Patents by Inventor Noriaki Kaneda

Noriaki Kaneda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220057190
    Abstract: An apparatus comprising means for: causing illumination of different areas of a sample with an optical frequency imaging beam at different positions at different times, wherein adjacent positions are configured to cause the corresponding areas to at least partially overlap;receiving signals indicative of back-scattering of the optical frequency imaging beam from the sample at the different times; and processing the received signals to obtain an image of the sample, wherein processing the received signals compensates for phase variations between the different positions at the different times using a matched filter derived from a scattering model of the sample.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 24, 2022
    Inventors: Noriaki KANEDA, Michael EGGLESTON
  • Publication number: 20210281501
    Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include selection of a FEC setting (e.g., an amount of puncturing and/or shortening of a FEC code, a FEC code, or the like) for a communication channel from a transmitter to a receiver based on channel characteristic information of the communication channel from the transmitter to the receiver (e.g., transfer function information, channel loss information, noise characteristic information, error information (e.g., bit error rate, error modeling, or the like), or the like). Various example embodiments for supporting FEC in a communication system, based on selection of a FEC setting for a communication channel based on channel characteristic information of the communication channel, may be applied within various types of communication systems, including various types of wired and/or wireless communication systems.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 9, 2021
    Inventors: Amitkumar Mahadevan, Doutje Van Veen, Noriaki Kaneda, Vincent Houtsma, Paul Cautereels, Carl Mertens, Michael Fivez
  • Patent number: 10894009
    Abstract: The present invention aims to provide a cyclosporine external preparation showing improved transdermal absorbability of cyclosporine. The present invention provides an external preparation containing cyclosporine and a ketone.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: January 19, 2021
    Assignee: MARUHO CO., LTD.
    Inventors: Hiroki Sakiyama, Noriaki Kaneda, Tomomi Shigeno
  • Patent number: 10594406
    Abstract: Pilot-aided digital coherent reception of high-order QAM signal detection using a continuous short pilot preamble and subsequent pilot symbols that are periodically distributed with payload data resulting in low-complexity and fast-convergence signal detection for continuous mode coherent reception of high-order QAM signals. A digital signal processor is configured to demodulate a transmitted data stream from digital stream of measurements of light mixtures produced in a receiver for coherent optical communications in response to receiving modulated optical carriers. The digital signal processor includes one circuit stage for providing corrections to the digital stream to compensate first effects on the light mixtures due to a frequency shift of a local optical oscillator of the receiver and another circuit stage for correcting the digital stream to compensate for second effects on the light mixtures due to polarization dependent channel modification of the modulated optical carriers.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 17, 2020
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Chen Zhu, Noriaki Kaneda
  • Patent number: 10505641
    Abstract: A coherent optical receiver in which the channel equalizer and the clock-recovery circuit are connected in a nested-loop configuration, wherein the channel estimate generated by the equalizer is used to adjust the phase of the clock signal generated by the clock-recovery circuit. The channel equalizer can be implemented using a bank of time-domain or frequency-domain FIR filters. In an example embodiment, the clock-recovery circuit is configured to track the phase rotation corresponding to the equalized signals in a frequency-dependent manner; track the phase rotation in the channel equalizer either in a frequency-dependent manner or based on the mean signal delay therein; and adjust the phase of the clock signal based on an effective difference between these two phase rotations. The clock-recovery circuit enhances the clock tone by applying a Fourier transform to the squared absolute values of the equalized signals outputted by the channel equalizer.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: December 10, 2019
    Assignee: Nokia Solutions and Networks OY
    Inventors: Noriaki Kaneda, Stephan Weisser, Carlo Costantini
  • Publication number: 20190334627
    Abstract: A coherent optical receiver in which the channel equalizer and the clock-recovery circuit are connected in a nested-loop configuration, wherein the channel estimate generated by the equalizer is used to adjust the phase of the clock signal generated by the clock-recovery circuit. The channel equalizer can be implemented using a bank of time-domain or frequency-domain FIR filters. In an example embodiment, the clock-recovery circuit is configured to track the phase rotation corresponding to the equalized signals in a frequency-dependent manner; track the phase rotation in the channel equalizer either in a frequency-dependent manner or based on the mean signal delay therein; and adjust the phase of the clock signal based on an effective difference between these two phase rotations. The clock-recovery circuit enhances the clock tone by applying a Fourier transform to the squared absolute values of the equalized signals outputted by the channel equalizer.
    Type: Application
    Filed: April 30, 2018
    Publication date: October 31, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Noriaki Kaneda, Stephan Weisser, Carlo Costantini
  • Publication number: 20190280778
    Abstract: Pilot-aided digital coherent reception of high-order QAM signal detection using a continuous short pilot preamble and subsequent pilot symbols that are periodically distributed with payload data resulting in low-complexity and fast-convergence signal detection for continuous mode coherent reception of high-order QAM signals. A digital signal processor is configured to demodulate a transmitted data stream from digital stream of measurements of light mixtures produced in a receiver for coherent optical communications in response to receiving modulated optical carriers. The digital signal processor includes one circuit stage for providing corrections to the digital stream to compensate first effects on the light mixtures due to a frequency shift of a local optical oscillator of the receiver and another circuit stage for correcting the digital stream to compensate for second effects on the light mixtures due to polarization dependent channel modification of the modulated optical carriers.
