Patents by Inventor Hikmet Sari

Hikmet Sari 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).

  • Publication number: 20190306001
    Abstract: A method of transmission for increasing communication channel capacity comprising superposing a first signal on a portion of a second signal to form a combined signal, wherein the first signal comprises a repetition coded signal, and transmitting the combined signal. Also disclosed is a method of receiving a combined signal for increasing communication channel capacity comprising performing threshold detection on the combined signal wherein the combined signal comprises a first signal comprising a repetition coded signal superposed on a portion of a second signal and the threshold detection enables derivation of the second signal and the first signal prior to repetition coding.
    Type: Application
    Filed: March 27, 2018
    Publication date: October 3, 2019
    Inventor: Hikmet Sari
  • Patent number: 10243776
    Abstract: A method of spatially multiplexing data comprising a signal vector, the method comprising selecting first and second modulation schemes for the data transmission wherein the second modulation scheme is an interpolation in the plane of the first modulation scheme; and further wherein the modulation schemes are selected so as to maintain the same minimum Euclidean distance between vectors comprising the first and second modulation schemes as the minimum Euclidean distance within the first and second modulation schemes; and selecting a plurality of antennae, each of the plurality to concurrently transmit respective symbols of the signal vector.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 26, 2019
    Assignee: Sequans Communications S.A.
    Inventors: Hikmet Sari, Serdar Sezginer
  • Publication number: 20170126463
    Abstract: A method of spatially multiplexing data comprising a signal vector, the method comprising selecting first and second modulation schemes for the data transmission wherein the second modulation scheme is an interpolation in the plane of the first modulation scheme; and further wherein the modulation schemes are selected so as to maintain the same minimum Euclidean distance between vectors comprising the first and second modulation schemes as the minimum Euclidean distance within the first and second modulation schemes; and selecting a plurality of antennae, each of the plurality to concurrently transmit respective symbols of the signal vector.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 4, 2017
    Inventors: Hikmet Sari, Serdar Sezginer
  • Patent number: 9432097
    Abstract: A method of transmitting data comprising choosing a transmit modulation scheme of the transmission, choosing a transmit parameter of the transmission, transmitting the data stream according to the chosen transmit modulation and transmit parameter such that data of the data stream is transmitted by the modulation scheme and the choice of transmit parameter.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 30, 2016
    Assignee: Sequans Communications S.A.
    Inventors: Serdar Sezginer, Hikmet Sari
  • Publication number: 20150349858
    Abstract: A method of transmitting data comprising choosing a transmit modulation scheme of the transmission, choosing a transmit parameter of the transmission, transmitting the data stream according to the chosen transmit modulation and transmit parameter such that data of the data stream is transmitted by the modulation scheme and the choice of transmit parameter.
    Type: Application
    Filed: March 27, 2015
    Publication date: December 3, 2015
    Inventors: Serdar Sezginer, Hikmet Sari
  • Patent number: 8711965
    Abstract: A method and apparatus are provided for transmission in a communication system. The system includes a transmitter having at least one first and second antenna and a receiver, which includes at least one receiving antenna. The method includes determining a transmit diversity scheme for at least one group of symbols from among a plurality of modulated symbols. This step includes at least one step of obtaining a phase shift of at least one symbol of the at least one group of symbols. The phase shift is based on: at least one phase shift parameter N; and responses (hk1, hk2), respectively, between the at least one first antenna and the at least one receiving antenna and between the at least one second antenna and the at least one receiving antenna. The method further includes a step of phase shifting, allowing rotation of said symbol at a multiple of a ?/N value.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: April 29, 2014
    Assignee: Sequans Communications
    Inventor: Hikmet Sari
  • Patent number: 8363745
    Abstract: A method is provided for transmitting radio signals. Two channels are defined by two transmit antennas, having two orthogonal directions, together with two receive antennas, having two orthogonal directions. An optimal quality of one received signal is determined by signal processing, which emulates a rotation of the two orthogonal receive directions, and a mutual interference of the signals received on the two channels, due to a polarization mismatch, is cancelled, based on a corresponding optimal rotation angle.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: January 29, 2013
    Assignee: Sequans Communications
    Inventor: Hikmet Sari
  • Patent number: 8355459
    Abstract: An embodiment of a method for transmitting a sequence of symbols through at least a channel in a wireless communication system includes: forming a coding matrix with the sequence of symbols, each component of the coding matrix being a linear combination of two symbols among a first, a second, a third, and a fourth symbol (s1, s2, s3 , s4), transmitting a first component and a second component of a first column and of a second column of the coding matrix through a first transmit antenna and a second transmit antenna at a first and a second time slot wherein the coding matrix is defined as ( as 1 + bs 3 - cs 2 * - ds 4 * as 2 + bs 4 cs 1 * + ds 3 * ) , a, b, c, d being complex numbers of modulus 1.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 15, 2013
    Assignee: Sequans Communications
    Inventors: Hikmet Sari, Serdar Sezginer
  • Patent number: 8059769
    Abstract: The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer (25), such as a ZF equalizer, placed upstream of the noise predictor (20). The device (D2) may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: November 15, 2011
    Assignee: Juniper Networks, Inc.
