Patents by Inventor Dov Wulich
Dov Wulich 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: 10164583Abstract: A linearized MIMO system which includes a MIMO receiver which comprises one or more receiving units, each receiving unit comprises one or more receiving antennas and an optional MIMO spatial decoder. The linearized MIMO system also includes a linearized MIMO transmitter, which comprises a plurality of non-linear power amplifiers at respective transmission branches, where each of the non-linear power amplifiers feeds a respective antenna with an amplified signal. The linearized MIMO system also includes a MIMO spatial pre-coder for receiving an artificial data signal from a global linearizer, and based on a channel state information of the medium (medium-channel), the linearized MIMO system creates a plurality of transmission branch-signals. Each of the branch signals feeds one of the non-linear power amplifiers, respectively. The global linearizer receives a data signal and creates the artificial data signal.Type: GrantFiled: March 13, 2016Date of Patent: December 25, 2018Assignee: B.G. Negev Technologies and Applications Ltd., at Ben-Gurion UniversityInventors: Dov Wulich, Ilia Iofedov
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Add-on system and methods for spatial suppression of interference in wireless communication networks
Patent number: 10057001Abstract: A system for cancelling interference in a wireless network, the system comprising apparatus for computing and outputting at least N weighting vectors; and apparatus for cancelling interference from antennae outputs received by the system using the weighting vectors respectively by converting the weighting vectors into FIR filter coefficients and applying FIR filters corresponding to the FIR filter coefficients to derivatives of antennae outputs received by the system. The apparatus for computing and outputting weighting vectors may be operative by estimating a spatial signature while distinguishing interference spatial signature from desired signal spatial signature although both are received simultaneously.Type: GrantFiled: April 11, 2017Date of Patent: August 21, 2018Assignee: ELTA SYSTEMS LTD.Inventors: Shmuel Weisbart, Joseph Tabrikian, Dov Wulich -
Publication number: 20180048268Abstract: The invention relates to a linearized MIMO system which comprises: (a) a MIMO receiver which comprises one or more receiving units, each receiving unit comprises: (a.1) one or more receiving antennas; and (a.2) an optional MIMO spatial decoder and (b) a linearized MIMO transmitter, which comprises: (b.1) a plurality of non-linear power amplifiers at respective transmission branches, each of said non-linear power amplifiers feeding a respective antenna with an amplified signal; (b2) a MIMO spatial pre-coder for receiving an artificial data signal from a global linearizer, and based on a channel state information of the medium (medium-channel), creating plurality of transmission branch-signals, each of said branch signals feeding one of said non-linear power amplifiers, respectively; and (b3) said global linearizer receiving a data signal and creating said artificial data signal.Type: ApplicationFiled: March 13, 2016Publication date: February 15, 2018Inventors: Dov WULICH, Ilia IOFEDOV
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ADD-ON SYSTEM AND METHODS FOR SPATIAL SUPPRESSION OF INTERFERENCE IN WIRELESS COMMUNICATION NETWORKS
Publication number: 20170244508Abstract: A system for cancelling interference in a wireless network, the system comprising apparatus for computing and outputting at least N weighting vectors; and apparatus for cancelling interference from antennae outputs received by the system using the weighting vectors respectively by converting the weighting vectors into FIR filter coefficients and applying FIR filters corresponding to the FIR filter coefficients to derivatives of antennae outputs received by the system. The apparatus for computing and outputting weighting vectors may be operative by estimating a spatial signature while distinguishing interference spatial signature from desired signal spatial signature although both are received simultaneously.Type: ApplicationFiled: April 11, 2017Publication date: August 24, 2017Inventors: Shmuel WEISBART, Joseph TABRIKIAN, Dov WULICH -
Add-on system and methods for spatial suppression of interference in wireless communication networks
Patent number: 9654988Abstract: A system for cancelling interference in a wireless network, the system comprising apparatus for computing and outputting at least N weighting vectors; and apparatus for cancelling interference from antennae outputs received by the system using the weighting vectors respectively by converting the weighting vectors into FIR filter coefficients and applying FIR filters corresponding to the FIR filter coefficients to derivatives of antennae outputs received by the system. The apparatus for computing and outputting weighting vectors may be operative by estimating a spatial signature while distinguishing interference spatial signature from desired signal spatial signature although both are received simultaneously.Type: GrantFiled: February 12, 2013Date of Patent: May 16, 2017Assignee: ELTA SYSTEMS LTD.Inventors: Shmuel Weisbart, Joseph Tabrikian, Dov Wulich -
Patent number: 8995295Abstract: A method and a system for calculating a JCMA constellation for use in a JCMA communication system where the method includes a step of using maximum sum-rate mutual information criterion to select an optimal JCMA constellation for the number of transmitters N, SNR and modulation schemes used by the transmitters.Type: GrantFiled: November 4, 2010Date of Patent: March 31, 2015Assignee: Signext Wireless Ltd.Inventors: Dov Wulich, Gill Raphael Tsouri, Ron Dabora
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ADD-ON SYSTEM AND METHODS FOR SPATIAL SUPPRESSION OF INTERFERENCE IN WIRELESS COMMUNICATION NETWORKS
