Patents Issued in January 12, 2016
  • Patent number: 9236911
    Abstract: Technologies for securely transferring whiteboard content data from a smart whiteboard device to another smart whiteboard device are disclosed. The smart whiteboard device may securely transfer the whiteboard content data to a mobile device. In response to receiving the whiteboard content data from the smart whiteboard device, the mobile device may transfer the received whiteboard content data to the other smart whiteboard device. The other smart whiteboard device may display the transferred whiteboard content data and enable manipulation thereof.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: January 12, 2016
    Assignee: Intel Corporation
    Inventors: Erik J. Johnson, Jasmeet Chhabra, Rita H. Wouhaybi
  • Patent number: 9236912
    Abstract: Generally, this disclosure provides systems, methods and platforms for power multiplexer switching operations. The system may include a near field communication (NFC) module configured to receive power through a radio frequency (RF) channel; a subscriber identity module (SIM) circuit configured with a supply voltage port; and a power multiplexer circuit configured to controllably couple the SIM circuit supply voltage port to the NFC module, wherein the NFC module provides a supply voltage to the SIM circuit such that the SIM circuit is operable in the absence of primary device power source.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: January 12, 2016
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Ni Sun, Jeongil Lee, Sam Zheng
  • Patent number: 9236913
    Abstract: A control device connected to a non-contact charging device for non-contact charging a portable device and a wireless communication device for communicating with an electronic key to operate an electrical component mounted in a vehicle, includes a memory that stores a wireless communication cycle for communication between the electronic key and the wireless communication device, a wireless communication control signal output part that outputs a wireless communication control signal for controlling operation of the wireless communication device, a non-contact charge control signal output part that outputs a non-contact charge control signal for controlling operation of the non-contact charging device, and a synchronizer that synchronizes the wireless communication control signal and the non-contact charge control signal with each other.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takuma Shimura, Yuji Mizuguchi, Kazuoki Otani
  • Patent number: 9236914
    Abstract: According to an aspect of the invention, an NFC device for communicating with an NFC reader is conceived, the NFC device comprising an NFC integrated circuit, an antenna unit connected to said NFC integrated circuit, and a detuning circuit, wherein the detuning circuit is arranged to cause a periodic detuning of the antenna unit to a detuned state, such that data transmission between the NFC device and the NFC reader may take place periodically while the NFC device and the NFC reader remain within communication range of each other.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: January 12, 2016
    Assignee: NXP, B.V.
    Inventors: Ruud Hendricksen, Oswald Moonen
  • Patent number: 9236915
    Abstract: A near field communications (NFC) device is disclosed that detects an envelope of a radio frequency (RF) signal. The NFC device includes a peak detector that determines the envelope of the RF signal. The peak detector compares a first differential signal voltage to a second differential signal voltage. The peak detector delays a rising edge of a first differential signal and provides the first differential signal voltage to the peak detector output when the first differential signal voltage is greater than the second differential signal voltage. The peak detector delays a falling edge of a second differential signal and provides the second differential signal voltage to the peak detector output when the second differential signal voltage is greater than the first differential signal voltage.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: January 12, 2016
    Assignee: Broadcom Corporation
    Inventors: Humberto Andrade Da Fonseca, Lance Rhys Trodd, Robin Wyndham John Wilson, David John Miles
  • Patent number: 9236916
    Abstract: Example embodiments presented herein are directed towards an eNodeB, and method therein, for generating downlink communications in a multiple antenna system. The method comprises transmitting, to a number of user equipments, a plurality of reference signals, where each signal is beamformed in a distinct direction within at least one correlated domain (e.g., elevation and/or azimuth). The eNodeB receives at least one CSI report from a specific user equipment and determines a primary reference signal based on, for example, the at least one CSI report. The eNodeB may thereafter generate downlink communication signals for antenna element(s) and/or subelements of the multiple antenna system. The downlink communication signals are beamformed into a transmitting direction that aligns most closely with a beamforming direction of the at least one primary reference signal, as compared to any other beamforming direction of the reference signals.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: January 12, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON
    Inventors: Niklas Wernersson, David Hammarwall, Svante Bergman
  • Patent number: 9236917
