Montesinos, Julien and Besson, Olivier and Larue de Tournemine, Cécile Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage. (2011) IET Communications, vol. 5 (n° 3). pp. 350-361. ISSN 1751-8628
(Document in English)
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Official URL: http://dx.doi.org/10.1049/iet-com.2009.0721
Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam, and the users can be very geographically dispersed. This is achieved through the use of a large direct radiating array (DRA) coupled with adaptive beamforming so as to reject interferences and to provide a maximal gain to the user of interest. New fast-converging adaptive beamforming algorithms are presented, which allow to obtain good signal to interference and noise ratio (SINR) with a number of snapshots much lower than the number of antennas in the array. These beamformers are evaluated on reference scenarios.
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