Patents Examined by David C. Payne
  • Patent number: 11218224
    Abstract: Disclosed are systems, methods, and structures for DSP-free coherent receiver architectures applicable for short-reach optical links. Operationally, a received optical signal is down-converted by mixing it with a local oscillator (LO) laser signal using a 90-degree hybrid followed by balanced photodiodes. Other receiver functions are performed using analog signal processing thereby avoiding power-hungry, high-speed analog-to-digital converters and high-speed digital signal processing. Carrier phase recovery is performed by an electrical phase-locked loop employing a multiplier-free phase estimator stage that—while designed for quaternary phase-shift keying signals—may be employed in designs exhibiting higher modulation formats. Since carrier phase recovery is performed in the electrical domain, LO laser frequency modulation or LO laser integration is not employed.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: January 4, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Jose Krause Perin, Joseph M. Kahn, Anujit K. Shastri
  • Patent number: 11196608
    Abstract: One embodiment is directed to a method comprising deciding to multiplex the data of at least two users within a super-constellation; determining the power split ratio among the at least two users; selecting a super-constellation; and based on the determined power split ratio, choosing a subset of the super-constellation points forming the superposition of modulation constellations of the at least two users.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 7, 2021
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Karol Schober, Mihai Enescu, Mikko Tapio Kokkonen
  • Patent number: 11190333
    Abstract: A method and an apparatus for estimating synchronization of a broadcast signal in a time domain using a synchronization estimation signal through steps of: performing a correlation operation using a correlation window on a plurality of synchronization estimation signals separated to a plurality of paths and outputting a plurality of correlated signals; delaying the plurality of correlated signals to output a plurality of delayed signals; and estimating the synchronization using the plurality of delayed signals are provided.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: November 30, 2021
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Myung-Sun Baek, Sang-Jung Ra, Byungjun Bae, Yong Seong Cho, Hyoung Kyu Song, Won-Seok Lee
  • Patent number: 11184068
    Abstract: Methods, devices and computer programs for determining new transmit directions to use for beamformed transmissions in case the link quality of an existing direction falters. A transmitting communication device and a receiving communication device cooperate via a beam tracking procedure to determine a new suitable transmit direction to use for upcoming beamformed transmissions. Information relating to the beam tracking procedure is communicated over an existing link that enables communication between the transmitting and receiving communication devices. The receiving communication device provides the transmitting communication device with information about a beam scan performed in order to detect tracking beams transmitted by the transmitting communication device. This information allows the transmitting communication device to determine suitable transmit directions to use.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: November 23, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Torbjörn Wigren, Oskar Mauritz
  • Patent number: 11184085
    Abstract: An electro-optical (EO) interconnect assembly includes an optical fiber, and first and second EO transceivers. The first and second EO transceivers, which are coupled to respective ends of the optical fiber, are configured to (i) connect to respective first and second network devices, (ii) exchange electrical signals with the first and second network devices, (iii) convert between the electrical signals and optical signals, and exchange the optical signals with one another over the optical fiber, and (iv) conduct with one another, over the optical fiber, a secure challenge-response transaction, and to initiate a responsive action upon failure of the challenge-response transaction.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: November 23, 2021
    Assignee: MELLANOX TECHNOLOGIES, LTD.
    Inventors: Elad Mentovich, Liron Mula, Yuval Itkin
  • Patent number: 11177886
    Abstract: A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: November 16, 2021
    Assignee: II-VI DELAWARE, INC.
