France Telecom

Orange

3G Licensing S.a.

Rodolphe Legouable

Maryline Helard

Dinh Thuy Phan Huy

Pierre Siohan

Jean-Francois Helard

Vincent Le Nir

Chrislin Lele

Jean-Michel Auffray

Isabelle Siaud

Jean-Philippe Javaudin

Maurice Bellanger

Denis Callonnec

Jean-François Helard

A communications method executed by a node of a telecommunications network, the method includes: a training step including determining a 'transmission' filter as a function of a received training signal; and a data transmission step of transmitting data to a target node of the network while using the transmission filter as determined during the training step.

Method of communication in a co-operative network

A method and apparatus are provided for transmitting a source signal including a plurality of binary sequences to NR receiving antennas, where NR is no lower than 2. The method implements, for at least one first binary sequence of the source signal, pre-filtering for focusing a signal to be transmitted on at least one of the reception antennas, referred to as the target antenna. The target antenna and the associated focus pre-filtering step are selected according to a value of the first binary sequence intended for being considered as received. The method also includes transmitting the pre-filtered signal.

Method for transmitting a source signal, method for receiving a transmitted signal, corresponding transmitter, receiver, signal and computer programs

A method and apparatus are provided for transmitting a multicarrier spread-spectrum signal formed by a temporal succession of multicarrier symbols, using OQAM modulation and a plurality of inter-orthogonal spreading codes. The method includes spreading at least one complex-value data symbol, representative of a source data signal to be transmitted, over a set of sub-carriers of at least one multicarrier symbol, each of the sub-carriers modulating a complex value.

Methods for transmitting and receiving a multicarrier spread-spectrum signal, corresponding signal, computer program products and transmission and reception devices

A method is provided for transmitting a digital signal via n transmit antennas, wherein n is strictly greater than 2. The method includes combining with a source data vector n vectors to be transmitted respectively by each of the transmit antennas by a coding matrix &#x3c;I&#x3e;M&#x3c;/I&#x3e; with a yield equal to 1, using reference symbols known to at least one receiver whereby it is able to estimate at least three transmission channels corresponding respectively to each of the transmit antennas. The coding matrix &#x3c;I&#x3e;M&#x3c;/I&#x3e; applies a mathematical transformation to the reference symbols prior to the transmission thereof.

Method and device for transmitting a signal in a multi-antenna system, signal, and method for estimating the corresponding transmission channels

A method is provided for receiving a received signal corresponding to a multicarrier signal transmitted by at least one transmitter via a transmission channel. The multicarrier signal is formed by a temporal succession of symbols consisting of a set of data elements including informative data elements with real values, and pilots for at least some of the symbols. Due to groups of at least two pilots being respectively located in an adjacent region in the time/frequency space, the reception method includes a step of extracting at least two complex values corresponding the pilots of the group of the adjacent region, once they have passed through the transmission channel, and a step of estimating the transmission channel in the adjacent region on the basis of the complex values. The modulation used is the type of OFDM OQAM.

Methods for transmitting and receiving a multicarrier signal, carrying out a channel estimation, and corresponding devices and computer program products

A method for transmitting a digital signal via n transmit antennas, wherein n is strictly greater than 2, comprising the steps of combining with a source data vector n vectors to be transmitted respectively by each of the transmit antennas by a coding matrix &#x3c;I&#x3e;M&#x3c;/I&#x3e; with a yield equal to 1, using reference symbols known to at least one receiver whereby it is able to estimate at least three transmission channels corresponding respectively to each of said transmit antennas. Said coding matrix &#x3c;I&#x3e;M&#x3c;/I&#x3e; applied a mathematical transformation to the reference symbols prior to the transmission thereof.

The invention relates to a method of determining the time shift and/or the power of a received signal incorporating a reference sequence () and transmitted by multicarrier modulation on a set (M) of carriers spaced from each other by a distance n&#x394;f where n is a natural integer and &#x394;f is a constant. An inverse Fourier transform is applied to the phase variations between components of the signal carried by carriers separated by k&#x394;f for consecutive values of k in order to obtain the impulse response (RI) of the signal and the time shift &#x3c4;and/or the power of the received signal is/are determined from the impulse response by observation of the highest level amplitude peak.

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Cesson-Sevigne, France

Rodolphe Legouable