    Abstract: A method of supporting communication of a terminal in a first base station of a beamforming system is provided. The method includes determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell, and transmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: January 12, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Su-Ryong Jeong, Hyun-Kyu Yu, Jeong-Ho Park, Ji-Yun Seol
  • Patent number: 9236918
    Abstract: A MIMO transmitting apparatus, receiving apparatus, transmission signal formation method, and transmission signal separation method with improved transmission efficiency. In communication apparatus, a mapping unit maps code words into a transmission stream on a per code-block basis and changes, between when a transport block is initially transmitted and when the transport block is retransmitted, the combinations of the code blocks mapped in the same transmission zone. In the communication apparatus, an interference replica generation unit forms, based on the decoded data of successfully decoded code blocks, an interference replica signal corresponding to the successfully decoded code blocks, and a signal separation unit removes, from a plurality of reception streams received this time, the interference replica signal formed by the interference replica generation unit received before the last time reception streams was received and then separates the reception streams received this time into each stream.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: January 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takashi Toda, Masaru Fukuoka, Sadaki Futagi, Masayuki Hoshino
  • Patent number: 9236919
    Abstract: The present invention discloses a MIMO wireless communication method functioning through a main wireless communication device and comprising: acquiring a transmission opportunity; issuing an distributed MIMO initiation frame including a transmission duration, a number Ns1 of transmission spatial stream(s), and a number Nr1 of reception spatial streams which an intended receiver is operable to process; receiving an initial portion which an attendant wireless communication device sends in response to the distributed MIMO initiation frame, or issuing the initial portion after reaching a time limit; and transmitting a distributed MIMO packet to the intended receiver while the attendant wireless communication device is allowed to transmit another distributed MIMO packet to the intended receiver or another intended receiver concurrently, wherein the sum of the number Ns1 and a number Ns2 of transmission spatial stream(s) of the attendant wireless communication device is equal to or less than the number Nr1.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: January 12, 2016
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: John Timothy Coffey, Der-Zheng Liu
  • Patent number: 9236920
    Abstract: For each base station of K base stations of a cellular communications network a maximum number of wanted data streams per carrier is decided that is to be scheduled to a terminal accessing the cellular communications network. The terminal has NR receive antennas and K is an integer equal to or greater than two. Information regarding the decision is signaled to at least one of the K base stations.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: January 12, 2016
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Patrick Marsch, Hans Thomas Hoehne, Krystian Pawlak
  • Patent number: 9236921
    Abstract: The present invention discloses a method and an apparatus for implementing multi-cell precoding. Users can be divided into center users and edge users according to areas, and the divided center users and edge users are processed by adopting different precoding methods. The method and apparatus of the present invention make the users located at the edge of the cell cluster and in the center of the cell cluster can be distinguished to be processed, thereby greatly optimizing and improving the rate of the entire multi-cell MIMO system; and make the interference received by the target user at users of the multi-cell edge has a clear definition and a measurement method. The aforementioned characteristics can guarantee to achieve an effective suppression for the communication interference in a heterogeneous network.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: January 12, 2016
    Assignee: ZTE Corporation
    Inventor: Wei Wei
  • Patent number: 9236922
    Abstract: A communication method of a base station and a terminal based on interference alignment in a multi-cell multi-user multiple-input multiple-output (MIMO) interference channel and a method and apparatus of communication using interference alignment and block successive interference pre-cancellation in a multi-user MIMO interference channel. The base station may determine a precoding matrix to maximize a signal to interference and noise ratio (SINR) and a signal to leakage and noise ratio (SLNR) in the interference channel, and a terminal communicating with the base station may determine a decoding matrix to align interference. The transmitter including a multicell interference channel may calculate a rotation matrix for interference alignment, identify effective symbol vectors using the rotation matrix, and generate a transmit signal of a target transmitter to pre-cancel interference corresponding to a transmit signal of a neighboring transmitter.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: January 12, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Hyun Park, Sung Jin Yoo, Myung Sun Song, Byung Jang Jeong, Jae Ick Choi
