Thomson Licensing

Institut Telecom/telecom Paristech

Samuel Guillouard

Patrick Fontaine

Vincent Demoulin

Patrick Lopez

Charline Guguen

Olivier Mocquard

Renaud Dore

Franck Thudor

Jean-Yves Le Naour

Ghaya Rekaya-Ben Othman

Thomas Schwanenberger

Eric Auffret

Jacques Perraudeau

Abdellatif Salah

The invention relates to a device for transmission in a wireless network comprising a plurality of base stations and at least one mobile terminal, a mobile terminal (MT) transmitting a same signal () intended for the plurality of base stations (BS, BS, BS). In order to optimize the synchronization of the mobile terminal with the plurality of base stations, the method comprises a step of transmission of an item of information representative of a first temporal offset intended for the mobile terminal, the first offset being according to at least one reception time () of the first signal by at least one base station (BS, BS, BS). The invention also relates to the corresponding device for reception.

Method for reception in a wireless network and corresponding device for reception

The invention relates to a method for transmission in a wireless network comprising a plurality of base stations and at least one mobile terminal, a mobile terminal (MT) transmitting a same signal () intended for the plurality of base stations (BS,BSBS). In order to optimise the synchronisation of the mobile terminal with the plurality of base stations, the method comprises a step of transmission of an item of information representative of a first temporal offset intended for the mobile terminal, the first offset being according to at least one reception time () of the first signal by at least one base station (BS,BS,BS).

Transmission method in a wireless network and corresponding reception method

The invention relates to a method for transmitting in a wireless network comprising a plurality of base stations, that transmit frames at a same frequency, and at least one mobile terminal. In order to optimise the size of a frame header, the method comprises: The invention also relates to the corresponding method for reception.

Transmission method for a wireless network and corresponding reception method

In order to improve the quality of transmission and reception of data packets, the method of transmission using several antennas comprises: The method of reception comprises a mapping of different frequency channel to reception antennas.

Method of adaptive frequency assignment to a plurality of antennas

The invention relates to a method for transmission of data in a wireless network comprising a plurality of base stations broadcasting data at a same frequency and a plurality of mobile terminals. In order to overcome inter-cell transfer at the level of mobile terminals, the method comprises: The invention also relates to the corresponding method for reception of data.

Method for transmission of data and method for corresponding reception

A method of decoding a data signal includes progressively constructing a decoding tree, implementing at least two iterations of the following steps: selecting at least one child node of a current node belonging to a selection interval; storing the child nodes in a first stack; deleting the current node from the first stack; selecting a new current node from the first stack; and if the new current node is a leaf node, storing the path between the root node and the leaf node, in the second stack, and deleting the leaf node from the first stack; otherwise, return to the step of selecting a child node for the new current node. Moreover, the method assigns a probability of likelihood to the bits of at least one symbol of the data signal, taking account of the paths stored in the second stack, and determines a probabilistic estimation of the signal.

Method of decoding a signal implementing a progressive construction of a decoding tree, corresponding computer program and decoding device

The invention concerns a method for receiving a multi-carrier signal of reduced complexity when the number of carriers is not high. The method includes: demodulating the multi-carrier signal; converting a received signal received in binary representation into a modal representation in a base of at least two mutually prime numbers on a finite space of size equal to the product of the mutually prime numbers; demodulating including conversion.

Method for receiving a multi-carrier signal, transmission method, corresponding receiver and transmitter

The gain control method for the RF and IF amplification stages of a bursty data frame reception system enables, following a step for evaluating the received signal strength, the gain adjustment step of the RF amplification stage to be temporarily deferred until a frame structure symbol is received, during which the gain adjustment step of the IF amplification stage takes place simultaneously with that of the RF gain, while retaining an overall gain linearly dependent on the input signal strength. The corresponding device comprises a control elementwhich generates the control signal for the RF and IF gain amplifiers

Gain control method and device for a bursty data frame reception system

A method and device for evaluating a received signa1 in a data-receiving system using multi-carrier modulation are provided. A confidence indicator is determined for each data item received so as to provide a stream of confidence indicators parallel to the datastream received. The confidence indicators are ordered identical to the data received. A device for evaluating a confidence indicator for each carrier and a device for laying out a stream of confidence indicators identical to a datastream received are provided.

Method and device for selecting an antenna for receipt of a multi-carrier signal

Method of adjustment of a receiver of signals transmitted in bursts in a system where the communications are set up within the context of successive frames comprising slots allocatable to the transmitters for their communications with the receivers. The adjustment of at least one characteristic of the receiver allows it to adapt upon the arrival of the bursts, by taking account of at least one reinitialization parameter for a first burst or adjustment parameter computed by a computation unit () from the preamble of the burst currently being received. At least one specified adjustment parameter is determined by a computation unit (), for a new burst of a communication, by taking into account the part of the signal corresponding to the payload of the burst previously received for this communication, if the new is separated from this previously received burst only by a time which is less than a silence threshold value.

Method of adjustment for receiver of signals transmitted in bursts and corresponding receivers

The method is applicable to a receiver () of signals corresponding to packets of digital data transmitted in bursts, which comprises an analogue pickup subassembly () connected to a digital processing subassembly () by means for converting analogue signals into digital signals (). Gain adjustment means () act on the amplification means () in order to alter the power of signals supplied to the conversion means. The method provides a preadjustment of the gain, in the absence of a burst, for detecting the arrival of signals even if they are weak, and an adjustment of the gain as a function of a power value of the signal determined from burst start symbols, as obtained after conversion. This adjustment is dependent on the recognition of symbols scheduled at the start of a burst, it is carried out during a time scheduled for a symbol otherwise left unexploited by the method.

Gain control method for a receiver of signals transmitted in bursts and receiver exploiting it

The invention pertains to a method of positioning antennas with sectorization in a data transmission system. The method makes it possible to search, by successive approximations, for the sector of each antenna allowing optimal reception of the information. The search step is repetitive.

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Chantepie, France

Samuel Guillouard