Patents Examined by Wednel Cadeau
  • Patent number: 10129017
    Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides a technique for detecting loss of signal. An incoming data stream is sampled and a recovered clock signal is generated accordingly. An output clock signal of a higher frequency than the recovered clock signal is generated by a transmission PLL. The frequency of the recovered clock signal is compared to a divided frequency of the output clock signal. If a difference between the recovered clock signal and the output clock signal is greater than a threshold, a loss of signal indication is provided. There are other embodiments as well.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 13, 2018
    Assignee: INPHI CORPORATION
    Inventors: Parmanand Mishra, Simon Forey
  • Patent number: 10120346
    Abstract: A satellite radio wave receiving processing unit 60 includes a front end 60a which receives a radio wave including a code signal transmitted from a satellite, and a baseband unit 64 which acquires the code signal from the received radio wave, in which the baseband unit identifies a pseudo-random code sequence used for performing spread spectrum to the code signal and a phase of the pseudo-random code sequence in a transmission period, identifies a code type of the code signal every time according to the transmission period, identifies, by comparing an array of the identified code type with a plurality of comparison arrays expected to appear as the array of the code type, a head timing of each code in the code signal according to a comparison array in which a result of the comparison satisfies a predetermined condition, and identifies each code in synchronization with the identified head timing.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 6, 2018
    Assignee: CASIO COMPUTERS CO., LTD.
    Inventors: Takeshi Matsue, Hideo Abe, Tatsuya Sekitsuka
  • Patent number: 10110402
    Abstract: A PAM4 signal generation apparatus is provided. The PAM4 signal generation apparatus includes a DFB, two EA modulators, an SOA, a PSR, a direct-current power source, two electrical-signal generators, and two amplitude-limiting amplifiers. The two electrical-signal generators and the two amplitude-limiting amplifiers are used to generate two NRZ electrical signals respectively, the DFB outputs two optical signals, the SOA amplifies an optical power of one of the optical signals, the two EA modulators use the NRZ electrical signals and the optical signals including “a large signal and a small signal” respectively to generate two NRZ optical signals respectively, and the two NRZ optical signals are multiplexed by the PSR to generate a PAM4 electrical signal. According to this apparatus, a linearity requirement is greatly lowered. PAM4 modulation is performed in an optical domain, and this prevents a PAM4 signal from being generated on an electrical signal.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: October 23, 2018
    Assignee: Hisilicon Optoelectronics Co., Limited
    Inventors: Hongmin Chen, Zhenwei Cui, Xi Huang
  • Patent number: 10103779
    Abstract: In a powerline communications (PLC) network having a first node and at least a second node on a PLC channel utilizing a band including a plurality of tones, based on at least one channel quality indicator (CQI), the first node allocates for a tone map response payload only a single (1) power control bit for each of a plurality of subbands having two or more tones. The power control bit indicates a first power state or a second power state. The first node transmits a frame including the tone map response payload to the second node. The second node transmits a frame having boosted signal power for the tones in the subbands which have the first power state compared to a lower signal power for the tones in the subbands which have the second power state.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Il Han Kim, Anand G. Dabak, Tarkesh Pande
  • Patent number: 10075220
    Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). The present disclosure relates to channel information feedback in a wireless communication system, and an operation method of a receiving node includes: determining compressed channel information based on an eigenvalue decomposition of a covariance matrix regarding a channel, and transmitting, to a transmitting node, a direction index and a magnitude index representing the compressed channel information. Herein, a dimension of the compressed channel information is lower than a dimension of channel information associated with the transmitting node. Also, the disclosure includes other embodiments, different from the above described embodiment.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: September 11, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Keonkook Lee, Lua Ngo, Byonghyo Shim, Byungju Lee, Taeyoung Kim, Jiyun Seol
  • Patent number: 10069576
    Abstract: An interference suppression system comprises an antenna, a control module, a receiving and sending module, a radio frequency (RF) sending channel, a power amplifier (PA), a RF receiving channel, a first filter module, and a power detecting module. The control module adjusts the first filter module frequency band to achieve filter feedback to the PA input end. The interference suppression system applies multiple feedbacks to enhance suppression capability, and reduces interference from RF sending channel to RF receiving channel because of PCB signal leakage and mutual interference between this system and adjacent systems.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: September 4, 2018
    Assignees: HONG FU JIN PRECISION (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Yang-Han Lee
  • Patent number: 10061740
    Abstract: A receiver includes first, second, and third signal processors and a controller. The first signal processor provides a first signal in response to detecting a first attribute of a received signal. The second signal processor provides a second signal in response to detecting a second attribute of the received signal. The third signal processor provides a third signal in response to detecting a third attribute of the received signal and provides packet data. The controller enables the first signal processor in response to a receive enable signal, controls the third signal processor to provide the packet data in response to receiving the first signal and the third signal, and initializes the first signal processor and the third signal processor in response to receiving the first signal and the second signal.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: August 28, 2018
    Assignee: SILICON LABORATORIES INC.