  • Patent number: 9236923
    Abstract: A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: January 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 9236924
    Abstract: Method and arrangement in a user equipment for adjusting signals transmitted in uplink to a network node based on a feedback value received from the network node. The method includes transmitting a signal, to be received by the network node. A feedback signal is received from the network node, providing feedback on the transmitted signal. A value of a time delay of the received feedback signal is obtained. Signals transmitted in the uplink are adjusted according to the received feedback signal to compensate for the obtained time delay value of the received feedback signal. Related methods and arrangements in a network node are presented.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: January 12, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON
    Inventors: Jinhua Liu, Muhammad Kazmi, Qingyu Miao
  • Patent number: 9236925
    Abstract: A method of transmitting modulation and coding scheme (MCS) feedback (MFB) in a wireless local area network system is provided. The method is performed by a first station and includes receiving, from a second station, a physical layer convergence procedure (PLCP) protocol data unit (PPDU), estimating a MFB based on the PPDU and transmitting, to the second station, feedback information including a MFB field and a MFB type field. The MFB field includes the MFB and the MFB type field indicates whether or not the MFB is in response to a MFB request (MRQ) of the second station.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: January 12, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Dae Won Lee, Byeong Woo Kang, Yong Ho Seok, Dong Wook Roh
  • Patent number: 9236926
    Abstract: A method for providing precoding weights for data symbols of data control subframes includes generating a downlink frame having control subframes which individually correspond to one of a plurality of downlink data subframes, and inserting weight information into each of the control subframes, such that the weight information is to be applied to data symbols present in the corresponding one of the data subframes. The method further includes transmitting the control subframes and the inserted weight information to a receiving device.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: January 12, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Youn Seo, Bong Hoe Kim, Young Woo Yun, Ki Jun Kim, Jung Hoon Lee, Eun Sun Kim, Hak Seong Kim, Suk Hyon Yoon, Joon Kui Ahn
  • Patent number: 9236927
    Abstract: A transmission apparatus and method, respectively, mapping payload data of mapping input data streams onto a mapping output data stream having a channel bandwidth for transmission in a multi-carrier broadcast system. To enable selection of robustness for transmission of data, the apparatus includes a frame forming mechanism mapping data blocks of at least two mapping input data streams onto frames of the mapping output data stream covering the channel bandwidth, each frame including a payload portion, the payload portion including plural data symbols and being segmented into data segments each covering a bandwidth portion of the channel bandwidth. The frame forming mechanism is configured to map the data blocks of the at least two mapping input data streams onto data symbols of the payload portion and includes a MIMO mode selector selecting a MIMO mode of the data blocks per data segment and/or per mapping input data stream.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: January 12, 2016
    Assignee: Sony Corporation
    Inventors: Lothar Stadelmeier, Nabil Loghin, Joerg Robert, Samuel Asangbeng Atungsiri
  • Patent number: 9236928
    Abstract: An apparatus and method for operating a Multiple Input Multiple Output (MIMO)-capable subscriber node are disclosed. In one embodiment, an apparatus includes a MIMO-capable physical layer transceiver and a Medium Access Control (MAC) layer block that measures a received transmission to determine channel conditions. Upon receiving a transmission wherein said channel conditions meet specified conditions, the MAC layer block transmits a message to an access point indicating that the apparatus wants to switch between a non-MIMO mode and a MIMO mode, and upon receiving an acknowledgement, the MAC layer block switches between the non-MIMO mode and the MIMO mode. An apparatus for operating an access node is also disclosed.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: January 12, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Ozgur Gurbuz, David Pignatelli, David Stephenson, Eldad Perahia, Bretton Douglas, Ender Ayanoglu
  • Patent number: 9236929
    Abstract: Methods and apparatus are provided for allowing a transmitter (Tx) to perform antenna selection independently of a receiver (Rx) in a transceiver supporting both transmit diversity and receive diversity. Certain aspects may utilize a cross switch, which may be used in a parallel or cross configuration, to provide for the independent antenna selection, such that the Rx may maintain the ability to operate on the same antenna as the Tx, on another antenna, or on both antennas for enhanced receive diversity. Furthermore, certain aspects may employ additional switching in the baseband domain in an effort to avoid, or at least reduce, switching glitches in the Rx caused by changing the cross switch configuration. In this manner, the Rx need not re-converge upon antenna switching.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: January 12, 2016