Publication number: 20150004962Abstract: A system for cancelling interference in a wireless network, the system comprising apparatus for computing and outputting at least N weighting vectors; and apparatus for cancelling interference from antennae outputs received by the system using the weighting vectors respectively by converting the weighting vectors into FIR filter coefficients and applying FIR filters corresponding to the FIR filter coefficients to derivatives of antennae outputs received by the system. The apparatus for computing and outputting weighting vectors may be operative by estimating a spatial signature while distinguishing interference spatial signature from desired signal spatial signature although both are received simultaneously.Type: ApplicationFiled: February 12, 2013Publication date: January 1, 2015Applicant: ELTA SYSTEM, LTDInventors: Shmuel Weisbart, Joseph Tabrikian, Dov Wulich -
Patent number: 8401102Abstract: A method for communication includes defining N respective symbol constellations in a signal space for N transmitters (24), N(2, subject to a predetermined power constraint, so as to produce a joint constellation including superpositions of symbols selected from the N symbol constellations. Data is transferred from the N transmitters by simultaneously transmitting from M the N transmitters N respective symbols selected respectively from the N symbol constellations. A composite symbol including a superposition of the N transmitted symbols is received. The received composite symbol is demodulated using the joint constellation so as to reconstruct the data transferred from the N transmitters.Type: GrantFiled: July 16, 2012Date of Patent: March 19, 2013Assignee: Signext Wireless Ltd.Inventors: Gil Rafael Tsouri, Dov Wulich
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Publication number: 20130010839Abstract: A method for communication includes defining N respective symbol constellations in a signal space for N transmitters (24), N(2, subject to a predetermined power constraint, so as to produce a joint constellation including superpositions of symbols selected from the N symbol constellations. Data is transferred from the N transmitters by simultaneously transmitting from M the N transmitters N respective symbols selected respectively from the N symbol constellations. A composite symbol including a superposition of the N transmitted symbols is received. The received composite symbol is demodulated using the joint constellation so as to reconstruct the data transferred from the N transmitters.Type: ApplicationFiled: July 16, 2012Publication date: January 10, 2013Applicant: SIGNEXT WIRELESS LTDInventors: Gil Rafael Tsouri, Dov Wulich
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Publication number: 20120287801Abstract: A method and a system for calculating a JCMA constellation for use in a JCMA communication system where the method includes a step of using maximum sum-rate mutual information criterion to select an optimal JCMA constellation for the number of transmitters N, SNR and modulation schemes used by the transmitters.Type: ApplicationFiled: November 4, 2010Publication date: November 15, 2012Inventors: Dov Wulich, Gill Raphael Tsouri, Ron Dabora
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Publication number: 20120236964Abstract: System and method for reducing BER in OFDM based communication system. A cost function relating the power partition coefficients and the average power emitted by the linear power amplifier at the transmitter during quasistatic periods of the channel may be minimized, solved or estimated, based on the received channel partial CSI, and on knowledge of the linear power amplifier gain and linear dynamic range, to get power partition coefficients. The total available power may be divided among the subcarriers according to the resultant power partition coefficients. Additionally, the OFDM signal may amplified by a variable gain calculated based on the resultant power partition coefficients.Type: ApplicationFiled: November 30, 2010Publication date: September 20, 2012Inventor: Dov Wulich
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Patent number: 8223882Abstract: A method for communication includes defining N respective symbol constellations in a signal space for N transmitters (24), N(2, subject to a predetermined power constraint, so as to produce a joint constellation including superpositions of symbols selected from the N symbol constellations. Data is transferred from the N transmitters by simultaneously transmitting from the N transmitters N respective symbols selected respectively from the N symbol constellations. A composite symbol including a superposition of the N transmitted symbols is received. The received composite symbol is demodulated using the joint constellation so as to reconstruct the data transferred from the N transmitters.Type: GrantFiled: October 5, 2006Date of Patent: July 17, 2012Assignee: Signext Wireless Ltd.Inventors: Gil Rafael Tsouri, Dov Wulich
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Publication number: 20090135926Abstract: A method for communication includes defining N respective symbol constellations in a signal space for N transmitters (24), N(2, subject to a predetermined power constraint, so as to produce a joint constellation including superpositions of symbols selected from the N symbol constellations. Data is transferred from the N transmitters by simultaneously transmitting from the N transmitters N respective symbols selected respectively from the N symbol constellations. A composite symbol including a superposition of the N transmitted symbols is received. The received composite symbol is demodulated using the joint constellation so as to reconstruct the data transferred from the N transmitters.Type: ApplicationFiled: October 5, 2006Publication date: May 28, 2009Applicant: SIGNEXT WIRELESS LTD.Inventors: Gil Rafael Tsouri, Dov Wulich
