Abstract: 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; and puncturing data after encoding; modulating with mapping of the data, after puncturing, on one of M symbols of a constellation having order M, where M=2q, q>=2. The method is such that the puncturing of the data differs according to the position of the symbol in the constellation on which these data are mapped after puncturing.

Abstract: A telecommunications system including: an encoder for encoding input data; and a puncturer for puncturing the data according to at least two protection levels after encoding. The puncturer includes an elementary structure comprising a first puncturing matrix of which an output feeds a demultiplexer having a first and a second output, the second output feeding a second puncturing matrix in order to define the at least two different levels of protection obtained respectively with the first output of the demultiplexer and an output of the second puncturing matrix.

Abstract: 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.

Abstract: 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.

Abstract: 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. Different frequency channel allocation techniques exist for transmissions.

Abstract: A method for selecting a mode of transmission for a first telecommunication entity of a communication signal to a second telecommunication entity, each mode determining a physical bitrate. The method includes: determining for a given mode a first metric corrected by a second metric, the first metric measuring at a given distance d a relative degradation by the medium for transmitting the signal resulting from a relative degradation linked to a multipath effect at the link level with respect to a Gaussian channel and from a relative degradation linked to an effect of attenuation of the medium with respect to a model of attenuation in free space, the second metric determining a ratio between a mean bitrate and the physical bitrate for this mode of transmission; comparing for various modes of transmission, values of the first metric corrected to select at least one mode of transmission for distance d.

Abstract: A method for selecting a mode of transmission for a first telecommunication entity of a communication signal to a second telecommunication entity, each mode determining a physical bitrate. The method includes: determining for a given mode a first metric corrected by a second metric, the first metric measuring at a given distance d a relative degradation by the medium for transmitting the signal resulting from a relative degradation linked to a multipath effect at the link level with respect to a Gaussian channel and from a relative degradation linked to an effect of attenuation of the medium with respect to a model of attenuation in free space, the second metric determining a ratio between a mean bitrate and the physical bitrate for this mode of transmission; comparing for various modes of transmission, values of the first metric corrected to select at least one mode of transmission for distance d.

Abstract: 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 ? of the channel.

Abstract: 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 ? of the channel.

Abstract: 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.

Abstract: 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.

Abstract: 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 ? 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 ? for different modes in order to select at least one transmission mode.

Abstract: A method is provided for mapping data symbols at the input of a multi-carrier modulator, which data symbols are interleaved in blocks of K symbols, into sub-channels of size equal to NSDC consecutive carriers scattered to one or more multi-carrier symbols, NSDC being a sub-multiple of K. The size NSDC of the sub-channels is determined as a function of a symbol interleaving pattern diversity between sub-channels.

Abstract: 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.

Abstract: An interleaving method (2) and an interleaver (9) for frequency interleaving data symbols. The data symbols are for allocation to carriers in a set of NFFT carriers of a module for multiplexing and modulation by orthogonal functions in a multicarrier transmitter device (3). 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 NFFT.

Abstract: The present invention relates to a time interleaving method (1) 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.

Abstract: 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.

Abstract: 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 ? 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 ? for different modes in order to select at least one transmission mode.

Abstract: A method and a device (4) 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?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(j)(k) at the output of the interleaver (4) 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.

Abstract: A method is provided for mapping data symbols at the input of a multi-carrier modulator, which data symbols are interleaved in blocks of K symbols, into sub-channels of size equal to NSDC consecutive carriers scattered to one or more multi-carrier symbols, NSDC being a sub-multiple of K. The size NSDC of the sub-channels is determined as a function of a symbol interleaving pattern diversity between sub-channels.