    Assignee: Qualcomm Incorporated
    Inventors: Christos Komninakis, Daniel F. Filipovic, Chengjin Zhang
  • Patent number: 9236930
    Abstract: Systems and techniques for management of an antenna tuning frequency range. Frequency coverage needed for an antenna used in a portable communications device in a wireless communication network is determined based on communication protocols being used, with an active tuner being connected to a passively tuned antenna when a different frequency range is called for and with the active tuner being effectively isolated when only the range provided by the passively tuned antenna is needed to reduce the risk of RF mixing or intermodulation.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: January 12, 2016
    Assignee: Nokia Technologies Oy
    Inventors: Niels Bonne Larsen, Kevin Li
  • Patent number: 9236931
    Abstract: A relay device according to the present invention includes: a receiving unit which receives a frame; a transmitting unit which transmits a frame; a frame determination unit which stores therein the first frame when the frame determination unit determines that the received frame is the first frame; a proxy ACK generation unit which generates a third frame which is a proxy frame of a second frame which is a frame to be transmitted from the receiving device, as a receipt acknowledgement to the first frame; and a communication control unit which: causes the transmitting unit to transmit the third frame; sets an extended active period in the inactive period subsequent to the active period; and transmits the first frame in the extended active period when the receiving unit does not receive the second frame within a predetermined period after reception of the first frame.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: January 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yosuke Ukita, Hironori Nakae, Hiroshi Hayashino
  • Patent number: 9236932
    Abstract: A configuration method of a multimedia system comprising a first device and at least one adjacent device having a mechanism to communicate with the first device. The first device comprises a mechanism to read/write data from/to an NFC data carrier. The method comprises a set-up phase and an exploitation phase.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: January 12, 2016
    Assignee: NAGRAVISION S.A.
    Inventor: Frederic Thomas
  • Patent number: 9236933
    Abstract: Provided is an apparatus and method for transmitting and receiving data using multiple paths in a wireless communication system using a distributed Media Access Control (MAC). More particularly, provided is an apparatus and method for transmitting and receiving data that may select a path with a better channel status from multiple paths that include a direct path using a Line of Sight (LOS) and a relay path passing through a relay apparatus, in a wireless communication system that may transmit data via the LOS using a distributed MAC and a directional antenna.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: January 12, 2016
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyoung Jin Kwon, Jin Kyeong Kim, Yong Sun Kim, Kyeongpyo Kim, Seung Eun Hong, Woo Yong Lee
  • Patent number: 9236934
    Abstract: Disclosed is a satellite communication system that allocates bandwidth to maximize the capacity of the communication system while providing service to geographical areas having different demands. A smaller portion of the frequency spectrum can be allocated for subscriber beams that supply service to low demand areas. A larger portion of the frequency spectrum can be provided to subscriber beams that provide access to high demand areas. Allocation of bandwidth can be determined by the amount of demand in low demand areas versus the amount of demand in high demand areas. High demand gateways are physically located in low demand subscriber beams, while low demand gateways are physically located in high demand subscriber beams, which prevents interference.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: January 12, 2016
    Assignee: VIASAT, INC.
    Inventor: Erwin C. Hudson
  • Patent number: 9236935
    Abstract: The present application relates to a system and method for data transmission. The system includes a transmitter for transmitting user data over a transmission link in a format in which the user data is adapted to suit the properties of the transmission link. On the transmit side, an input data stream in a tunnelled format containing the user data to be transmitted is received, and a breakout device is operative to extract the user data from the input data stream and to output the extracted user data to the transmitter, which transmits the user data in the adapted format. On the receive side, a capture device receives the transmitted user data and re-formats the received user data into an output data stream in the tunnelled format, such that the output data stream from the capture device resembles the input data stream to the breakout device.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: January 12, 2016
    Assignee: QUORTUS LIMITED
    Inventors: Riki Benjamin Dolby, Andrew James Odgers
  • Patent number: 9236936
