Patent
Satellite communications method and system with multi-beam precoding
TLDR
In this paper, a method for communicating from a plurality of gateways (10) to a satellite (14) over a set of uplink channels (12) and then towards Earth (22) in plurality of beams (20) is presented.Abstract:
The invention relates to a method for communicating from a plurality of gateways (10) to a satellite (14) over a set of uplink channels (12) and then towards Earth (22) in a plurality of beams (20). In that context, inter-beam interference mitigation precoding (s40) of signals intended to non-space-based receiver locations (18) is performed. At each gateway (10), precoding weightings are generated (s30) and uplink signals are transmitted (s32) to the satellite (14) in each of the uplink channels (12). At the satellite (14), the uplink signals are received (s34) from the gateways (10) over the uplink channels (12), and, for each uplink signal, a downlink signal (s36) is derived before transmitting (s38) the downlink signals towards Earth (22). In addition, constraints are defined to allow an effective inter-beam mitigation precoding processing. In other words, the method aims at providing system-wide precoding when more than one gateway is used. The invention also relates to a satellite (14), a system (100), and the use of the satellite (14).read more
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Proceedings ArticleDOI
Linear Precoding in Multibeam SatComs: Practical Constraints
TL;DR: The present article attempts to list the relevant issues, propose some possible ways forward and present some preliminary simulation results on multiuser precoding of the linear kind in DVB-S2-based HTS systems.
Perspectives of adopting interference mitigation techniques in the context of broadband multimedia satellite systems
TL;DR: In this paper, an overview of possible interference mitigation techniques applicable to broadband multimedia satellite systems is presented, where a multistar network architecture based on a multi-beam transparent satellite is considered and application of interference mitigation to both Forward Link (FL) and Reverse Link (RL) is discussed.
Patent
Multibeam satellite communication system and method, and satellite payload for carrying out such a method
TL;DR: In this paper, a satellite communication system comprising a multibeam satellite (SAT) for generating a plurality of feeder beams (FB 1 - FB N ) and a plurality user beams (UB 1 - UB K ) over a region of interest (ROI) is described, characterized in that it further comprises a control means (R 1 - R Mc ) for operating said gateway stations and a multi-beam satellite such that, in nominal conditions, N GW gateway stations exchange data with K user beams, each of the gateway stations allocating a fraction of its bandwidth to
Patent
Systems and methods for adaptive interference cancellation beamforming
TL;DR: In this paper, a transceiver including an antenna having a plurality of antenna feed elements is described, and the methods include receiving a plurality sample of a receive signal from the plurality of feed elements, estimating locations of a plurality source from the receive signal samples, identifying a plurality interference sources from among the plurality source samples, generating a plurality antenna feed element weights wM in response to the locations of the interference sources, and forming an antenna beam from the antenna to the geographic region using the antenna feed component weights wm, and communicating information over the antenna beam.
Patent
Joint transmitter signal processing in multi-beam satellite systems
Pantelis-Daniel Arapoglou,Alberto Ginesi,Giorgio Taricco,Dimitrios Christopoulos,Symeon Chatzinotas,Bjorn Ottersten,Miguel Angel Vazquez,Ana Isabel Pérez-Neira,Stefano Andrenacci,Alessandro Vanelli Coralli +9 more
TL;DR: In this article, the authors proposed a method and apparatus for wirelessly transmitting data to a plurality of terminals in each of a pluralityof beams through a multiplicity of transmit feeds, the method comprising: selecting, for each beam, two or more terminals among the plurality of nodes in the beam as a subgroup of nodes, on the basis of channel state information of the plurality nodes.