Patents by Inventor Katsuaki Abe

Katsuaki Abe 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).

  • Patent number: 10305628
    Abstract: A transmission frame generating device generates a transmission frame. The generating device includes a control information signal generator which generates a modulation method control signal indicating a modulation method used for a data signal and an error correction method control signal indicating an error correction method used for the data signal and a frame former which forms the transmission frame by arranging a training signal, the data signal, the modulation method control signal and the error correction method control signal on a plurality of subcarriers on a frequency axis. The modulation method control signal being repeatedly and discretely arranged on a first multiple of the plurality of subcarriers on the frequency axis and the error correction method control signal being repeatedly and discretely arranged on a second multiple of the plurality of the subcarriers on the frequency axis.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: May 28, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Katsuaki Abe, Masayuki Orihashi, Akihiko Matsuoka
  • Publication number: 20170171013
    Abstract: A radio communication apparatus includes a QPSK modulator that modulates transmission data to produce a QPSK modulation signal and a 64QAM modulator that modulates transmission data to produce a 64QAM modulation signal. A radio transmitter receives the QPSK modulation signal and the 64QAM modulation signal and outputs a transmission signal. An average transmission power of the QPSK modulation signal and the 64QAM modulation signal are within a predetermined output power range.
    Type: Application
    Filed: February 14, 2017
    Publication date: June 15, 2017
    Inventors: Yutaka MURAKAMI, Shinichiro TAKABAYASHI, Katsuaki ABE, Masayuki ORIHASHI, Akihiko MATSUOKA
  • Patent number: 9590834
    Abstract: A transmitting apparatus, includes a signal generator that generates a modulation signal by modulating transmission data using one of a plurality of modulation schemes, a first modulation scheme having a higher m-ary modulation value than other modulation schemes and a pilot signal generator generates a pilot signal. An orthogonal frequency division multiplexing (OFDM) signal generator generates an OFDM signal by selecting the modulation signal and the pilot signal according to the frame timing signal. The OFDM signal is converted to a radio signal, is amplified and is transmitted to an antenna. The pilot signal is inserted in the OFDM signal per a predetermined OFDM symbol and per a predetermined subcarrier and has a lower amplitude than a maximum amplitude of the first modulation scheme in an in-phase-quadrature (IQ) plane.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: March 7, 2017
    Assignee: Wi-Fi One, LLC
    Inventors: Yutaka Murakami, Shinichiro Takabayashi, Katsuaki Abe, Masayuki Orihashi, Akihiko Matsuoka
  • Publication number: 20170005752
    Abstract: A transmission frame generating device generates a transmission frame. The generating device includes a control information signal generator which generates a modulation method control signal indicating a modulation method used for a data signal and an error correction method control signal indicating an error correction method used for the data signal and a frame former which forms the transmission frame by arranging a training signal, the data signal, the modulation method control signal and the error correction method control signal on a plurality of subcarriers on a frequency axis. The modulation method control signal being repeatedly and discretely arranged on a first multiple of the plurality of subcarriers on the frequency axis and the error correction method control signal being repeatedly and discretely arranged on a second multiple of the plurality of the subcarriers on the frequency axis.
