Patents Examined by David C. Payne
  • Patent number: 10411936
    Abstract: An apparatus and method for broadcast signal frame using a bootstrap and a preamble are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a time interleaver configured to generate a time-interleaved signal by performing interleaving on a BICM output signal; and a frame builder configured to generate a broadcast signal frame including a bootstrap and a preamble using the time-interleaved signal.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: September 10, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Ik Park, Jae-Young Lee, Sun-Hyoung Kwon, Heung-Mook Kim
  • Patent number: 10396929
    Abstract: The invention relates to an all-optical regeneration system for regeneration of optical wavelength division multiplexed WDM data signals in an optical WDM communication system. The system comprises a WDM-to-Optical time domain multiplexing OTDM, WDM-to-OTDM, converter, capable of converting an input WDM data signal comprising multiple wavelength channels into an input OTDM data signal comprising multiple time multiplexed time channels. The system further comprises an all-optical regenerator unit being configured for regenerating the input OTDM data signal into an output OTDM data signal. The system additionally comprises an OTDM-to-WDM converter for converting the output OTDM data signal to an output WDM data signal. An input of the all-optical regenerator unit is in optical communication with an output of the WDM-to-OTDM converter, and an output of the all-optical regenerator unit is in optical communication with an input of the OTDM-to-WDM converter.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 27, 2019
    Assignee: Danmarks Tekniske Universitet
    Inventors: Leif Katsuo Oxenløwe, Hans Christian Hansen Mulvad, Michael Galili, Zohreh Lali-Dastjerdi, Francesco Da Ros, Evarist Palushani, Christophe Peucheret, Hao Hu
  • Patent number: 10382231
    Abstract: A receiver circuit comprising an averaging-processing-block that is configured to receive an OFDM signal. The OFDM signal comprises a plurality of sample-values, wherein the sample-values comprise: a middle-sample-value; a lower-sample-value-group; and a higher-sample-value-group. The averaging-processing-block can determine an averaged-sample-value for the middle-sample-value by performing an averaging operation on the sample-values of the lower-sample-value-group and the higher-sample-value-group, but not on the middle-sample-value.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: August 13, 2019
    Assignee: NXP B.V.
    Inventor: Wim van Houtum
  • Patent number: 10382191
    Abstract: A first device may provide, to a second device, a first message that includes a first request for a first type of precision time protocol (PTP) message and a second request for a second type of PTP message. The first device may receive, from the second device, a second message based on the first message. The second message may identify whether the first request and the second request are granted. The first device may provide, to the second device, a third message that instructs the second device to provide a first set of messages, associated with the first type of PTP message, and a second set of messages associated with the second type of PTP message. The first device may synchronize a first clock of the first device with a second clock of the second device based on the first set of messages and the second set of messages.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: August 13, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Prasanth Kemparaj, Satheesh Kumar S
  • Patent number: 10382156
    Abstract: It is provided a method for reducing interference. The method is performed in a receiver and comprises the steps of: receiving a first signal forming part of a symbol; extracting a differential signal by comparing the first signal with a second signal, wherein the first signal and the second signal are based on the same information; estimating a base frequency of the differential signal for the symbol; mapping the base frequency to a first time of the symbol; estimating frequencies at other times of the symbol using interpolation and/or extrapolation using base frequencies from at least one adjacent symbol; reconstructing an interfering signal based on the estimated frequencies; and subtracting the reconstructed interfering signal from a received signal for the symbol.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: August 13, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Elmar Trojer, Miguel Berg, Per-Erik Eriksson, Chenguang Lu
  • Patent number: 10382159
    Abstract: A dummy-light generating device includes a continuous wave (CW) light source that outputs CW light, a modulated-light generating unit that generates, using the CW light, first intensity-modulated light subjected to intensity modulation and second intensity-modulated light delayed by a half time of a modulation cycle of the first intensity-modulated light with respect to the first intensity-modulated light and having a polarization state e different from a polarization state e of the first intensity-modulated light, and a polarization combiner that performs polarization combination of the first intensity-modulated light and second intensity-modulated light and outputs light after the polarization combination as dummy light.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiki Nakamura, Tsuyoshi Yoshida, Keisuke Matsuda, Tatsuya Kobayashi
  • Patent number: 10367589
    Abstract: The present invention discloses a receiver for coherent optical transport systems based on analog signal processing and the method of recovering transmitted data by processing signals in electronic domain. In the present invention, high-speed electrical signals obtained from optical-to-electrical converters which carry transmitted data information in a coherent transport system are jointly processed in analog domain itself without converting these signals to the digital domain using high speed ADCs. Different processing steps which may include carrier phase & frequency offset recovery and compensation, polarization mode dispersion and/or chromatic dispersion, clock & data recovery and deserialization may be performed while keeping the information signals in analog domain itself.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: July 30, 2019
    Assignee: Indian Institute of Technology Bombay
    Inventors: Shalabh Gupta, N. P. Nandakumar, Anita Gupta, Pawankumar Pradeepkumar Moyade
  • Patent number: 10361777
    Abstract: A system for testing optical transmitters including a testing unit, a sensor board, one or more support rails, and a driver is provided. The testing board includes sockets that each receive a substrate supporting a plurality of optical transmitters, and the sensor board includes optical receivers. The one or more support rails are attached to one of the testing board or the sensor board and are designed to engage the other of the testing board or the sensor board. The one or more support rails are configured to substantially align each of the optical receivers with a corresponding socket. The driver is in electrical communication with the optical transmitters and the one or more optical receivers such that the driver can apply a current input to at least, one of the optical transmitters and monitor a corresponding output parameter.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: July 23, 2019
    Assignee: MELLANOX TECHNOLOGIES, LTD.