    Type: Application
    Filed: March 9, 2018
    Publication date: September 12, 2019
    Applicant: Nokia Solutions and Networks Oy
    Inventors: Chen Zhu, Noriaki Kaneda
  • Patent number: 10330778
    Abstract: We disclose a lidar system that includes a modulator-based probe-light generator and a coherent optical receiver. The probe-light generator uses tunable carrier-suppressed single-sideband modulation to generate frequency-chirped optical pulses for the optical-probe beam directed at the target. The coherent optical receiver uses a homodyne detection scheme in which a split portion of the optical-probe beam is used as an optical local oscillator signal for detecting a corresponding optical beam reflected by the target. The resulting electrical RF signals generated by the receiver can be processed, e.g., using a disclosed signal-processing method, to determine one or both of the distance to the target and the velocity of the target.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: June 25, 2019
    Assignee: NOKIA OF AMERICA CORPORATION
    Inventor: Noriaki Kaneda
  • Patent number: 10284303
    Abstract: An apparatus includes an electronic digital signal processor having electrical inputs for receiving a first sequence of measurements of values of a transmitted modulated optical carrier received in a coherent optical receiver and having electrical outputs for a stream of determined transmitted data values demodulated therein from the first sequence. The electronic digital signal processor has first circuitry to determine phase offsets of received pilot values from the first sequence. Additionally, the electronic digital signal processor has second circuitry to correct phase offsets of received ones of the data values from the determined phases of pilot values and data values being temporally interleaved in the transmitted modulated optical carrier. A system and a method are also included.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: May 7, 2019
    Assignee: Nokia of America Corporation
    Inventors: Chen Zhu, Noriaki Kaneda, Young-Kai Chen
  • Publication number: 20190074908
    Abstract: A coherent optical receiver having an analog electrical circuit connected to combine the outputs of multiple photodetectors to generate an electrical output signal from which the data encoded in a received modulated optical signal can be recovered in a robust and straightforward manner. In an example embodiment, the analog electrical circuit includes one or more transimpedance amplifiers connected between the photodetectors and the receiver's output port. The coherent optical receiver may include a dual-polarization optical hybrid coupled to eight photodiodes to enable polarization-insensitive detection of the received modulated optical signal. The signal processing implemented in the analog electrical circuit advantageously enables the use of relatively inexpensive local-oscillator sources that may have relaxed specifications with respect to linewidth and wavelength stability.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 7, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Sian Chong Lee, Vincent Houtsma, Doutje van Veen, Chen Zhu, Noriaki Kaneda, Michael Eggleston
  • Publication number: 20180269985
    Abstract: An apparatus includes an electronic digital signal processor having electrical inputs for receiving a first sequence of measurements of values of a transmitted modulated optical carrier received in a coherent optical receiver and having electrical outputs for a stream of determined transmitted data values demodulated therein from the first sequence. The electronic digital signal processor has first circuitry to determine phase offsets of received pilot values from the first sequence. Additionally, the electronic digital signal processor has second circuitry to correct phase offsets of received ones of the data values from the determined phases of pilot values and data values being temporally interleaved in the transmitted modulated optical carrier. A system and a method are also included.
    Type: Application
    Filed: June 2, 2017
    Publication date: September 20, 2018
    Inventors: Chen Zhu, Noriaki Kaneda, Young-Kai Chen
  • Publication number: 20180191448
    Abstract: An apparatus includes an optical receiver that includes a processor. The receiver is configured to direct a digital-electrical representation of a received symbol value of a pulse-amplitude modulated signal to a frequency-domain processing path of the processor and to a time-domain processing path of the processor. The processor is configured to compute, in the frequency-domain processing path, a first product of the received symbol value and a first coefficient, and to compute a second product of the received symbol value and a second coefficient. The processor is further configured to compute, in the time-domain processing path, an estimated error metric based on the first and second products, and to determine an updated first coefficient and an updated second coefficient based on said error metric. The processor is further configured to equalize a subsequent received symbol using the updated coefficients.
    Type: Application
    Filed: September 28, 2017
    Publication date: July 5, 2018
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Noriaki Kaneda, Sian Chong J. Lee
  • Publication number: 20180177879
    Abstract: The present invention is intended to provide a cyclosporine external preparation that improves transdermal absorption of cyclosporine. The present invention provides an external preparation containing cyclosporine, ethanol, and a fatty acid monoester.
