Patents by Inventor Ana Isabel Pérez Neira
Ana Isabel Pérez Neira has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10270520Abstract: 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.Type: GrantFiled: April 14, 2015Date of Patent: April 23, 2019Assignee: European Space AgencyInventors: Pantelis-Daniel Arapoglou, Alberto Ginesi, Giorgio Taricco, Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten, Miguel Angel Vazquez, Ana Isabel Perez-Neira, Stefano Andrenacci, Alessandro Vanelli Coralli
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Publication number: 20170149493Abstract: 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.Type: ApplicationFiled: April 14, 2015Publication date: May 25, 2017Inventors: Pantelis-Daniel Arapoglou, Alberto Ginesi, Giorgio Taricco, Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten, Miguel Angel Vazquez, Ana Isabel Perez-Neira, Stefano Andrenacci, Alessandro Vanelli Coralli
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Publication number: 20170070280Abstract: A method and system provide diversity in polarization of antennas, called here Polarized Modulation (PM), and include a receiver with a single receiving antenna, which is double polarized for receiving a signal y to obtain b+1 bits of information from a symbol s transmitted by a double-polarized single transmitting antenna. The receiver includes an estimator block for estimating the additional bit e to determine whether a first polarization or a second polarization is used in the transmission, in order to recover the b+1 bits of information. The PM exploits Spatial Modulation (SM), but applied for Polarization instead of antennas, in mobile and fixed satellite communications, ensuring an increase of throughput while guaranteeing a minimum increase in power usage and a given required QoS.Type: ApplicationFiled: January 30, 2014Publication date: March 9, 2017Inventors: Pol HENAREJOS HERNANDEZ, Ana Isabel Perez Neira
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Patent number: 8441932Abstract: Method of efficiently allocating a downlink channel from a transmitter (1) to one user selected from a plurality of users (30-1, 30-2, . . . 30-N) in a wireless network providing different service applications to said users (30-1, 30-2, . . . 30-N), which comprises the steps of: at a DLC queue (221) of said transmitter (1), ranking (21, 220) a plurality of M application layer packets to be transmitted to said plurality of users (30-1, 30-2, . . . 30-N), said ranking being based on a quality of service demand associated to each application layer packet, said quality of service demands being in turn associated to respective classes of applications (C1, C2, C3, C4), said DLC queue (221) having length M, M being a natural number, said M packets corresponding to P users of said plurality of users (30-1, 30-2, . . . 30-N), wherein P?M.Type: GrantFiled: June 2, 2008Date of Patent: May 14, 2013Assignee: Fundacio Privada Centre Tecnologic de Telecomunicacions de CatalunyaInventors: Nizar Zorba Barah, Christos Verikoukis, Ana Isabel Perez-Neira
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Patent number: 8310980Abstract: Method for assigning a precoding beam forming scheme in a broadband satellite system, wherein said broadband satellite system comprises a multibeam satellite (1) having a plurality of antennas and a plurality of satellite beams, a gateway (2) and a number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ), and wherein said gateway (2) is configured for processing and serving a plurality of K beams of said plurality of satellite beams towards said number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ), wherein K<N, and wherein said assignation of a precoding beam forming scheme comprises a joint processing over said plurality of K beams. Said precoding beam forming scheme is dependent: on the radiation pattern of said satellite antennas; on the line of sight channel characteristics and on the multiuser diversity caused by said number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ).Type: GrantFiled: October 15, 2007Date of Patent: November 13, 2012Assignee: Fundacio Privada Centre Tecnologic de Telecomunicacions de CatalunyaInventors: Nizar Zorba Barah, Marc Realp Campalans, Ana Isabel Perez-Neira
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Patent number: 8208952Abstract: Method for allocating a minimum downlink power from a transmitter (1) having nt transmit antennas of a cellular multi-user multi-antenna communications system with N users attached to said transmitter (1). Each user comprises at least one antenna. The method comprising the steps of: generating at said transmitter (1) M random beams (b1 . . . bM); sending said M random beams through all the transmit antennas; calculating at each user a signal-to-noise-interference-ratio for each random beam sent by said transmitter (1); sending back to said transmitter (1) said calculated values of signal-to-noise-interference-ratio, said signal-to-noise-interference-ratio representing a partial channel state information; selecting at said transmitter (1) the M best users which correspond to the M best values of signal-to-noise-interference-ratio per beam.Type: GrantFiled: June 28, 2007Date of Patent: June 26, 2012Assignee: Fundacio Privada Centre Tecnologic de Telecomunicacions de CatalunyaInventors: Nizar Zorba Barah, Ana Isabel Perez Neira