    Inventors: Martin Williams, Yajun Wang, Eric Green, Aravanan Gurusami, Deepak Devicharan, Timothy Zahnley, Mike Burgess
  • Patent number: 11165472
    Abstract: A method and a user equipment having a plurality of antenna panels are provided. A set of transmission configuration indicator state configurations are received by the user equipment via a protocol layer above the physical layer, wherein each transmission configuration indicator state comprises an indication of an associated at least one reference signal which is used as a quasi co-location source for a resource and a quasi co-location type associated with the at least one reference signal. The at least one reference signal associated with the set of transmission configuration indicator state configurations are received, and a first subset of transmission configuration indicator states are determined based on the received at is least one reference signal associated with the set of transmission configuration indicator state configurations. An indication of the first subset of transmission configuration indicator states is then transmitted to a network entity.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: November 2, 2021
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Hyejung Jung, Ziad Ahmad, Vijay Nangia
  • Patent number: 11159202
    Abstract: Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: October 26, 2021
    Assignee: Transfert Plus Societe en Commandite
    Inventors: Frederic Nabki, Dominic Deslandes, Mohammad Taherzadeh-Sani, Michiel Soer
  • Patent number: 11115092
    Abstract: For example, a wireless station may be configured to modulate a plurality of data bit sequences into a plurality of data blocks according to a dual carrier modulation, to map the plurality of data blocks to a plurality of spatial streams according to a space-time diversity scheme, and to transmit a MIMO transmission based on the plurality of spatial streams.
    Type: Grant
    Filed: September 8, 2019
    Date of Patent: September 7, 2021
    Assignee: INTEL CORPORATION
    Inventors: Artyom Lomayev, Alexander Maltsev, Michael Genossar, Carlos Cordeiro
  • Patent number: 11095338
    Abstract: Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 17, 2021
    Assignee: Transfert Plus Societe en Commandite
    Inventors: Frederic Nabki, Dominic Deslandes, Mohammad Taherzadeh-Sani, Michiel Soer
  • Patent number: 11095466
    Abstract: A packet transmission control method used in a packet transmission circuit is provided that includes the steps outlined below. A packet receiving circuit, processing circuits and a packet sending circuit of the packet transmission circuit are kept in a non-operation status. The packet receiving circuit is woken up to the operation status to receive the packet stream and is restored to the non-operation status. The processing circuits are woken up to an operation status respectively according to an operation order thereof to receive, transmit and process the packet stream within a respective process time period and are restored to the non-operation status after the packet stream is processed. The packet sending circuit is woken up to the operation status to transmit the packet stream processed by the processing circuits to an external device and is restored to the non-operation status after the packet stream is transmitted.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: August 17, 2021
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventor: Chung-Chang Lin
  • Patent number: 11082280
    Abstract: System for adjusting a reference constellation for demodulating an optical signal include a coherent electro-optical receiver configured to convert a received optical signal to a plurality of electrical signals, an array of analog-to-digital convertors configured to digitize the plurality of electrical signals, and processor logic. The processor logic is configured to process the digitized plurality of electrical signals using a reference constellation to yield a plurality of decoded signals and a signal quality measurement. The reference constellation includes an inphase component equal to an ideal inphase component plus an inphase offset and a quadrature component equal to an ideal quadrature component plus a quadrature offset. The processor logic is configured to determine an optimal inphase offset and optimal quadrature offset. The processor logic is configured to update the reference constellation using the optimal inphase offset and the optimal quadrature offset.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: August 3, 2021
    Assignee: Google LLC
    Inventors: Hong Liu, Xiang Zhou
  • Patent number: 11076209
    Abstract: A reduced-complexity optical packet switch which can provide a deterministic guaranteed rate of service to individual traffic flows is described. The switch contains N input ports, M output ports and N*M Virtual Output Queues (VOQs). Packets are associated with a flow f, which arrive an input port and depart on an output port, according to a predetermined routing for the flow. These packets are buffered in a VOQ. The switch can be configured to store several deterministic periodic schedules, which can be managed by an SDN control-plane. A scheduling frame is defined as a set of F consecutive time-slots, where data can be transmitted over connections between input ports and output ports in each time-slot. Each input port can be assigned a first deterministic periodic transmission schedule, which determines which VOQ is selected to transmit, for every time-slot in the scheduling frame.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: July 27, 2021
    Inventor: Ted H. Szymanski
  • Patent number: 11070248
    Abstract: Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: July 20, 2021
    Assignee: Transfert Plus Societe en Commandite
    Inventors: Frederic Nabki, Dominic Deslandes, Mohammad Taherzadeh-Sani, Michiel Soer
  • Patent number: 11057074
    Abstract: A data and power communication cable that provides galvanic isolation between data-signal related circuitry and power-signal related circuitry present at both ends of the cable. The cable includes a first connector configured to mate with a first device to receive data and power signals therefrom; a first galvanic-isolating device configured to generate a galvanic-isolated data signal based on the data signal; a second galvanic-isolating device configured to generate a galvanic-isolated power signal based on the power signal; a second connector configured to mate with a second device to provide the galvanic-isolated data signal and the galvanic-isolated power signal thereto; a first set of communication mediums to route the data signal or the galvanic-isolated data signal from the first connector to the second connector; and a second set of communication mediums to route the power signal or the galvanic-isolated power signal from the first connector to the second connector.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: July 6, 2021
    Assignee: COSEMI TECHNOLOGIES, INC.