    Abstract: Systems and methods for performing preprocessing of received data packets, to reduce processing burdens and improve efficiency of communications terminal receivers, are provided. A first stage filter receives a data frame comprising data packets representing respective encapsulated fragments of a PDU. The first stage filter parses a header of one of the packets to locate a start field, and determines whether the start field indicates that the packet comprises a start fragment of the PDU. When the start field indicates that the packet comprises the start fragment, the first stage filter determines, based on packet label information of the packet header, whether to forward the packet to a second stage filter or to discard the packet, and forwards or discards the packet accordingly. When the start field indicates that the packet does not comprise the start fragment, the first stage filter forwards the packet to the second stage filter.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: January 12, 2016
    Assignee: Hughes Network Systems, LLC
    Inventors: Liming Qin, Alexei Duhovich, Chetan Tekur
  • Patent number: 9236937
    Abstract: An eNB 100-1 that performs radio communication by using the adaptive array control in the TD-LTE system: receives SRS utilized in the adaptive array control from a plurality of UEs 200; and performs an assignment for each subject downlink RBG, out of a plurality of downlink RBGs. The eNB assigns the subject downlink RBG to a UE 200 that transmitted a specific SRS that is SRS having the highest match rate in a frequency band with the subject downlink RBG, out of a plurality of SRSs received recently before the subject downlink RBG.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: January 12, 2016
    Assignee: KYOCERA Corporation
    Inventor: Tooru Sahara
  • Patent number: 9236938
    Abstract: The present invention relates to methods and arrangements for improving the capabilities of an evolved Universal Terrestrial Radio Access Network, in particular for cases when more than one radio access network applying a time-division duplex transmission mode need to co-exist on a same carrier. The invention addresses further problems concerning an efficient allocation of uplink resources and resource allocation in a handover situation. The present invention assigns an attribute in form of a distinguishing value to the time slots used for the uplink and downlink transmission on said carrier such as to avoid scheduling of transmissions via a first radio access network in downlink or uplink time slots assigned to the second radio access network and to avoid scheduling of transmissions via the second radio access network in uplink time slots assigned for transmissions in the first radio access network.
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: January 12, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Parkvall, Erik Dahlman, Walter Müller, Göran Rune
  • Patent number: 9236939
    Abstract: A system and method involve detecting a modulated optical signal from an atmospheric propagation channel, wherein the modulated optical signal comprises an optical signal from an optical source modulated with a periodic signal at a modulation frequency greater than the bandwidth of the turbulence within the atmospheric propagation channel, and converting the detected modulated optical signal into a digitized electrical signal. The method also includes determining the root mean square signal power of an AC component of the digitized electrical signal at the modulation frequency. The method further includes determining the power spectral density of the digitized electrical signal, determining the magnitude of the peak component at the modulation frequency, and determining the effective optical depth of the atmospheric propagation channel using the magnitude of the peak component at the modulation frequency.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: January 12, 2016
    Assignee: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
    Inventors: David T. Wayne, Colin N. Reinhardt
  • Patent number: 9236940
    Abstract: A method of analyzing an input signal, the method including the steps of: (a) dividing a first input signal into first and second orthogonal signal polarization components; (b) dividing a second input signal into orthogonal first and second orthogonal local polarization components; (c) mixing the first orthogonal signal component with the second orthogonal local polarization component to provide a first mixed signal; (d) mixing the second orthogonal signal component with the first orthogonal local polarization component to provide a second mixed signal; (e) analyzing the first and second mixed signal to determine the polarization or phase information in the input signal.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: January 12, 2016
    Assignee: Finisar Corporation
    Inventor: Steven James Frisken
  • Patent number: 9236941
    Abstract: A system for implementing a radio over fiber (RoF) transmission in a passive optical network (PON), said passive optical network comprising a trunk line, a remote node, and a plurality of leaf nodes connected to said remote node, wherein one of said plurality of leaf nodes comprises a baseband processing unit for performing a baseband processing on a signal received via said trunk line to perform the transformation to radio over fiber by generating a radio over fiber signal and to forward the resulting radio over fiber signal to said remote node, wherein said remote node is adapted to forward the radio over fiber signal received from said leaf node to the other leaf nodes of said passive optical network.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 12, 2016
    Assignee: NTT DOCOMO, INC.