    Inventors: Ambroise Popper, Fabien Buda, Hikmet Sari
  • Publication number: 20110235735
    Abstract: A method and apparatus are provided for transmission in a communication system. The system includes a transmitter having at least one first and second antenna and a receiver, which includes at least one receiving antenna. The method includes determining a transmit diversity scheme for at least one group of symbols from among a plurality of modulated symbols. This step includes at least one step of obtaining a phase shift of at least one symbol of the at least one group of symbols. The phase shift is based on: at least one phase shift parameter N; and responses (hk1, hk2), respectively, between the at least one first antenna and the at least one receiving antenna and between the at least one second antenna and the at least one receiving antenna. The method further includes a step of phase shifting, allowing rotation of said symbol at a multiple of a ?/N value.
    Type: Application
    Filed: March 29, 2011
    Publication date: September 29, 2011
    Applicant: SEQUANS COMMUNICATIONS
    Inventor: Hikmet Sari
  • Publication number: 20110013734
    Abstract: The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer (25), such as a ZF equalizer, placed upstream of the noise predictor (20). The device (D2) may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
    Type: Application
    Filed: September 27, 2010
    Publication date: January 20, 2011
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: Ambroise POPPER, Fabien BUDA, Hikmet SARI
  • Patent number: 7835458
    Abstract: An embodiment of a method for decoding a received signal function of at least a channel matrix B, and of a first and second symbols S1, and S2 belonging to a signal constellation. The method comprises the steps of: selecting a set of values of the first symbol S1 in the signal constellation; for each selected value of the first symbol S1: estimating the value of the second symbol S2 to generate an estimated value of the second symbol; calculating an Euclidean distance between the received signal and a noiseless signal defined by the first symbol with said selected value and by the second symbol with said estimated value; selecting the minimal Euclidean distance among the Euclidean distances respectively calculated for the different selected values of the set of possible values of the first symbol; and selecting decoded first and second symbols corresponding to the selected minimum Euclidean distance.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: November 16, 2010
    Assignee: Sequans Communications
    Inventors: Bertrand Muquet, Hikmet Sari
  • Patent number: 7826569
    Abstract: The invention provides a device for reducing ingress noise in a digital signal, comprising a noise predictor for predicting an amount of ingress noise in the digital signal based on past samples of the ingress noise, and a subtractor for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer, such as a ZF equalizer, placed upstream of the noise predictor. The device may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: November 2, 2010
    Assignee: Juniper Networks, Inc.