    Type: Application
    Filed: September 15, 2016
    Publication date: January 5, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka MURAKAMI, Katsuaki ABE, Masayuki ORIHASHI, Akihiko MATSUOKA
  • Patent number: 9473268
    Abstract: A transmission frame generating device includes a control information signal generator and a frame former. The control information signal generator generates a modulation method information signal indicating a modulation method of a data signal and an error correction method information signal indicating an error correction method of the data signal. The frame former forms the transmission frame by repeating and discretely arranging the same modulation method information signal on a first multiple of a plurality of subcarriers on a frequency axis and by repeating and discretely arranging the same error correction method information signal on a second multiple of the plurality of the subcarriers on the frequency axis.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: October 18, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Katsuaki Abe, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 9026877
    Abstract: In a communication system in which propagation path error tolerance is improved by switching the modulation method or error correction method adaptively according to the state of the propagation path, signals MX, MY, CX, and CY indicating the modulation method and error correction method used by the transmitting side are transmitted arranged at discrete locations within the same frame. By this means, the possibility of discretely arranged signals MX and MY, or CX and CY, both degrading is made low even if the transmit signal experiences fading or propagation path fluctuations. As a result, it is possible for the modulation method information signal and/or error correction method information signal to be restored correctly on the receiving side.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: May 5, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Katsuaki Abe, Masayuki Orihashi, Akihiko Matsuoka
  • Publication number: 20150058703
    Abstract: A transmission frame generating device includes a control information signal generator and a frame former. The control information signal generator generates a modulation method information signal indicating a modulation method of a data signal and an error correction method information signal indicating an error correction method of the data signal. The frame former forms the transmission frame by repeating and discretely arranging the same modulation method information signal on a first multiple of a plurality of subcarriers on a frequency axis and by repeating and discretely arranging the same error correction method information signal on a second multiple of the plurality of the subcarriers on the frequency axis.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 26, 2015
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka MURAKAMI, Katsuaki ABE, Masayuki ORIHASHI, Akihiko MATSUOKA
  • Patent number: 8934575
    Abstract: Variation in received signal qualities at positions in a frame is estimated so as to improve a communication quality. In communication from a transmitting station to a receiving station, a received signal quality is estimated per data position in a data frame received by the receiving station, thus to grasp situations of the received signal quality varied depending on a position which is caused by various factors of property deterioration in a process from transmitting communication data from the transmitting station to receiving it by the receiving station via a transmission path. Further, an estimating result is supplied to a data processing unit and used at a latter stage. The estimating result is notified to the transmitting station and arrangement of transmitting data is reconstructed on the transmitting station side. The arrangement of the transmitting data is properly changed in accordance with importance of the communication data.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: January 13, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Katsuaki Abe, Masayuki Orihasi, Yutaka Murakami, Akihiko Matsuoka, Takenori Sakamoto
  • Patent number: 8711917
    Abstract: A sampling filter device wherein the filter characteristic is variable without using a control signal of a complicated waveform is provided. A sampling filter device 105 has integration capacitors 130 and 131, an integration time adjustment section 180, and a plurality of switches 100, 101, 110, and 111. Input current is integrated in different time duration with one clock and is stored in the integration capacitors 130 and 131 and charges stored in the integration capacitor from several clocks before to one clock before are added and the result is output. When charge is stored in the integration capacitors 130 and 131 with each clock, the integration time duration is changed, whereby it is made possible to weight and add output charge and the filter characteristic changes.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: April 29, 2014
    Assignee: Panasonic Corporation
    Inventors: Satoshi Tsukamoto, Noriaki Saito, Katsuaki Abe, Kentaro Miyano, Yoshifumi Hosokawa, Yasuyuki Naito
  • Patent number: 8655297
    Abstract: Disclosed are a nonlinear distortion compensating receiver and nonlinear distortion compensation method, wherein nonlinear distortion is reduced with a simple circuit configuration. A correction (opposite characteristics) filter (104) has characteristics opposite that of the frequency characteristics of a direct sampling mixer (102) and corrects signals sampled by the direct sampling mixer (102). In the main path, a LPF (106) extracts a frequency band component of a desired signal from the corrected signal. In the replica path, a BPF (107) extracts the frequency band component of a blocker signal from the corrected signal. A cubing circuit (108) uses the frequency band component of the blocker signal to generate a replica signal for the nonlinear distortion. An adaptive filter (110) performs filter processing on the replica signal while updating the filter coefficients.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Satoshi Tsukamoto, Noriaki Saito, Yoshito Shimizu, Tadashi Morita, Katsuaki Abe
  • Publication number: 20130315343
    Abstract: In a communication system in which propagation path error tolerance is improved by switching the modulation method or error correction method adaptively according to the state of the propagation path, signals MX, MY, CX, and CY indicating the modulation method and error correction method used by the transmitting side are transmitted arranged at discrete locations within the same frame. By this means, the possibility of discretely arranged signals MX and MY, or CX and CY, both degrading is made low even if the transmit signal experiences fading or propagation path fluctuations. As a result, it is possible for the modulation method information signal and/or error correction method information signal to be restored correctly on the receiving side.