    Inventors: Hendricus de Ruijter, Wentao Li
  • Patent number: 10044545
    Abstract: A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to perform demodulation on the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frequency de-interleaver to frequency de-interleave the demodulated broadcast signals by using a different interleaving sequence, wherein the different interleaving sequence is used for data corresponding to an OFDM symbol pair or data corresponding to an OFDM symbol according to an FFT size of the demodulation, a frame parser to parse at least one signal frame from the frequency de-interleaved broadcast signals and a decoder to decode service data in the parsed at least one signal frame.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: August 7, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Woosuk Ko, Sungryong Hong
  • Patent number: 10044497
    Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides a technique for detecting loss of signal. An incoming data stream is sampled and a recovered clock signal is generated accordingly. An output clock signal of a higher frequency than the recovered clock signal is generated by a transmission PLL. The frequency of the recovered clock signal is compared to a divided frequency of the output clock signal. If a difference between the recovered clock signal and the output clock signal is greater than a threshold, a loss of signal indication is provided. There are other embodiments as well.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: August 7, 2018
    Assignee: INPHI CORPORATION
    Inventors: Parmanand Mishra, Simon Forey
  • Patent number: 10008457
    Abstract: Coupled resonators for galvanically isolated signaling between integrated circuit modules. An illustrative multi-module integrated circuit comprises: a transmitter in a first module, the transmitter providing a modulated carrier signal; a receiver in a second module demodulating the modulated carrier signal; and a galvanically isolated signaling path that includes: a first integrated resonator in the first module and a second integrated resonator in the second module, the first and second integrated resonators being resonantly coupled to convey the modulated carrier signal from the transmitter to the receiver.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: June 26, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Richard Scott Burton, Karel Ptacek
  • Patent number: 9985808
    Abstract: Aspects of the present disclosure provide an apparatus and techniques for managing interference across operators. A base station identifies a first region of a first frequency spectrum assigned to a first operator, wherein uplink and downlink subframe configurations for Time Division Duplex (TDD) communications using the first region and a first region of a second frequency spectrum assigned to a second operator are synchronized between the first and second operator. The base station further identifies a second region of the first frequency spectrum, wherein uplink and downlink subframe configurations for TDD communications using the second region and a second region of the second frequency spectrum are not synchronized between the first and second operator. The base station communicates with one or more user equipments using the first and second region of the first frequency spectrum.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: May 29, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Krishna Kiran Mukkavilli, Naga Bhushan
  • Patent number: 9985618
    Abstract: An apparatus includes a phase detector coupled to an output of a frequency multiplier. A digital loop filter is coupled to the phase detector, and a duty cycle correction circuit is coupled to the digital loop filter.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: May 29, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Dongmin Park, Jong Min Park, Lai Kan Leung
  • Patent number: 9967194
    Abstract: The objective of the invention is to enable sharing, between layers in a network in which the layers are used to perform communications, resource information and information required for using paths. A network control system includes: a lower layer information storage unit, a lower layer control information conversion unit, an upper layer information storage unit, an upper layer control information conversion unit, an integrated layer information storage unit and a layer integration unit. The layer integration unit integrates, as virtual links, the information of flows, which are representative of communications among terminals in the lower layer, with the network information of the upper layer, thereby constituting the network information of the integrated layer.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: May 8, 2018
    Assignee: NEC CORPORATION
    Inventors: Masaharu Morimoto, Kazuya Suzuki, Yohei Iizawa
  • Patent number: 9954719
    Abstract: Embodiments relate to a data transmission method. A relay node receives information that is about an SCMA codebook used by the relay node and that is sent by a destination node. The relay node receives two or more source signals sent by two or more source nodes. The relay node performs network coding on the received two or more source signals. The relay node performs SCMA codebook mapping on a signal obtained after the network coding, so as to obtain at least two modulation symbols. The relay node sends to the destination node, the at least two modulation symbols obtained after the SCMA mapping.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: April 24, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Lu, Dai Shi, Wenting Guo
  • Patent number: 9948452
    Abstract: A method and system are provided for converting an enhanced Long Range Navigational (eLORAN) signal to a Precision Time Protocol (PTP) signal. Network devices can be located within buildings and not have access to a GPS signal directly from a GPS satellite. Network devices may also be located in a line of sight of a GPS satellite but may lose the GPS signal. An adapter is provided that takes an eLORAN signal, when a GPS signal is lost or not available, and converts the signal into a PTP and other signals to act as timing, synchronization, and syntonization inputs into the network devices. In some cases, the network devices can have a PTP client to receive the PTP signal, one pulse per second signal, and a ten (10) megahertz frequency signal. In other cases, the network devices do not have a PTP client, but can receive a time of day message, one pulse per second signal, and the 10 megahertz frequency signal.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: April 17, 2018
    Assignee: Sprint Communications Company, L.P.
