Patents by Inventor Yehouda Meiman

Yehouda Meiman 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).

  • Patent number: 8634723
    Abstract: The invention related to the system and method for optical communication using light of two polarization states. Polarization distortion loss (PDL) is compensated by implementation of polarization controllers at both the transmitter and receiver sides. The transmitter controller performs a mixing transformation of beam with two polarizations, while the receiver controller performs the same transformation in the opposite direction with exactly same sequence as in the transmitter part. A cross scrambling and a polarization rotation represented by matrix multiplication are examples of such mixing polarization transformations. The averaged PDL induced errors are corrected by the FEC code plus interleavers.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: January 21, 2014
    Assignee: Celight
    Inventors: Yehouda Meiman, Raanan Ivry
  • Patent number: 8064767
    Abstract: The present invention provides a system and method of optical communications that utilize coherent detection technique and optical orthogonal frequency division multiplexing for phase encoded data transmission. In particular the invention addresses a device and method for digital polarization compensation of optical signals with up to 100 Gb/s transmission rate received via an optical link. The polarization compensation operates in two modes: acquisition mode and tracking mode. The polarization recovery is performed at the receiver side using the received digital signal conversion into frequency domain and separate reconstruction of the polarization state in each spectral component.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: November 22, 2011
    Assignee: CeLight, Inc.
    Inventors: Isaac Shpantzer, Alexander Genusov, Yehouda Meiman, Jacob Khurgin
  • Publication number: 20110150498
    Abstract: The invention related to the system and method for optical communication using light of two polarization states. Polarization distortion loss (PDL) is compensated by implementation of polarization controllers at both the transmitter and receiver sides. The transmitter controller performs a mixing transformation of beam with two polarizations, while the receiver controller performs the same transformation in the opposite direction with exactly same sequence as in the transmitter part. A cross scrambling and a polarization rotation represented by matrix multiplication are examples of such mixing polarization transformations. The averaged PDL induced errors are corrected by the FEC code plus interleavers.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Inventors: Yehouda Meiman, Raanan Ivry
  • Publication number: 20100310256
    Abstract: The present invention discloses a receiver for optical system, which provides improved performance due to implementation of multiple parallel analog-to-digital converters. Such configuration allows reducing the data speed processing thus improving bit-error-rate. Each channel of the WDM communications system consists of a set of orthogonal spectral bands. These bands are modulated via orthogonal frequency division multiplexing (OFDM) technique using M-PSK modulation format. At the receiver side, the incoming optical beam is split into a set of parallel branches. Each branch is mixed with a local oscillator beam having a spectrum within one sub-band of the WDM channel. In the preferred embodiment these beams are mixed in 90-degrees optical hybrid, which is followed by a set of balanced photodetectors. The baseband of each sub-band signal is converted into a digital signal using ADC.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 9, 2010
    Inventors: Isaac Shpantzer, Yehouda Meiman
  • Publication number: 20080159758
    Abstract: The present invention provides a system and method of optical communications that utilize coherent detection technique and optical orthogonal frequency division multiplexing for phase encoded data transmission. In particular the invention addresses a device and method for digital polarization compensation of optical signals with up to 100 Gb/s transmission rate received via an optical link. The polarization compensation operates in two modes: acquisition mode and tracking mode. The polarization recovery is performed at the receiver side using the received digital signal conversion into frequency domain and separate reconstruction of the polarization state in each spectral component.
    Type: Application
    Filed: March 11, 2008
    Publication date: July 3, 2008
    Inventors: Isaac Shpantzer, Alexander Genusov, Yehouda Meiman, Jacob Khurgin
  • Patent number: 7167651
    Abstract: A system for optical communication forms a family of orthogonal optical codes modulated by a data stream. The orthogonal codes are formed by creating a stream of evenly spaced-apart pulses using a pulse spreader circuit and modulating the pulses in amplitude and/or phase to form a family of orthogonal optical code words, each representing a symbol. A spreader calibration circuit is used to ensure accurate timing and modulation. Each code word is further modulated by a predetermined number of data bits. The data modulation scheme splits a code word into H and V components, and further processes the components prior to modulation with data, followed by recombining with a polarization beam combiner. The data-modulated code word is then sent, along with others to receiver. The received signal is detected and demodulated with the help of a symbol synchronization unit which establishes the beginning and end of the code words.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: January 23, 2007
    Assignee: CeLight, Inc.