    Inventor: Wolfgang Kiess
  • Patent number: 9236942
    Abstract: This disclosure provides systems, methods and apparatus of establishing a free-space communication link through a medium. The medium can be an occluded environment with increased absorption and/or scattering effects. The free-space communication link includes a transmitter configured to transmit an optical signal at a wavelength suitable for transmission through the medium without suffering excessive optical losses due to absorption and/or scattering effects. The free-space communication link includes a receiver configured to receive the transmitted optical signal. The transmitter-receiver pair is configured to efficiently transmit optical signals at the suitable wavelength over a distance between about 1 mm and about 50 m. The transmitter and the receiver can be configured as portions of a fiber-optic connector assembly that can be used to connect two fiber-optic cables in an occluded environment.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: January 12, 2016
    Assignee: L-3 Communications Corporation
    Inventors: Brian Edward Roberds, Timothy Clyde Collins, Jayant Kumar Gupta, Jaclyn Marie Nascimento, Gregory Joseph Pietrangelo, Michael John Talmadge, Nathan Verner Whittenton, Thomas Karl Berger, Christopher Ryan Collins, Tristan Dennis Jones
  • Patent number: 9236943
    Abstract: There is provided a method of eliminating an offset in a spot centroid due to crosstalk. A crosstalk matrix is used to characterize crosstalk characteristics of a multi-pixel spot-centroid detector. Left-multiplication of signals outputted from the multi-pixel spot-centroid detector, which are affected by the crosstalk, by an inverse matrix of the crosstalk matrix can result in a light-intensity-distribution signal with impacts of the crosstalk substantially removed. Based on this light-intensity-distribution signal, it is possible to derive the spot centroid, with the offset in the spot centroid due to the crosstalk substantially eliminated, resulting in an improved accuracy of the spot centroid detection, as compared with conventional methods.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: January 12, 2016
    Assignee: The Institute of Optics and Electronics, The Chinese Academy of Sciences
    Inventors: Xiaoyu Ma, Changhui Rao, Kai Wei
  • Patent number: 9236944
    Abstract: A method for providing access to a passive optical network for services to homes or businesses from two or more telecommunications service providers and a billing means is described. A first service provider connects to a point of presence at one side of passive optical network. The provider transmits the appropriate services through this network to an authorization receiver. The authorization receiver is used to receive a periodic authorization code from the network provider to enable the appropriate services from the service provider to be transmitted to a subscriber at a home or business. The authorization receiver enables an optical fiber path to be established for the services to flow to and from the home or business.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: January 12, 2016
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: James Lloyd McNaughton, Randall Lee Markway
  • Patent number: 9236945
    Abstract: A thermally shielded multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The multi-channel TOSA generally includes an array of lasers optically coupled to an arrayed waveguide grating (AWG) to combine multiple optical signals at different channel wavelengths. A plurality of laser array thermal shields are thermally coupled to a temperature control device, such as a thermoelectric cooler (TEC), and thermally shield the respective lasers in the laser array in separate thermally shielded compartments. Each of the lasers may also be individually thermally controlled to provide a desired wavelength, for example, using a heater and/or cooler located in each thermally shielded compartment. The optical transceiver may be used in a wavelength division multiplexed (WDM) optical system, for example, in an optical line terminal (OLT) in a WDM passive optical network (PON).
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: January 12, 2016
    Assignee: Applied Optoelectronics, Inc.
    Inventors: I-Lung Ho, Jun Zheng, Luohan Peng
  • Patent number: 9236946
    Abstract: A gearbox IC is incorporated into an optical communications system to enable an optical link that incorporates the system to achieve data rates that are at least double that which are currently achievable in optical links. The gearbox IC is compatible with ASIC designs currently used in optical fiber links. The gearbox IC enables the data rate of the optical fiber link to be dramatically increased without requiring a redesign of the ASIC that is currently used in the optical fiber link. The gearbox IC performs data rate conversion and phase alignment for bit streams being transferred via the gearbox IC between the ASIC and an optical transceiver module of the optical communications system.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: January 12, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Faouzi Chaahoub, Georgios Asmanis
  • Patent number: 9236947
    Abstract: A thin-film Light Emitting Diode (LED) and methods of manufacturing the same are disclosed. Specifically, the thin-film LED is provided with an epitaxial layer having a proton implantation that controls the size of the active volume. Controlling the size of the active volume enables the thin-film LED to enjoy decreased rise and fall times, thereby achieving a thin-film LED that is useable for transmission in high transmission rate communication systems.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: January 12, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Nikolaus W. Schunk
