signals broadcast by a satellite with an interactive return link using a spread spectrum protocol

A method for detecting an unbalance of a multi-port amplifier MPA intended to be on-board a satellite is presented. The MPA includes a plurality of paths, each path being configurable in gain and phase. The method includes transmitting a first test signal which is spread spectrum modulated from the first transmitting station to the first pathway, the first test signal being generated in at least the useful band of the first pathway; receiving by the second receiving station configured in frequency to receive signals transmitted by the second antenna connected to the second path of the MPA, the signals being likely to include a replica of the first test signal; detecting and measuring a power of received signals corresponding to a replica of the first test signal having leaked at the output of the second output port; computing at least one unbalance value of the MPA from the measurement of the power of the replica of the first test signal received in the second earth station.

Method for detecting an unbalance and for calibrating a multi-port amplifier of a telecommunications satellite

A process for measuring antenna gains of a transmitter for generating at least one radiation pattern of the antenna, the process including a plurality of transmissions of a test signal sent to a satellite to retransmit the test signal to a second terrestrial station, the transmissions being carried out according to different orientations, the test signal being spread spectrum modulated by a pseudo-random numerical sequence; a reception of each test signal; a demodulation of each test signal making it possible to measure the power of each test signal received; a comparison of each power with a first threshold; a generation of an encoding instruction aiming to encode a given number of sequences of data bits by at least one pseudo-random sequence.

Process for generating a mapping of the transmission or reception coverage of an antenna of a ground station for satellite links

A method for a push server to broadcast data to terminals via an interface device, the data sent by the server passing through a distribution system enabling the data to be broadcast from the server to the device. The server transmits a stream of content data and web application data to the system; the system multicasts the stream of content data and web application data to the device; a receptor in the interface device receives the data; the data are stored in a storage device of the interface device; a local wireless connection is established between a terminal provided with a web browser and the interface device; a HTTP query is transmitted from the terminal to a web server of the interface device, the query requesting the execution of an application stored in the storage device; and the requested application is executed in the browser of the terminal.

Method for a push server to broadcast data to user terminals via an interface device

A method for establishing radiofrequency links by satellite also making it possible to assure the return link transmission of hyperfrequency radioelectrical signals in an efficient manner in terms of performances, easily adaptable to a pre-existing broadcasting system, using the same forward link and return link frequency band, enabling the use of two independent terrestrial stations for the two channels, and enabling operation of the amplification chain of the transponder of the satellite at saturation or close to saturation.

Method for establishing radiofrequency links

A method for locating a terminal in a coverage area using a telecommunication network, the network including a multi-beam satellite, the area including various cells, each associated with a beam for linking to the satellite to which a frequency band is assigned, the method including: performing the uplink transmission of a message incorporated into a modulated signal to the satellite at a frequency shared by three different uplink beams such that the message is received by the satellite with three different amplitudes; performing the downlink transmission of three modulated signals incorporating the message, the first, second, and third signals each corresponding to a different beam from among the three beams; receiving the first, second, and third signals; determining the amplitudes of the message within the first, second and third signals; and determining the location of the terminal from the amplitudes of the message within the first, second, and third signals.

Method for locating a terminal at the surface of a coverage area by means of a telecommunication network using a multi-beam satellite

A network for establishing RF links between a main ground station connected to a NOC center and ground terminals via a multispot satellite, the network being composed of a coverage area composed of a plurality of cells in which terminals are located, each cell being associated with at least one link spot beam with the satellite to which a frequency band is allocated, the center including a determination module to determine the transmission parameters characteristic of the position of terminals in the coverage area, the parameters covering the entire coverage area and a transmitter to transmit all parameters to each of the terminals. Each of the terminals includes a storage device to store at least part of all the parameters, a positioning device to determine its geographic position in the coverage area and a processor to determine, from the parameters and its geographic position, the transmission parameters to be utilized.

Telecommunication network

A process for eliminating interference in a telecommunications network including a multi-beam satellite, a coverage area made up of a plurality of cells in which terminals are located, at least two of the cells, referred to as the first and second cell, being associated with the same frequency band, a first earth station including a first demodulator capable of demodulating signals transmitted by terminals located in the first cell and a second earth station including a second demodulator different from the first demodulator capable of demodulating signals transmitted by terminals located in the second cell. The process uses information supplied by the terminal, particularly its position and transmission parameters, and enables the appropriate G/T figure to be deduced. This information is then transmitted to the demodulator of the second earth station and will be used to reconstruct the signal incorporating the message and remove it from the received signal.

Growing community of inventors

Paris, France

Antonio Arcidiacono