    Inventors: Isaac Shpantzer, Michael Tseytlin, Yaakov Achiam, Aviv Salamon, Israel Smilanski, Olga Ritterbush, Pak Shing Cho, Li Guoliang, Jacob Khurgin, Yehouda Meiman, Alper Demir, Peter Feldman, Peter Kinget, Nagendra Krishnapura, Jaijeet Roychowdhury, Joseph Schwarzwalder, Charles Sciabarra
  • Patent number: 7076169
    Abstract: A system for optical communication send optical signals over a plurality of wavelength channels. Each wavelength channel comprises a number of orthogonal subchannel frequencies which are spaced apart from one another by a predetermined amount. Each of the subchannel frequencies is modulated with data from a data stream. The data modulation scheme splits a subchannel frequency code into H and V components, and further processes the components prior to modulation with data. The various data-modulated subchannels are then combined into a single channel for transmission. The received signals are detected and demodulated with the help of a symbol timing recovery module which establishes the beginning and end of each symbol. A polarization mode distortion compensation module at the receiver is used to mitigate the effects to polarization more distortion in the fiber.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: July 11, 2006
    Assignee: CeLight, Inc.
    Inventors: Isaac Shpantzer, Yehouda Meiman, Michael Tseytlin, Olga Ritterbush, Aviv Salamon, Peter Feldman, Alper Demir, Peter Kinget, Nagendra Krishnapura, Jaijeet Roychowdhury
  • Publication number: 20020186435
    Abstract: A system for optical communication send optical signals over a plurality of wavelength channels. Each wavelength channel comprises a number of orthogonal subchannel frequencies which are spaced apart from one another by a predetermined amount. Each of the subchannel frequencies is modulated with data from a data stream. The data modulation scheme splits a subchannel frequency code into H and V components, and further processes the components prior to modulation with data. The various data-modulated subchannels are then combined into a single channel for transmission. The received signals are detected and demodulated with the help of a symbol timing recovery module which establishes the beginning and end of each symbol. A polarization mode distortion compensation module at the receiver is used to mitigate the effects to polarization more distortion in the fiber.
    Type: Application
    Filed: February 28, 2002
    Publication date: December 12, 2002
    Inventors: Isaac Shpantzer, Yehouda Meiman, Michael Tseytlin, Olga Ritterbush, Aviv Salamon, Peter Feldman, Alper Demir, Peter Kinget, Nagendra Krishnapura, Jaijeet Roychowdhury
  • Publication number: 20020145787
    Abstract: A system for optical communication forms a family of orthogonal optical codes modulated by a data stream. The orthogonal codes are formed by creating a stream of evenly spaced-apart pulses using a pulse spreader circuit and modulating the pulses in amplitude and/or phase to form a family of orthogonal optical code words, each representing a symbol. A spreader calibration circuit is used to ensure accurate timing and modulation. Each code word is further modulated by a predetermined number of data bits. The data modulation scheme splits a code word into H and V components, and further processes the components prior to modulation with data, followed by recombining with a polarization beam combiner. The data-modulated code word is then sent, along with others to receiver. The received signal is detected and demodulated with the help of a symbol synchronization unit which establishes the beginning and end of the code words.