    Type: Application
    Filed: August 2, 2013
    Publication date: November 28, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Yutaka MURAKAMI, Katsuaki ABE, Masayuki ORIHASHI, Akihiko MATSUOKA
  • Patent number: 8527827
    Abstract: An orthogonal frequency division multiplexing transmission method includes generating a data symbol. A control information signal is generated. The control information signal relates to a modulation scheme and an error correction scheme of a data symbol in a frame. An orthogonal frequency division multiplexing signal is formed. The orthogonal frequency division multiplexing signal includes the data symbol and the control information signal. The orthogonal frequency division multiplexing signal is formed by arranging the control information signal in a first symbol group that is formed with subcarriers in a time period, and in a second symbol group that is formed with subcarriers, located in the time period, and that has a frequency band distant from the first symbol group.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: September 3, 2013
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Katsuaki Abe, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8504101
    Abstract: A multimode wireless communication apparatus that supports plural wireless communication systems and switches wireless communication systems to communicate. The apparatus includes a signal processor capable of switching wireless communication systems by plural manners; and a controller that directs to the signal processor a combination of manners of switching wireless communication systems according to a communication environment. The signal processor switches wireless communication systems according to the combination of manners of switching wireless communication systems directed from the controller.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: August 6, 2013
    Assignee: Panasonic Corporation
    Inventors: Tomoya Urushihara, Akihiko Matsuoka, Katsuaki Abe, Kentaro Miyano, Takenori Sakamoto
  • Patent number: 8451793
    Abstract: A wireless terminal involving small redundancy that can be reconfigured to a configuration compatible with a plurality of systems using the hardware resources compatible with one system is provided. A wireless terminal 100A is compatible with an OFCDM system and has a signal processing section 151, a synchronous detection section 162, etc. The signal processing section 151 performs Fourier transform when the wireless terminal is compatible with the OFCDM system; the signal processing section 151 performs Fourier transform and inverse Fourier transform compatible with an OFDM system when the wireless terminal is compatible with the OFDM system and a CDMA system. When the wireless terminal is compatible with the OFCDM system, the synchronous detection section 162 uses taps used in the systems when the wireless terminal is compatible with the OFDM system and the CDMA system.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: May 28, 2013
    Assignee: Panasonic Corporation
    Inventors: Kentaro Miyano, Katsuaki Abe, Akihiko Matsuoka
  • Patent number: 8385874
    Abstract: Provided are a direct sampling circuit and a receiver using a discrete time analog process and having a filter effect of a steep attenuation characteristic in a narrow-pass band without lowering a sampling rate. In a discrete time direct sampling circuit (13), the positive phase side and the inverse phase side are both sampled by a local signal for a differential current output of a differential voltage/current conversion unit (1011) and electric charge is accumulated in a charge sampling capacitor. The latest accumulated charge at the positive phase side and charge accumulated at the inverse phase side before a predetermined number of samples are combined with the charge accumulated in a history capacitor (1043) in the past. Thus, it is possible to realize equivalently high-degree FIR filter characteristic.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: February 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Katsuaki Abe, Yoshifumi Hosokawa, Yasuyuki Naito, Kentaro Miyano, Noriaki Saito
  • Patent number: 8380781
    Abstract: There are provided a sampling filter that enables a filter characteristic to be adjusted flexibly, and a radio communication apparatus equipped with this sampling filter. A sampling filter apparatus (100) is equipped with four integration units (150-1 through 150-4) corresponding to the number of filter taps, and some of the integration units (150-1 through 150-4) include an integrator having an MEMS structure. By this means, a charge amount (accumulated charge amount) of a received signal integrated by an integrator can be adjusted by adjusting the capacity of an integrator having an MEMS structure. A received signal amount emitted from an integration unit can also be adjusted by adjustment of the integration amount of a received signal, enabling the filter characteristic of the sampling filter apparatus (100) to be adjusted flexibly.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: February 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Kentaro Miyano, Yoshifumi Hosokawa, Yasuyuki Naito, Katsuaki Abe, Noriaki Saito
  • Patent number: 8356063
    Abstract: A digital filter is provided for radio communication processing capable of dynamically modifying the characteristic and simultaneously processing a plurality of systems. In the digital filter, calculation core groups capable of modifying function are arranged and connected to one another by an input interface unit and an output interface unit. When the communication mode is modified, the number of calculation resources to be used and setting contents are decided according to the setting candidate of the filter characteristic required and the calculation resource empty state.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: January 15, 2013
    Assignee: Panasonic Corporation
    Inventors: Katsuaki Abe, Kentaro Miyano, Akihiko Matsuoka, Tomoya Urushihara
  • Patent number: RE45368
    Abstract: A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: February 10, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Masayuki Orihashi, Yutaka Murakami, Katsuaki Abe, Akihiko Matsuoka
  • Patent number: RE47356
    Abstract: A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: April 16, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Masayuki Orihashi, Yutaka Murakami, Katsuaki Abe, Akihiko Matsuoka
  • Patent number: RE49244
    Abstract: A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: October 11, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Masayuki Orihashi, Yutaka Murakami, Katsuaki Abe, Akihiko Matsuoka