Exploració per autor "Vázquez, Miguel Ángel"
Ara es mostren els items 1-17 de 17
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Autonomous design for the MISO interference channel
Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Vázquez, Miguel Ángel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper investigates the power control and beamforming design in the MISO-IC (Multiple Input Single Output-Interference Channel) when constraints are placed at the receivers’ input power. In this way regulatory ... -
Confidential communication in downlink beamforming
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2012)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper deals with the problem of secure transmission in downlinkbeamforming. In this scenario, a base station, which usually serves information to an amount of users, wants to transmit a confidential message to one ... -
Distributed power control with received power constraints for time-area-spectrum licenses
Pérez Neira, Ana Isabel; Veciana Fontanet, Joaquim Maria; Vázquez, Miguel Ángel; Lagunas, Eva (2016-03)
Article
Accés obertThis paper deals with the problem of optimal decentralized power control in systems whose spectrum is regulated in time and space, the so-called time-area-spectrum (TAS) licensed. This license system gives to the owner the ... -
Generalized multicast multibeam precoding for satellite communications
Joroughi, Vahid; Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel (2017-02-01)
Article
Accés obertThis paper deals with the problem of precoding in multibeam satellite systems. In contrast to general multiuser multiple-input-multiple-output cellular schemes, multibeam satellite architectures suffer from different ... -
Joint temporal-spatial reference beamforming: EIG beamforming
Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel; Vázquez, Miguel Ángel (2010)
Text en actes de congrés
Accés obertTraditional methods for beamforming can be grouped in two families, the time reference beamformer and the spatial reference beamforming. Nevertheless, the increasing demand on receivers for location systems and high bandwidth ... -
Linear precoding in multibeam satellite under licensed shared access
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialDue to the scarcity of the spectrum, there is a current tendency to offer novel shared access licenses in order to increase the overall spectral efficiency. Under this context, license shared access (LSA) has appeared as ... -
NOMA and interference limited satellite scenarios
Caus, Marius; Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés obertThis paper deals with the problem of non-orthogonal multiple access (NOMA) in multibeam satellite systems, where the signals are jointly precoded. It is considered that the number of frames that are simultaneously ... -
On-board beam generation for multibeam satellite systems
Joroughi, Vahid; Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Devillers, Bertrand (2017-03-27)
Article
Accés obertThis 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 ... -
Open spectrum communication systems and optimized downlink beamforming
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2012)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper addresses the problem of transmit beamforming in open spectrum communication systems. In these scenarios, the operator or the data communication provider delivers a set of base stations to the final users ... -
Performance analysis of joint precoding and MUD techniques in multibeam satellite systems
Vázquez, Miguel Ángel; Caus, Marius; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés obertThis paper considers interference mitigation techniques in the forward link of multibeam satellite systems. In contrast to previous works, either devoted to receiver interference mitigation (e.g. multiuser detection) or ... -
Phase only transmit beamforming for spectrum sharing microwave systems
Vázquez, Miguel Ángel; Blanco, Luis; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertThis paper deals with the problem of phase-only transmit beamforming in spectrum sharing microwave systems. In contrast to sub-6 GHz schemes, general microwave systems require a large number of antennas due to its huge ... -
Precoding in multibeam satellite communications: present and future challenges
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Christopoulos, Dimitrios; Chatzinotas, Symeon; Ottersten, Bjorn; Arapoglou, Pantelis-Daniel; Ginesi, Alberto; Tarocco, Giorgio (2016-12-01)
Article
Accés obertWhenever multibeam satellite systems target very aggressive frequency reuse in their coverage area, inter-beam interference becomes the major obstacle for increasing the overall system throughput. As a matter of fact, users ... -
Regulation and research on wireless communications
Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel; Vázquez, Miguel Ángel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper describes wh ich are the major changes would occur in regulation policies and role of the regulation bodies due to the advance of technology development, research and innovation in telecommunications. The ... -
Robust multibeam satellite systems for underlay licensed shared access
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper deals with the problem of multibeam satellite precoding design under spectrum sharing constraints. These regulation restrictions allow the coexistence with other wireless services such as terrestrial mm-wave ... -
Space-time ML receiver and its reciprocal transmitter design for interference networks
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper examines a type of linear beamforming for communications in interference networks. First, a receiver beamformer design is derived from a Maximum Likelihood (ML) framework with Automatic Gain Control (AGC) ... -
The challenge of the multiantenna-IC and practical solutions for the MISO case
Pérez Neira, Ana Isabel; Vázquez, Miguel Ángel; Lagunas Hernandez, Miguel A. (2010)
Presentació
Accés obertThe interference channel (IC) models a network of simultaneous communication node pairs. Interference is not a fundamental limitation: IA (interference alignment) is cooperative and not selfish. It avoids MUD. What about ... -
Transmit beamforming for the MISO Interference Channel with asymmetric link gains
Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2012)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper proposes a transmit beamforming technique to cope with the problem of the Multiple Input Single Out- put Interference Channel (MISO IC). In this scenario, the achievable sum-rate is highly conditioned by the ...