    Type: Application
    Filed: September 26, 2001
    Publication date: October 10, 2002
    Inventors: Isaac Shpantzer, Isaac Tseytlin, Yaakov Achiam, Aviv Salamon, Israel Smilanski, Olga Ritterbush, Pak Shing Cho, Charles Sciabarra, Jacob Khurgin, Yehouda Meiman, Alper Demir, Peter Feldmann, Peter Kinget, Nagendra Krishnapura, Jaijeet Roychowdhury, Joseph Schwarzwalder, Charles Sciabarra
  • Patent number: 5870426
    Abstract: An acknowledgment paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgment paging over long distances. The acknowledgment paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 9, 1999
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman
  • Patent number: 5712867
    Abstract: A method, apparatus and system is described for distributing accurate time-of-day information from an existing telecommunications infrastructure without modifying the existing infrastructure. In particular, the system comprises a base station device which continually receives extremely accurate time-of-day information from, by way of example and not by limitation, a GPS (Global Positioning Satellite) system, a local atomic dock, or a wired or wireless time standard. The base station periodically places time-of-day information into standard paging packets for transmission over a standard paging network. The paging packets are sent over telephone lines to the paging terminal for transmission whenever a time slot for transmission becomes available. The base station device records the actual time of transmission of the paging packet containing the time of day information and prepares the next time-of-day packet by placing the exact transmission time of the previous time-of-day packet sent.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: January 27, 1998
    Assignee: NEXUS 1994 Limited
    Inventors: Hanoch Yokev, Yehouda Meiman, Shimon Peleg, Oren Yokev, Boaz Porat
  • Patent number: 5596330
    Abstract: A differential ranging location system is described which uses a modified time-of-arrival technique to determine the location of a frequency hopped spread spectrum radio signal. The transmitter simultaneously transmits two radio frequency carriers having different frequencies such that a phase difference is observed between the two carriers at a distance from the transmitter. The phase difference is proportional to the range from the transmitter that the carrier signals are observed. The two carrier signals from the single transmitter are received by at least three and in special cases four base stations which calculate the differential time of arrival based on the phase differences of the received carriers. The calculated phase differences are then sent to a central location which locates the position of the transmitter based upon a planer hyperbolic location algorithm.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: January 21, 1997
    Assignee: Nexus Telecommunication Systems Ltd.
    Inventors: Hanoch Yokev, Shimon Peleg, Yehouda Meiman, Boaz Porat
  • Patent number: 5592180
    Abstract: A special mobile radio mobile, vehicle or personal location system is described where the system operates to locate any one of a the transmitters in an SMR system. The present invention operates by identifying the received signals, removing the modulation information to reconstruct a demodulated carrier and analyzing the carrier signals for multipath distortion. The multipath disruptions are removed to calculate the true incident angle of the transmitted signal at a base station. A plurality of base stations are used to simultaneously calculate the incident angle of the transmitted SMR signal and a central location calculates the most probable location of the transmitter based upon triangulation. The incident angle of the transmitted SMR signal at each base station is performed by calculating the phase differences of the incoming voice signal with phase ambiguity minimized by using a plurality of dipole antennas spaced at an irregular distance to eliminate phase ambiguity error.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: January 7, 1997
    Assignee: Nexus1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman, Shimon Peleg
  • Patent number: 5583517
    Abstract: A multi-path resistant frequency-hopped spread spectrum mobile vehicle or personal location system is described which provides low cost manufacture and low power operation while still enabling the accurate location of the mobile unit over long distances and in moderate to severe multi-path conditions. The frequency-hopped spread spectrum mobile vehicle or personal location system consists of a central station, a plurality of base stations and a plurality of mobile transmitters which transmit using a frequency-hopped spread-spectrum differential bi-phase shift keying communication signal. Frequency Shift Keying modulation may also be used. Each of the plurality of base stations include an array of receiving dipole antennas and employs special algorithms for retrieving very low power frequency-hopped spread spectrum signals in a noisy and multi-path environment.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: December 10, 1996
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman, Shimon Peleg
  • Patent number: 5546422
    Abstract: An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: August 13, 1996
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman
  • Patent number: 5519718
    Abstract: An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: May 21, 1996
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman
  • Patent number: 5499266
    Abstract: An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: March 12, 1996
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman
  • Patent number: 5430759
    Abstract: An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: July 4, 1995
    Assignee: Nexus 1994 Limited
    Inventors: Hanoch Yokev, Haim Harel, Yehouda Meiman