    Inventors: Devang Parekh, David Miller
  • Patent number: 11051030
    Abstract: A system and method for implementing a distributed source coding quantization scheme is provided. In one example, two independent but statistically correlated data sources can be asymmetrically compressed so that one source is compressed at a higher ratio than the other. The resulting signals are transmitted and decoded by a receiver. The highly compressed source can utilize the non-highly compressed source as side information so as to minimize the compression loss associated with the higher compression ratio. A conditional codebook can be created that not only depends on the highly compressed quantizer, but also depends on the quantized symbol received from the non-highly compressed data source.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: June 29, 2021
    Assignee: The MITRE Corporation
    Inventors: Robert M. Taylor, Jr., Jeffrey P. Woodard
  • Patent number: 11038661
    Abstract: A method and system for managing interference between a set of Light Fidelity (Li-Fi) access points is disclosed. The method includes receiving a plurality of uplink data frames. Each of the plurality of uplink data frames includes a response that includes one of an Acknowledgement (ACK) and a Negative Acknowledgment (NACK) for the associated downlink test frame and a Channel Quality Indication (CQI) for the associated Li-Fi access point. The method further includes detecting presence of the User Equipment (UE) in an interference region of the set of Li-Fi access points. The method includes attaching the UE with a first Li-Fi access point having the highest CQI and scheduling data transmission from the set of Li-Fi access points in a mutually exclusive time slot. The UE accepts data received from the attached Li-Fi access point and drops data received from remaining set of Li-Fi access points.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: June 15, 2021
    Assignee: Wipro Limited
    Inventors: Subhas Chandra Mondal, Shailesh Prabhu
  • Patent number: 11038615
    Abstract: A method of managing an optical communications network comprising a plurality of nodes interconnected by optical sections. The method comprises: identifying one or more pairs of adjacent DL-equipped nodes at which dummy light (DL) hardware is deployed, respective dummy light (DL) hardware being deployed at fewer than the plurality of the nodes of the optical communications network, the respective DL hardware deployed at a particular node configured to supply dummy light to each optical section extending from the particular node, and defining a respective single-section DL path between each identified pair of adjacent DL-equipped nodes; identifying one or more pairs of non-adjacent DL-equipped nodes at which DL hardware is deployed, and defining a respective multi-section DL path between each identified pair of non-adjacent DL-equipped nodes; and causing the deployed DL hardware to supply DL light to each of the single- and the multi-section DL paths.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: June 15, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hamid Mehrvar, Christopher Janz
  • Patent number: 11032056
    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: July 18, 2019
    Date of Patent: June 8, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: Prasanth Kemparaj, Satheesh Kumar S
  • Patent number: 11025474
    Abstract: A periodic phase modulation, having a period shorter than a symbol period, is applied as a source modulation, in addition to a symbol modulation, to signals transmitted between a transmitter and a receiver in a communication network. Symbol value elements can be sent from multiple transmitters (203, 303, 603, 703) to a receiver (607, 207) in the same symbol period can be processed on the basis of the source modulation without destructive interference. In some embodiments, the symbol value elements sent by different transmitters can be combined in the receiver. In some embodiments, symbol value elements sent by different transmitters can be distinguished in the receiver.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: June 1, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Marzio Puleri, Antonella Bogoni, Antonio D'Errico, Francesco Laghezza, Paolo Ghelfi, Teresa Pepe, Filippo Scotti