Thales

Centre National De La Recherche Scientifique

Institut National Polytechnique De Toulouse

Centre National Detudes Spatiales

Centre National D'etudes Spatiales Paris, France

Institut Superieur De L'aeronautique Et De L'espace Toulouse, France

Tesa Telecom Spatiales Aeronautiques

Institut Superieur De L'aeronautique Et De L'espace

Marie-Laure Boucheret

Charly Poulliat

Benjamin Gadat

Mathieu Gineste

Jérôme Lacan

Hanaa Al Bitar

Jean-Baptiste Dupe

Marion Aubault

Antonio Cipriano

Selma Zamoum

Lorenzo Ortega Espluga

Bilel Raddadi

Nathalie Thomas

Tarik Benaddi

Cecile Guiraud

Serdar Sahin

A method for transmitting data packets through a random-access (RA) transmission channel shared by a plurality of user terminals uses and exploits a function F for assigning and distributing transmission resources F(u) to the user terminals, knowledge of the graph of which is shared by the sending user terminals and the receiving station in a preliminary step. During the decoding of the received packets, the graph {(u, F(u)} of the assigning and distributing function is exploited by the receiving station to minimize, or even to decrease to zero, the number of replica-location correlations required in case of failure of the conventional CRD-SA protocol decoding process.

Method and system for transmitting data packets via a random access (RA) transmission channel

A new unequal-error-protection method that is based on using a particular parity-check-matrix structure for LDPC codes.

LDPC coding with differentiated protection

A method for equalizing a signal comprising modulated symbols comprising a block of N received symbols comprises: demultiplexing the N received symbols by factor L to generate a predetermined number L of sub-blocks of symbols, each comprising a version of the N received symbols sub-sampled by factor L, the independent equalization of each sub-block using an identical equalization algorithm, multiplexing the equalized symbols of each sub-block to obtain a block of N equalized symbols, removing instances of interference linked to paths other than two paths of higher power comprising generating an interference term resulting from the influence, on the equalized symbols, of all paths of the channel having the impulse response of the transmission channel except two paths of higher power, subtracting the interference term from the symbols of the block of N received symbols, and, a second equalization step equal to a second iteration of the first equalization step.

Equalization method for a parsimonious communication channel and device implementing the method

A method for generating a filter bank for receiving a signal modulated by continuous phase modulation, the modulated signal being able to be broken down as a sum of a plurality of amplitude-modulated signals, each amplitude-modulated signal being expressed by a product between a complex pseudo-symbol and a temporal component with a waveform predefined according to the parameters of the modulation, includes: evaluating, over a duration (T) that is equal to the duration of a symbol, all waveforms of the signal from the parameters of the continuous phase modulation and the breakdown in the form of a sum of a plurality of amplitude-modulated signals, retaining all evaluated waveforms that are different from one another, constructing a filter bank made up of a plurality of filters whose temporal responses are equal to the retained waveforms, which are limited to a duration equal to the duration of a symbol.

Method for generating a filter bank for receiving a signal modulated by continuous phase modulation, and method for receiving said signal

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Toulouse, France

Marie-Laure Boucheret