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Patent number: 7436858Abstract: An adaptive rate management method and system for adapting a receiver rate to a transmission rate in a packet switch network comprises determining an error value at a sample rate, obtaining an updated accumulator value based on said error value Es at a decimated sample rate, and generating an appropriate rate command and changing said accumulator value at the decimated rate based on the updated accumulator value. The method may be adapted for either adapter point management or bit stuffing. When applied to adapter point management (APM), the method generates pointer adjustments for rate management. In a frequency locked APM preferred embodiment of the method and system, pointer adjustments in an interval are generated at a constant rate based on an average pointer adjustment value calculated in previous intervals.Type: GrantFiled: June 1, 2004Date of Patent: October 14, 2008Assignee: Lycium Networks (B.V.I.) Ltd.Inventors: Motti Goren, Ron Cohen, Dov Wulich
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Publication number: 20040240478Abstract: An adaptive rate management method and system for adapting a receiver rate to a transmission rate in a packet switch network comprises determining an error value at a sample rate, obtaining an updated accumulator value based on said error value Es at a decimated sample rate, and generating an appropriate rate command and changing said accumulator value at the decimated rate based on the updated accumulator value. The method may be adapted for either adapter point management or bit stuffing. When applied to adapter point management (APM), the method generates pointer adjustments for rate management. In a frequency locked APM preferred embodiment of the method and system, pointer adjustments in an interval are generated at a constant rate based on an average pointer adjustment value calculated in previous intervals.Type: ApplicationFiled: June 1, 2004Publication date: December 2, 2004Applicant: LYCIUM NETWORKS (B.V.I.) LTDInventors: Motti Goren, Ron Cohen, Dov Wulich
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Patent number: 6608552Abstract: A method of transmitting data over power lines, a decoder of the transmitted data, and a lighting control system that uses the method. The data are represented as symbols that are encoded in groups of successive bursts of alternating signals, with each burst assigned one of M frequencies. Upon reception, the groups are decoded by a decoder that converts the received bursts into a binary form which is correlated with M binary reference signals by XORing and counting the resulting pulses up or down. The correlation values are added separately for each possible symbol value, with the highest score indicating the decoded symbol.Type: GrantFiled: May 23, 2001Date of Patent: August 19, 2003Assignee: Systel Development & Industries Ltd.Inventors: Meir Fogel, Dov Raviv, Daniel Rubin, Dov Wulich
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Patent number: 6272072Abstract: An underwater communication method, device, and system that enables bi-directional communication between and among under-water divers. In accordance with the present invention, messages may be transmitted and received between and among the divers in a network and/or between divers and a diving boat, buoy, or other reference point. The present invention also permits one or more divers to receive a homing signal and to move toward the source of that signal using an acquisition and tracking feature and functionality that utilizes a Doppler frequency shift and preferably a compass to determine the distance and direction of the source of the signal. The present invention also enables a diver in distress to broadcast a distress signal (i.e., SOS) that is received by every other diver within a predetermined distance from the distressed diver. The divers receiving the distress signal are then able to locate and rescue the distressed diver using the acquisition and tracking feature and functionality.Type: GrantFiled: December 21, 1999Date of Patent: August 7, 2001Assignee: Wulich Wave Ltd.Inventors: Dov Wulich, Leo Rakhovitz
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Patent number: 6130859Abstract: An underwater apparatus for transmitting and receiving high rate data and voice communication including a transmitter, a receiver, and a Doppler frequency shift compensator. The transmitter includes a data source comprising digital data to be transmitted by the apparatus through the water, a serial-to-parallel data processor for splitting the serial digital data into n parallel data channels, a n-channel modulator for receiving the n parallel data channels and for modulating those channels with n pairs of ultrasonic carriers to produce a modulated signal. The transmitter also includes a hydrophone for receiving and transmitting the modulated signal. The receiver includes a hydrophone for receiving a modulated signal.Type: GrantFiled: November 25, 1998Date of Patent: October 10, 2000Assignee: Divecom Ltd.Inventors: Menashe Sonnenschein, Dov Wulich, Elazar Sonnenschein
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Patent number: 6125080Abstract: A personal underwater communication device which comprises: A display; A memory unit for storing a plurality of preset messages, each message being assigned a common message identification code; Means for assigning a unique identification code to each personal device; Means for selecting one of said preset messages, to be transmitted to a receiving device; Means for selecting one or more receiving devices to which a message is to be transmitted; Means for producing a string encoding said message identification code and the identification code of the transmitting device; Means for modulating said string with at least one ultrasound acoustic modulating frequency, thereby to produce a modulated signal; Means for transmitting said modulated signal in water; Means in each device for receiving transmitted ultrasound acoustic modulated signals; Means for demodulating modulated signals which are received by said device, thereby to produce a demodulated string; Means for decoding a message from said demodulated stringType: GrantFiled: August 14, 1998Date of Patent: September 26, 2000Assignee: Divecom Ltd.Inventors: Menashe Sonnenschein, Dov Wulich, Elazar Sonnenschein