  • Patent number: 9236948
    Abstract: An optical link power management scheme takes the best advantage of a dynamic connection environment, where ports may be connected and disconnected at any time, and where data flows may start and stop as needed by the applications using the high speed data links Power consumption is optimized, eye safety standards are met, and robust connection detection is preserved.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: January 12, 2016
    Assignee: INTEL CORPORATION
    Inventors: Klaus D. Giessler, Christine M. Krause
  • Patent number: 9236949
    Abstract: An optical transceiver generally includes an injection locked (IL) laser configured to generate a transmit (Tx) optical signal for transmission over an optical network and a laser driver circuit configured to modulate the IL laser based on a Tx data signal. The Tx data signal may be provided to the optical transceiver for transmission over the optical network. The Tx data signal may include a crossing point level associated with a transition between a first signal level and a second signal level. The optical transceiver may also include a crossing point control circuit configured to apply distortion to the Tx data signal, the distortion to increase the crossing point level.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: January 12, 2016
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Yi Wang, Huanlin Zhang
  • Patent number: 9236950
    Abstract: A method for determining a presence of a locking signal in a signal received by an optical receiver device, the optical receiver device configured to be used in an optical communications network, the locking signal being a signal exchanged by optical communication devices of the optical communications network in a phase preceding setting up communications between the optical communication devices. The presence of the locking signal is determined by obtaining a direct current component or a component at twice a frequency at which the locking signal is supposed to be modulated, and by obtaining a contribution of the communication signal, if any, on the component.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: January 12, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Gwillerm Froc
  • Patent number: 9236951
    Abstract: An optical signal (116) is modulated with a transmitted electrical signal comprising an information-bearing component (122) and a pilot tone (120) having a predetermined frequency. Transmission of the signal results in distortion, including nonlinear optical transmission impairments. A method of receiving the signal includes detecting the optical signal to produce a received electrical signal (X) comprising a distorted variant of the transmitted electrical signal. The pilot tone is extracted from the received electrical signal using a filtering operation (308) having a predetermined characteristic, and a compensation signal determined based upon the extracted pilot tone. The compensation signal is applied to the received electrical signal (X) to produce a compensated signal (Y) having reduced distortion.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: January 12, 2016
    Assignee: OFIDIUM PTY. LTD.
    Inventors: Arthur James Lowery, Liang Bangyuan Du
  • Patent number: 9236952
    Abstract: An optical receiver receives an optical signal with a phase error and pilot symbols, and converts the optical signal into an electrical signal. The optical receiver identifies, based on the pilot symbols, a cycle slip due to the phase error and associated with a transition time. The optical receiver determines, based on the pilot symbols, a direction and a center of the cycle slip, and generates a rotation value based on the direction and the center. The optical receiver applies the rotation value to minimize the phase error in the electrical signal except for phase error associated with the transition time and to generate a modified electrical signal. The optical receiver generates an erase signal based on the transition time and the center of the cycle slip, and uses the erase signal to minimize an effect of the phase error associated with the transition time of the cycle slip.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: January 12, 2016
    Assignee: Infinera Corporation
    Inventors: Han H. Sun, John D. McNicol, Kuang-Tsan Wu
  • Patent number: 9236953
    Abstract: A method, a system, and a network for coordination between a data control plane and photonic control in a network include operating the data control plane with photonic control messaging included therein, wherein the data control plane is configured to at least establish end-to-end paths between a plurality of network elements at Layer 1; transmitting a photonic control message in or by the data control plane responsive to a requirement for photonic layer information; processing, via the data control plane, the photonic layer information received from photonic control responsive to the photonic control message, wherein the photonic control is configured to adjust photonic hardware responsive to a change at a photonic layer; and performing an action by the data control plane considering the photonic layer information.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 12, 2016
    Assignee: Ciena Corporation
    Inventors: Mohit Chhillar, Anurag Prakash, Rajagopalan Kannan, Dominic Richens, Hari Srinivasan
  • Patent number: 9236954