    Type: Application
    Filed: June 1, 2016
    Publication date: June 28, 2018
    Applicant: MARUHO CO., LTD
    Inventors: Hiroki SAKIYAMA, Noriaki KANEDA
  • Patent number: 9871613
    Abstract: We disclose an optical add-drop multiplexer that can apply different routing operations to different subcarriers of a data frame. In an example embodiment, the digital signal processor (DSP) of the optical add-drop multiplexer carries out subcarrier-specific add, drop, and pass-through operations in the electrical frequency domain, which enables the DSP to only partially unwrap the pass-through subcarriers, thereby at least partially avoiding some of the more processing-power-hungry DSP operations and reducing the sub-wavelength routing latency accordingly. Also disclosed is an example data-frame structure that can be used to provide subcarrier-specific routing instructions to the optical add-drop multiplexer.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: January 16, 2018
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Noriaki Kaneda, Sian Chong J. Lee
  • Patent number: 9847841
    Abstract: A coherent optical receiver that is capable of obtaining separate estimates of the I/Q phase imbalances caused by the front-end circuits of the receiver and transmitter. In an example embodiment, the receiver's I/Q imbalance is estimated using equalization coefficients of a first digital equalizer located upstream from the carrier-recovery module in the train of digital-signal processing implemented at the receiver, whereas the transmitter's I/Q imbalance is estimated using equalization coefficients of a second digital equalizer located downstream from the carrier-recovery module. The receiver DSP can then use the first estimate to carry out signal processing that reduces adverse effects of the receiver's I/Q imbalance on data recovery at the receiver. The receiver can also provide the estimate of the transmitter's I/Q phase imbalance to the transmitter, which can then perform digital signal pre-distortion directed at compensating that I/Q imbalance at the transmitter.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 19, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Noriaki Kaneda
  • Publication number: 20170350964
    Abstract: We disclose a lidar system that includes a modulator-based probe-light generator and a coherent optical receiver. The probe-light generator uses tunable carrier-suppressed single-sideband modulation to generate frequency-chirped optical pulses for the optical-probe beam directed at the target. The coherent optical receiver uses a homodyne detection scheme in which a split portion of the optical-probe beam is used as an optical local oscillator signal for detecting a corresponding optical beam reflected by the target. The resulting electrical RF signals generated by the receiver can be processed, e.g., using a disclosed signal-processing method, to determine one or both of the distance to the target and the velocity of the target.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 7, 2017
    Inventor: Noriaki Kaneda
  • Publication number: 20170272195
    Abstract: We disclose an optical add-drop multiplexer that can apply different routing operations to different subcarriers of a data frame. In an example embodiment, the digital signal processor (DSP) of the optical add-drop multiplexer carries out subcarrier-specific add, drop, and pass-through operations in the electrical frequency domain, which enables the DSP to only partially unwrap the pass-through subcarriers, thereby at least partially avoiding some of the more processing-power-hungry DSP operations and reducing the sub-wavelength routing latency accordingly. Also disclosed is an example data-frame structure that can be used to provide subcarrier-specific routing instructions to the optical add-drop multiplexer.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 21, 2017
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Noriaki Kaneda, Sian Chong J. Lee
  • Patent number: 9768883
    Abstract: An optical receiver includes an equalizer to generate a plurality of equalization coefficients corresponding to a plurality of frequencies of an optical signal received by the optical receiver. The equalizer zeroes out a first subset of the equalization coefficients corresponding to a first subset of the plurality of frequency components and applies a second subset of non-zero equalization coefficients to the first signal. The optical receiver may also include a chromatic dispersion compensator to generate inverse chromatic dispersion coefficients corresponding to the plurality of frequency components, and to zero out a first subset of the inverse chromatic dispersion coefficients corresponding to the first subset of the plurality of frequency components and further to apply a second subset of non-zero inverse chromatic dispersion coefficients to a second optical signal.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: September 19, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Noriaki Kaneda, Timo Pfau, Jeffrey Lee
  • Patent number: 9762379
    Abstract: We disclose an optical receiver for direct detection of an intensity-modulated optical signal, the digital signal processor of which employs a clock-recovery circuit capable of reliably recovering the internal clock of the received optical signal without relying on dispersion-compensation processing even if the signal's eye pattern is substantially closed. In an example embodiment, the clock-recovery circuit comprises a frequency-domain phase detector that operates to determine and track in time the sampling phase using only a subset of the digital spectral components corresponding to the received optical signal. The determined sampling phase is then used to synchronize the digital electrical samples of the received optical signal with the internal clock thereof by way of digital interpolation or through appropriate control of the sampling frequency and phase of the receiver's analog-to-digital converter.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: September 12, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Noriaki Kaneda
  • Publication number: 20170230167
    Abstract: We disclose an optical receiver for direct detection of an intensity-modulated optical signal, the digital signal processor of which employs a clock-recovery circuit capable of reliably recovering the internal clock of the received optical signal without relying on dispersion-compensation processing even if the signal's eye pattern is substantially closed. In an example embodiment, the clock-recovery circuit comprises a frequency-domain phase detector that operates to determine and track in time the sampling phase using only a subset of the digital spectral components corresponding to the received optical signal. The determined sampling phase is then used to synchronize the digital electrical samples of the received optical signal with the internal clock thereof by way of digital interpolation or through appropriate control of the sampling frequency and phase of the receiver's analog-to-digital converter.
    Type: Application
    Filed: February 8, 2016
    Publication date: August 10, 2017
    Applicant: Alcatel-Lucent USA Inc.
    Inventor: Noriaki Kaneda