France Telecom

Orange

Anne-Marie Ulmer-Moll

Isabelle Siaud

Marc-Antoine Bouzigues

Different frequency channel allocation techniques exist for transmissions. These frequency channel allocation techniques do not explicitly take into account the position of the terminal equipment and the antenna characteristics associated therewith. In addition, these techniques consume significant calculation power in order for the frequency channels to be allocated in the best possible way between the various terminal devices. The communication method is based on the selection of a single current transmission frequency using a metric referred to as metric representative of an overlap of collecting surfaces. The overlap metric evaluates an interference level associated with a spatial overlap between collecting surfaces of a first terminal device and an interfering device for a radio signal transmission frequency.

Method for allocating radio signal transmission frequencies between one or more communication entities, allowing a reduction in interferences between the communication entities using the same frequency channel

A data transmission method implemented by a first item of telecommunication equipment transmitting to a second item of telecommunication equipment. The method includes: encoding input data by using an encoder; puncturing data after encoding; modulating with mapping of the data, after puncturing, on one symbol among M symbols of a constellation having order M, where M=2q,≥2, each symbol of the constellation comprising at least two bits having different weights; and transmitting the data, after mapping, to the second item of equipment. The method is such that, for at least one of the M symbols, the puncturing of the data differs according to the weight of the bits in the symbol on which these data are mapped.

Method for transmitting data with variable puncturing within a constellation symbol

A link adaptation method uses a selection criterion for selecting a transmission mode for transmitting PPDU frames over a channel of a telecommunications system. The system includes an access point and a plurality of stations having various different transmission modes associated with different data rates. Access to the channel being of the random type. The selection makes use of a time occupancy metric &#x3b3; of the channel.

Method for adapting a link for selecting a frame transmission mode and corresponding WI-FI access point

A method and apparatus are provided for locating an obstacle between a transmitter and a receiver. The method includes: determining at least one elliptical ring in which the obstacle is situated, the elliptical ring being defined by two confocal ellipses, having their focuses corresponding to the transmitter and to the receiver, each elliptical ring being associated with a physical echo generated by an obstacle; estimating a distance between the obstacle and a focus as a function of the separation between the confocal ellipses at the obstacle in a plane normal to the axis defined by the focuses so as to obtain a set of potential location zones for the obstacle in the elliptical ring; and lifting the ambiguity between the various potential location zones of the obstacle so as to deliver a location zone of the obstacle.

Method and a device for locating at least one obstacle in a communications network, a corresponding computer program

A method and device are provided for selecting a transmission mode, for a first telecommunications entity having a plurality of different modes for transmitting a communications signal to a second telecommunications entity. The various transmission modes provide the same data rate D. The method includes: for a given transmission mode, determining the value of a first metric &#x3b1; that measures degradation relating to a given distance d stemming from the transmission medium of the communications signal for a given environment compared with a reference model for the transmission medium, as a result of a multi-path effect and/or of an attenuation effect of the transmission medium; and comparing values of the metric &#x3b1; for different modes in order to select at least one transmission mode.

Method for selecting a transmission mode

An interleaving method () and an interleaver () for frequency interleaving data symbols. The data symbols are for allocation to carriers in a set of Ncarriers of a module for multiplexing and modulation by orthogonal functions in a multicarrier transmitter device (). A block of Npm successive data symbols is interleaved in application of an interleaving law that varies over time for a given transmission mode of the transmitter device, where Npm is less than or equal to N.

Dynamic interleaving method and device

The present invention relates to a time interleaving method () and a time interleaver (ETS) for data. The data is intended to be transmitted sequentially by a baseband carrier of a single-carrier transmitter (EM). The method consists in interleaving a block of successive data items according to a particular interleaving law variable in time for a given transmission mode of the transmitter.

Dynamic time interleaving method and an associated device

A method and a device () for block interleaving of size K with N iterations of index j, N being greater than or equal to 1, of input digital data items indexed by a variable k={0, . . . , K&#x2212;1}. The interleaving method uses a turbo structure that has two inputs and one output. At the end of each iteration j, the interleaving law I(k) at the output of the interleaver () is modified in accordance with an input sequence formed by the position indices of the data items before interleaving (typically a ramp) and in accordance with an interleaved sequence (which provides the position of the data items after interleaving) resulting from the previous iteration of the same interleaving algorithm.

Interleaving with iterative calculation of interleaving addresses

An interleaving method () and a frequency interleaver (EF) of data symbols. The data symbols are for allocation to carriers of a set of Ncarriers of a module for multiplexing and modulation by orthogonal functions in a multicarrier transmitter device (EM). The method includes selecting in time-varying manner from the set of carriers, carriers that are dedicated to transmitting data symbols and in dynamically interleaving a block of carriers constituted by the selected carriers and by null carriers.

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Rennes, France

Anne-Marie Ulmer-Moll