    Inventors: Ambroise Popper, Fabien Buda, Hikmet Sari
  • Publication number: 20100166099
    Abstract: An embodiment of a method for transmitting a sequence of symbols through at least a channel in a wireless communication system comprises at least the steps of: forming a coding matrix (MC) with said sequence of symbols, each component of the coding matrix (MC) being a linear combination of two symbols among a first, a second, a third, and a fourth symbol (s1, s2, s3, s4), transmitting a first and a second components of a first column and of a second column of the coding matrix through a first and a second transmit antennas (Tx1, Tx2), at a first and a second time slot (T1, T2). The coding matrix (MC) is defined as: ( as 1 + bs 3 - cs 2 * - ds 4 * as 2 + bs 4 cs 1 * + ds 3 * ) , a, b, c, d being complex numbers of modulus 1.
    Type: Application
    Filed: March 27, 2008
    Publication date: July 1, 2010
    Applicant: SEQUANS COMMUNICATIONS
    Inventors: Hikmet Sari, Serdar Sezginer
  • Publication number: 20100135445
    Abstract: A method is provided for transmitting radio signals. Two channels are defined by two transmit antennas, having two orthogonal directions, together with two receive antennas, having two orthogonal directions. An optimal quality of one received signal is determined by signal processing, which emulates a rotation of the two orthogonal receive directions, and a mutual interference of the signals received on the two channels, due to a polarization mismatch, is cancelled, based on a corresponding optimal rotation angle.
    Type: Application
    Filed: November 27, 2009
    Publication date: June 3, 2010
    Applicant: SEQUANS COMMUNICATIONS
    Inventor: Hikmet Sari
  • Patent number: 7599338
    Abstract: A peak power reduction method for wireless communication systems is proposed in which a constellation shaping is applied on input data symbols in order to reduce the peak power of the signal samples to be transmitted by the communication system. According to the invention, the symbols are modified using functions each representing the contribution of a symbol to the output signal samples of large magnitude.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: October 6, 2009
    Assignee: Sequans Communication
    Inventor: Hikmet Sari
  • Publication number: 20090003372
    Abstract: The invention provides a device for reducing ingress noise in a digital signal, comprising a noise predictor for predicting an amount of ingress noise in the digital signal based on past samples of the ingress noise, and a subtractor for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer, such as a ZF equalizer, placed upstream of the noise predictor. The device may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
    Type: Application
    Filed: April 21, 2008
    Publication date: January 1, 2009
    Applicant: Juniper Networks, Inc.
    Inventors: Ambroise Popper, Fabien Buda, Hikmet Sari
  • Patent number: 7382839
    Abstract: The invention provides a device for reducing ingress noise in a digital signal, comprising a noise predictor for predicting an amount of ingress noise in the digital signal based on past samples of the ingress noise, and a subtractor for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer, such as a ZF equalizer, placed upstream of the noise predictor. The device may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: June 3, 2008
    Assignee: Juniper Networks, Inc.
    Inventors: Ambroise Popper, Fabien Buda, Hikmet Sari
  • Publication number: 20070268813
    Abstract: An embodiment of a method for decoding a received signal function of at least a channel matrix H, and of a first and second symbols s1 and s2 belonging to a signal constellation. The method comprises the steps of: selecting a set of values of the first symbol s1 in the signal constellation; for each selected value of the first symbol s1: estimating the value of the second symbol s2 to generate an estimated value of the second symbol; calculating an Euclidean distance between the received signal and a noiseless signal defined by the first symbol with said selected value and by the second symbol with said estimated value; selecting the minimal Euclidean distance among the Euclidean distances respectively calculated for the different selected values of the set of possible values of the first symbol; and selecting decoded first and second symbols corresponding to the selected minimum Euclidean distance.
    Type: Application
    Filed: April 5, 2007
    Publication date: November 22, 2007
    Inventors: Bertrand Muquet, Hikmet Sari
  • Publication number: 20060268672
    Abstract: A peak power reduction method for wireless communication systems is proposed in which a constellation shaping is applied on input data symbols in order to reduce the peak power of the signal samples to be transmitted by the communication system. According to the invention, the symbols are modified using functions each representing the contribution of a symbol to the output signal samples of large magnitude.
    Type: Application
    Filed: April 6, 2006
    Publication date: November 30, 2006
    Inventor: Hikmet Sari