    Inventors: Elad Mentovich, Itsik Kalifa, Kfir Margalit
  • Patent number: 10355783
    Abstract: An optical-to-optical (O2O) signal path, O2O and hybrid transceivers including the same, a network system or device including one or more of the transceivers, and methods of making and using the same are disclosed. The O2O signal path generally includes first and second ports and an optical amplifier configured to receive an optical signal from a host or a network through the first port and provide an amplified optical signal for the other of the host and the network through the second port. In some examples, the O2O signal path further includes one or more optical isolators and/or clock and data recovery functions. The optical signals in the O2O signal path are processed entirely in the optical domain. The transceiver includes the O2O signal path and may include an optoelectronic signal path, a pass-through connector, or a second O2O signal path.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: July 16, 2019
    Assignee: Source Photonics (Chengdu) Co., Ltd.
    Inventor: Mark Heimbuch
  • Patent number: 10348442
    Abstract: A dummy-light generating device includes a continuous wave (CW) light source that outputs CW light, a modulated-light generating unit that generates, using the CW light, first intensity-modulated light subjected to intensity modulation and second intensity-modulated light delayed by a half time of a modulation cycle of the first intensity-modulated light with respect to the first intensity-modulated light and having a polarization state e different from a polarization state e of the first intensity-modulated light, and a polarization combiner that performs polarization combination of the first intensity-modulated light and second intensity-modulated light and outputs light after the polarization combination as dummy light.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiki Nakamura, Tsuyoshi Yoshida, Keisuke Matsuda, Tatsuya Kobayashi
  • Patent number: 10348405
    Abstract: Multi-functional units incorporating lighting capabilities in converged networks, and related networks and methods are disclosed. The multi-functional units are configured to be included at end points in a wireless communications network to serve as distribution points for distribution of communications services. Each multi-functional unit includes a plurality of wireless communications circuits in a single unit or housing to support multiple communications services. Thus, a single multi-functional unit can be installed in a location to support the multiple communications services to minimize installation footprint. To further conserve installation footprint, the wireless communications network can be provided as a converged network that includes a single communications backbone to converge multiple networks for the multiple communications services supported by the multi-functional units.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: July 9, 2019
    Assignee: Corning Incorporated
    Inventors: Aravind Chamarti, Ulrich Wilhelm Heinz Neukirch, Rajeshkannan Palanisamy, Yuval Zinger
  • Patent number: 10341021
    Abstract: Methods and systems for optoelectronics transceivers integrated on a CMOS chip are disclosed and may include receiving optical signals from optical fibers via grating couplers on a top surface of a CMOS chip, which may include a guard ring. Photodetectors may be integrated in the CMOS chip. A CW optical signal may be received from a laser source via optical couplers, and may be modulated using optical modulators, which may be Mach-Zehnder and/or ring modulators. Circuitry in the CMOS chip may drive the optical modulators. The modulated optical signal may be communicated out of the top surface of the CMOS chip into optical fibers via grating couplers. The received optical signals may be communicated between devices via waveguides. The photodetectors may include germanium waveguide photodiodes, avalanche photodiodes, and/or heterojunction diodes. The CW optical signal may be generated using an edge-emitting and/or a vertical-cavity surface emitting semiconductor laser.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: July 2, 2019
    Assignee: Luxtera, Inc.
