European Space Agency

Universite Du Luxembourg

Symeon Chatzinotas

Alberto Ginesi

Bjorn Ottersten

Ana Isabel Perez-Neira

Giorgio Taricco

Pantelis-Daniel Arapoglou

Björn Ottersten

Miguel Angel Vazquez

Stefano Andrenacci

Alessandro Vanelli Coralli

Maha Alodeh

Danilo Spano

Dimitrios Christopoulos

Ana Isabel Pérez-Neira Pérez-Neira

Miguel ÁNgel Vázquez Vázquez

Ana Isabel PÉREZ-Neira

Miguel ÁNgel VÁZQUEZ

Alessandro Vanelli Coralli Coralli

The invention provides a method and device for sending K data messages simultaneously from a data transmission device to K receivers, over a Multiple Input Single Output, MISO, channel. The transmitter uses a Faster-than-Nyquist signaling rate. By making use of spatio-temporal channel interference model at the transmitter, the benefits of FTN in terms of effective rate and energy efficiency do not come at the expense of increased receiver complexity.

Spatio-temporal precoding for faster-than-Nyquist signal transmissions

A, method and apparatus for wirelessly transmitting data to a plurality of terminals in each of a plurality of beams through a plurality of transmit feeds includes selecting, for each beam, two or more terminals among the plurality of terminals in the beam as a subgroup of terminals, on the basis of channel state information of the plurality of terminals; determining, for each beam, equivalent channel state information representing the subgroup of terminals in the beam on the basis of the channel state information of the terminals of at least one of the plural subgroups of terminals; and determining a set of weight coefficients that relate the plurality of transmit feeds to a plurality of signals that are intended for transmission in the plurality of beams on the basis of the equivalent channel state information representing the plural subgroups of terminals. Also disclosed is a method and apparatus for receiving data transmitted via wireless transmission to a plurality of beams through a plurality of transmit feeds and estimating a channel on the basis of the received data. The present disclosure is advantageously applicable to satellite communication systems.

Joint transmitter signal processing in multi-beam satellite systems

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Symeon Chatzinotas