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Publication number: 20100329119Abstract: Method of efficiently allocating a downlink channel from a transmitter (1) to one user selected from a plurality of users (30-1, 30-2, . . . 30-N) in a wireless network providing different service applications to said users (30-1, 30-2, . . . 30-N), which comprises the steps of: at a DLC queue (221) of said transmitter (1), ranking (21, 220) a plurality of M application layer packets to be transmitted to said plurality of users (30-1, 30-2, . . . 30-N), said ranking being based on a quality of service demand associated to each application layer packet, said quality of service demands being in turn associated to respective classes of applications (C1, C2, C3, C4), said DLC queue (221) having length M, M being a natural number, said M packets corresponding to P users of said plurality of users (30-1, 30-2, . . . 30-N), wherein P?M.Type: ApplicationFiled: June 2, 2008Publication date: December 30, 2010Applicant: FUNDACIO PRIVADA CENTRE TECNOLOGIC DE TELECOMMUNICInventors: Nizar Zorba Barah, Christos Verikoukis, Ana Isabel Perez-Neira
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Publication number: 20100303002Abstract: Method for assigning a precoding beam forming scheme in a broadband satellite system, wherein said broadband satellite system comprises a multibeam satellite (1) having a plurality of antennas and a plurality of satellite beams, a gateway (2) and a number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ), and wherein said gateway (2) is configured for processing and serving a plurality of K beams of said plurality of satellite beams towards said number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ), wherein K<N, and wherein said assignation of a precoding beam forming scheme comprises a joint processing over said plurality of K beams. Said precoding beam forming scheme is dependent: on the radiation pattern of said satellite antennas; on the line of sight channel characteristics and on the multiuser diversity caused by said number N of satellite terminals (ST11, ST12 . . . ST21, ST22, ST23 . . . STK1, STK2 . . . ).Type: ApplicationFiled: October 15, 2007Publication date: December 2, 2010Applicant: FUNDACIO PRIVADA CENTRE TECHOLOGIC DE TELECOMMUNIC ACIONS DE CATALUNYAInventors: Nizar Zorba Barah, Marc Realp Campalans, Ana Isabel Perez-Neira
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Publication number: 20100182967Abstract: Method for allocating a minimum downlink power from a transmitter (1) having nt transmit antennas of a cellular multi-user multi-antenna communications system with N users attached to said transmitter (1). Each user comprises at least one antenna. The method comprising the steps of: generating at said transmitter (1) M random beams (b1 . . . bM); sending said M random beams through all the transmit antennas; calculating at each user a signal-to-noise-interference-ratio for each random beam sent by said transmitter (1); sending back to said transmitter (1) said calculated values of signal-to-noise-interference-ratio, said signal-to-noise-interference-ratio representing a partial channel state information; selecting at said transmitter (1) the M best users which correspond to the M best values of signal-to-noise-interference-ratio per beam.Type: ApplicationFiled: June 28, 2007Publication date: July 22, 2010Inventors: Nizar Zorba Barah, Ana Isabel Perez Neira
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Patent number: 7043203Abstract: The invention discloses a process for re-transmitting single frequency signals and a single frequency signal repeater, where coupling occurs between the transmitting antenna and the receiving antenna, and where the process is of the type used in a single frequency signal repeater and comprises the steps of: [a] receiving a first radio frequency signal having a particular receiving power, [b] optionally converting said first radio frequency signal into a process signal, [c] filtering, amplification and automatically controlling the gain of said signal, [d] canceling said coupling between said transmitting antenna and said receiving antenna, [e] reconverting, as the case may be, said process signal into a second radio frequency signal, [f] amplifying the power of said second radio frequency signal, [g] output filtering, and [g] transmission.Type: GrantFiled: February 8, 2001Date of Patent: May 9, 2006Assignee: Mier Comunicaciones, S.A.Inventors: Xavier Barba Miquel, Domènec Iborra Archs, Pedro Mier Albert, Maria Meritxell Lamarca Orozco, Montserrat Nájar Marton, Ana Isabel Pérez Neira, Gregori Vázquez Grau
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Publication number: 20030022626Abstract: The invention discloses a process for re-transmitting single frequency signals and a single frequency signal repeater, where coupling occurs between the transmitting antenna and the receiving antenna, and where the process is of the type used in a single frequency signal repeater and comprises the steps of: [a] receiving a first radio frequency signal having a particular receiving power, [b] optionally converting said first radio frequency signal into a process signal, [c] filtering, amplification and automatically controlling the gain of said signal, [d] canceling said coupling between said transmitting antenna and said receiving antenna, [e] reconverting, as the case may be, said process signal into a second radio frequency signal, [f] amplifying the power of said second radio frequency signal, [g] output filtering, and [g] transmission.Type: ApplicationFiled: August 16, 2002Publication date: January 30, 2003Inventors: Xavier Barba Miquel, Domenec Ibbora Archs, Pedro Mier Albert, Maria Maritxell Lamarca Orozco, Montserrat Najar Marion, Ana Isabel Perez Neira, Gregori Vazquez Grau