    Inventors: Thierry Pinguet, Steffen Gloeckner, Sherif Abdalla, Sina Mirsaidi, Peter De Dobbelaere
  • Patent number: 10333614
    Abstract: Partial survivability systems and methods implemented in a node in an Optical Transport Unit Cn (OTUCn) network include, subsequent to an optical carrier (Optical Tributary Signal (OTSi)) failure of a plurality of optical carriers, determining which Optical Data Unit k (ODUk) services in an OTUCn associated with the OTSi are affected; signaling a partial failure for the OTUCn and a failure only for the affected ODUk services; adjusting overhead associated with the OTUCn based on the OTSi failure; and applying actions to the affected ODUk services subsequent to the OTSi failure. The signaling of the partial failure can include signaling one or more of a partial Alarm Indication Signal (P-AIS), a partial Backward Defect Indication (P-BDI), and a partial Server Signal Fail (P-SSF) for the OTUCn, and the signaling the failure can include signaling one or more of AIS, BDI, and SSF only for the affected ODUk services.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: June 25, 2019
    Assignee: Ciena Corporation
    Inventors: Trevor John Ibach, Rahim Amarsi, Sebastien Gareau
  • Patent number: 10333618
    Abstract: Aspects of the present disclosure describe systems, methods, and structures for physical layer security using hybrid free-space optical and terahertz transmission technologies that advantageously overcome atmospheric characteristics that infirmed the prior art.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: June 25, 2019
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Shaoliang Zhang, Ting Wang
  • Patent number: 10330960
    Abstract: An optical demultiplexer that includes at least one a hybrid phase shifter configured to receive a light signal over a fiber element, the light signal including polarized optical signals. Each phase shifter includes a thermo-optic phase shifter configured to phase shift the light signal, an electro-optic phase shifter configured to phase shift the light signal, and a coupler configured to maintain polarization of the polarized signal components. The optical demultiplexer also includes control circuitry configured to regulate the thermo-optic and electro-optic phase shifters.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: June 25, 2019
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Sean Anderson, Mark Webster, Kalpendu Shastri
  • Patent number: 10321430
    Abstract: A method, apparatus, computer program, and data structure relating to: causing correlation of a digital signal provided by a receiver with a motion-compensated correlation code, wherein the motion-compensated correlation code is a correlation code that has been compensated before correlation using one or more phasors dependent upon an assumed or measured movement of the receiver.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: June 11, 2019
    Assignee: Focal Point Positioning Ltd.
    Inventors: Ramsey Faragher, Nicolas Couronneau, Robert Mark Crockett, Peter Duffett-Smith
  • Patent number: 10313024
    Abstract: The present disclosure is generally directed to a transmitter optical subassembly (TOSA) having a hermetically-sealed housing with a feedthrough device that electrically isolates RF and power traces. In more detail, a TOSA consistent with the present disclosure includes a substrate with driving circuitry disposed thereon. A first end of the substrate may electrically couple to transmit connecting circuitry and a second end may couple to a hermetically-sealed housing. The hermetically-sealed housing can include one or more laser packages for emitting associated channel wavelengths in addition to monitor photodiodes (PDs), and temperature control devices such as TECs. The hermetic-sealed housing includes a first end with a feedthrough device that provides traces to electrically couple to the circuitry of the substrate. The hermetic-sealed housing further includes an optical coupling port, e.g., a LC connector, for coupling to an external fiber, for example.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 4, 2019
    Assignee: Applied Optoelectronics, Inc.
    Inventors: I-Lung Ho, Kevin Liu, YongXuan Liang
  • Patent number: 10305586
    Abstract: An optical time-domain reflectometer (OTDR) is provided. The OTDR emits a first optical signal that is an impulse optical signal having a non-zero power during a first period of time, where the first period of time is shorter than a period of time necessary for the first optical signal to traverse a length of an optical fiber under test. The OTDR emits a second optical signal that is an impulse optical signal having a non-zero power during a second period of time longer than a period of time necessary for the second optical signal to traverse the length of the optical fiber. The OTDR receives data representative of a third and fourth optical signals that are reflections of the first and second optical signals, respectively, by the optical fiber and generates an optical time-domain reflectometry signal based at least in part on the third and fourth optical signals.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 28, 2019
    Assignee: Fluke Corporation
    Inventors: Harlan L. Kassler, Seymour Goldstein, Jackson L. Salling
  • Patent number: 10298330
    Abstract: An embodiment includes a host-equalized optical transceiver. The host-equalized optical transceiver includes a driver analog interface, a linear laser diode driver (LLDD), and an optical transmitter. The driver analog interface is configured to interface with a host integrated circuit (IC) of a host system. The LLDD is directly electrically coupled to a host IC of the host system via the driver analog interface. The LLDD is configured to receive an equalized electrical data signal directly from the host IC via the driver analog interface and to generate a driving signal based on the equalized electrical data signal. The equalized electrical data signal is a linear signal. The optical transmitter is electrically coupled to the LLDD. The optical transmitter is configured to receive the driving signal from the LLDD and to generate an optical signal that is representative of the driving signal.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: May 21, 2019
    Assignee: FINISAR CORPORATION
    Inventor: Jim Alan Tatum
  • Patent number: 10291322
    Abstract: Embodiments disclosed in the detailed description include supporting an add-on remote unit(s) (RU) in an optical fiber-based distributed antenna system (DAS) over existing optical fiber communications medium using radio frequency (RF) multiplexing. An existing DAS comprises at least one existing head end equipment (HEE) communicatively coupled to a plurality of existing RUs through an existing optical fiber communications medium. In aspects disclosed herein, an add-on RU is added to the existing DAS to support additional wireless communications. No new optical fibers are required to be deployed to support communications to the add-on RU in the existing DAS. Instead, the existing DAS is configured to support the add-on RU through the existing optical fiber communications medium using RF multiplexing. As a result, the add-on RU can be added to the existing optical fiber-based DAS without adding new optical fibers, thus leading to reduced service disruptions and deployment costs.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: May 14, 2019
    Assignee: Corning Optical Communications LLC
    Inventors: Yury Abramov, Nissim Atias, Dror Harel, Hillel Akiva Hendler, Gavriel Magnezi, Yuval Zinger