    Abstract: A photocoupler comprises an input side lead frame; an output side lead frame disposed facing the input side lead frame with a gap therebetween; a light emitting device mounted on a face of the input side lead frame facing the output side lead frame side; a light receiving device mounted on a face of the output side lead frame facing the input side lead frame side, opposite to and having a gap with the light emitting device; and a protrusion disposed on at least a part of an area around the light receiving device on the output side lead frame and being formed of conductive bonding wire or a bump, protruding to the input side lead frame side.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: January 12, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuhiro Mitamura, Shigeru Moribayashi, Ryuta Yaginuma
  • Patent number: 9236955
    Abstract: By using reconfigurable antenna based pattern diversity, an optimal channel can be realized in order to maximize the distance between two subspaces, thereby increasing sum-rate. The inventors show the benefits of pattern reconfigurability using real-world channels, measured in a MIMO-OFDM interference network. The results are quantified with two different reconfigurable antenna architectures. An additional 47% gain in choral distance and 45% gain in sum capacity were achieved by exploiting pattern diversity with IA. Due to optimal channel selection, the performance of IA can also be improved in a low SNR regime.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: January 12, 2016
    Assignees: Drexel University, The Trustees Of The University Of Pennsylvania
    Inventors: Rohit Bahl, Nikhil Gulati, Kapil R. Dandekar, Dwight L. Jaggard
  • Patent number: 9236956
    Abstract: A frequency control apparatus includes: an input operation unit which detects a presence/absence of an input of a predetermined operation by an operator; and a control unit which, when the input of the predetermined operation by the input operation unit is detected, calculates radio frequencies, each of the radio frequencies being where a minimum value of differences with respect to multiplied frequencies of a current drive frequency of a device is less than or equal to a predetermined value, and which changes the current drive frequency of the device so that minimum values of differences between the calculated radio frequencies and multiplied frequencies of the changed drive frequency are greater than or equal to a predetermined value. The control unit changes the drive frequency to lessen a change width before and after the change by either increasing the drive frequency or decreasing the drive frequency.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: January 12, 2016
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Hirokazu Kanahara, Katsumi Kanasugi, Yoshihiro Mishio, Shinichi Arie
  • Patent number: 9236957
    Abstract: RF switching circuitry includes an RF switch coupled between an input node and an output node. Distortion compensation circuitry is coupled in parallel with the RF switch between the input node and the output node. The RF switch is configured to selectively pass an RF signal from the input node to the output node based on a first switching control signal. The distortion compensation circuitry is configured to boost a portion of the RF signal that is being compressed by the RF switch when the amplitude of the RF signal is above a predetermined threshold by selectively injecting current into one of the input node or the output node. Boosting a portion of the RF signal that is being compressed by the RF switch allows a signal passing through the RF switch to remain substantially linear, thereby improving the performance of the RF switching circuitry.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: January 12, 2016
    Assignee: RF Micro Devices, Inc.
    Inventors: Eric K. Bolton, Daniel Charles Kerr, Marcus Granger-Jones
  • Patent number: 9236958
    Abstract: A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 12, 2016
    Assignee: Skorpios Technologies, Inc.
    Inventors: Robert J. Stone, Stephen B. Krasulick
  • Patent number: 9236959
    Abstract: Disclosed are a method and system for testing the isotropic sensitivity of a terminal, comprising: testing the received signal strength of a terminal at every theta/phi angle and antenna polarization direction, and generating a received signal strength pattern and a table of the correspondence between base station power and the received signal strength of the terminal; finding the best theta/phi angle and antenna polarization direction and testing the corresponding effective isotropic sensitivity; calculating the effective isotropic sensitivity at other theta/phi angles and polarization directions and integrating these to obtain the isotropic sensitivity of the terminal. The present invention thereby effectively reduces testing time and improves testing efficiency.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: January 12, 2016
    Assignee: Huizhou TCL Mobile Communication Co., Ltd.
    Inventor: Jian Bai
  • Patent number: 9236960
    Abstract: A calibration circuit for calibrating harmonics in a mixer. The calibration circuit includes an RF signal path configured to receive an RF signal corresponding to an output of the mixer, selectively receive a test signal injected into the RF signal path, and provide feedback to the mixer according to the RF signal and/or the test signal. The test signal corresponds to a selected harmonic of the harmonics in the mixer. A measurement circuit is configured to detect, in the output of the mixer, the test signal injected into the RF signal path. A calibration module is configured to receive a feedback signal indicative of the test signal detected in the output of the mixer and, based on the feedback signal indicative of the test signal detected in the output of the mixer, adjust a duty cycle associated with the mixer to calibrate the selected harmonic.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 12, 2016
    Assignee: Marvell International Ltd.
    Inventors: Carlo Tinella, Fernando De Bernardinis, Jody Greenberg