    Inventors: Timothy Hugh Pearson, James W. Norris, Steven Kenneth Guthrie
  • Patent number: 9948371
    Abstract: A method implemented in a network element (NE), comprising obtaining, via a processor of the NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups, performing, via the processor, crosstalk pre-coding on the plurality of encoded signals jointly after performing the MIMO pre-coding to produce a plurality of output signals, and transmitting, via transmitters of the NE, synchronously the plurality of output signals to a plurality of remote NEs via the plurality of DS channels.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: April 17, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Amir H. Fazlollahi, Xiang Wang
  • Patent number: 9948347
    Abstract: A method of calibrating a transceiver circuit including transmission circuitry for processing an input signal to produce an output signal including the input signal modulated onto a carrier signal, and reception circuitry arranged to take a modulated signal including a signal modulated onto a carrier signal and to output the signal demodulated from the carrier signal. The method includes: selectively coupling the transmission circuitry to the reception circuitry; introducing a reference signal into the transmission circuitry, the reference signal causing a plurality of components of different frequencies to be present in a calibration signal in the reception circuitry; measuring the power, and typically the received signal strength indication (RSSI) of the calibration signal including the plurality of components; and adjusting operation of the transmission and reception circuitry to increase the amplitude of a first set of the components relative to the amplitude of a second set of the components.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: April 17, 2018
    Assignee: LIME MICROSYSTEMS LTD.
    Inventor: Srdjan Milenkovic
  • Patent number: 9917720
    Abstract: A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to perform demodulation on the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frequency de-interleaver to frequency de-interleave the demodulated broadcast signals by using a different interleaving sequence, wherein the different interleaving sequence is used for data corresponding to an OFDM symbol pair or data corresponding to an OFDM symbol according to an FFT size of the demodulation, a frame parser to parse at least one signal frame from the frequency de-interleaved broadcast signals and a decoder to decode service data in the parsed at least one signal frame.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: March 13, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Woosuk Ko, Sungryong Hong
  • Patent number: 9910454
    Abstract: Data payload is passed over a boundary from a sender module (SM) on one side of the boundary to a receiver module (RM) on the other side of the boundary. The SM has two or more multiplexers to pass the data payload over to a receiver storage register in the RM. Each multiplexer has 1) its own read address pointer lane coming from sequencing logic located on the RM side and 2) data slots to send data payload from that multiplexer across the boundary to the receiver storage register in the RM in a qualified event synchronization. The sequencing logic ensures that the multiple read address pointers going to the multiplexers have a fixed alternating relationship amongst themselves; and thus, the multiple read address pointers syncopate between each other to move the data payload across the boundary to provide 100% throughput.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: March 6, 2018
    Assignee: Sonics, Inc.
    Inventors: William John Bainbridge, Stephen W. Hamilton, Neal T. Wingen
  • Patent number: 9876667
    Abstract: A four-level pulse amplitude modulation transmitter and corresponding method are provided. The transmitter includes a most significant bit processing section and a least significant bit processing section. The transmitter further includes at least one termination resistor connected to respective outputs of the processing sections to provide a transmitter output. Each of the processing sections include a set of retiming latches arranged in a parallel for aligning input parallel data and providing parallel aligned latched outputs responsive to one phase of a quarter-rate four-phase quadrature clock. Each of the processing sections further includes a serializer for serializing the parallel aligned latched outputs to provide a serialized output using quarter-rates of the quarter-rate four-phase quadrature clock. Each of the processing sections also include an output driver for driving the serialized output.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: January 23, 2018
    Assignee: International Business Machines Corporation
    Inventors: Timothy O. Dickson, Bongjin Kim