2026-04-13T02:32:23Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1067402026-02-07T12:04:52Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Joroughi, Vahid author Vázquez, Miguel Ángel author Pérez Neira, Ana Isabel author Devillers, Bertrand author 2017-03-27 This paper aims at designing an onboard beam generation process for a hybrid onboard on-ground multibeam satellite architecture. The proposed method offers a good tradeoff between total throughput and feeder link bandwidth requirements compared with pure on-ground systems. Full frequency reuse among beams is considered, and the beamforming at the satellite is designed for supporting interference mitigation techniques. In addition, in order to reduce the payload cost and complexity, this onboard beamforming is assumed to be constant and the same for forward and return link transmissions so that the same array-fed reflector can be used for forward and return links, leading to a substantial reduction of the payload mass. To meet all these requirements, a novel robust minimum mean square error optimization is conceived. The benefits of the considered scheme are evaluated with respect to the current approaches both analytically and numerically. Indeed, we show that with the DVB-RCS and DVB-S2 standards, our proposal allows increasing the total throughput within a range between 6% and 15% with respect to other onboard processing techniques in the return and forward link, respectively. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors Artificial satellites in telecommunication Wireless communication systems Multibeam satellite systems On-board beam processing Linear precoding DVB-S2 DVB-RCS Satèl·lits artificials en telecomunicació Comunicació sense fil, Sistemes de On-board beam generation for multibeam satellite systems