Patents by Inventor Toshiyuki Ougi

Toshiyuki Ougi 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).

  • Modem apparatus, communication apparatus and communication control method
    Patent number: 6987801
    Abstract: The present invention calculates a difference between present sampling data and sampling data one data unit ahead, cumulatively adds up difference values calculated for every sampling by going back to the time point ahead by the number of samples of a cyclic prefix signal inserted into an initializing signal and confirms the position of the cyclic prefix signal from the sample number for which this cumulative value indicates a minimum value.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: January 17, 2006
    Assignee: Panasonic Communications Co., Ltd.
    Inventors: Nobuhiko Noma, Mikio Mizutani, Toshiyuki Ougi
  • Adaptive equalizer training circuit, modem apparatus and communication apparatus
    Patent number: 6928110
    Abstract: A training circuit for training a tap coefficient of an adaptive equalizer that performs error calculations in a training process and updating of the tap coefficient in a time area and thereby makes the tap coefficient converge stably in a short time.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: August 9, 2005
    Assignee: Panasonic Communications Co., Ltd.
    Inventors: Toshiyuki Ougi, Mikio Mizutani, Nobuhiko Noma
  • Modem apparatus, communication apparatus and communication control method
    Patent number: 6922437
    Abstract: The present invention calculates a product of the present sampling data by the sampling data one data unit ahead through a multiplier, adds up product values calculated for every sampling by adding product values calculated from previous samples occurring one data unit in advance through an adder and detects a reference timing with regard to a CP (cycle prefix) signal using the addition value.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 26, 2005
    Assignee: Panasonic Communications Co., Ltd.
    Inventors: Nobuhiko Noma, Mikio Mizutani, Toshiyuki Ougi
  • Adaptive equalizer training circuit, modem apparatus and communication apparatus
    Publication number: 20010048717
    Abstract: A training circuit for training a tap coefficient of an adaptive equalizer that performs error calculations in a training process and updating of the tap coefficient in a time area and thereby makes the tap coefficient converge stably in a short time.
    Type: Application
    Filed: May 22, 2001
    Publication date: December 6, 2001
    Applicant: MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC.
    Inventors: Toshiyuki Ougi, Mikio Mizutani, Nobuhiko Noma
  • Modem apparatus, communication apparatus and communication control method
    Publication number: 20010026484
    Abstract: The present invention calculates a difference between present sampling data and sampling data 1 data unit ahead, cumulatively adds up difference values calculated for every sampling by going back to the time point ahead by the number of samples of a CP signal inserted into an initializing signal and confirms the position of the CP signal from the sample number for which this cumulative value indicates a minimum value.
    Type: Application
    Filed: March 20, 2001
    Publication date: October 4, 2001
    Applicant: MATSUSHITA GRAPHIC COMMUNICATION
    Inventors: Nobuhiko Noma, Mikio Mizutani, Toshiyuki Ougi
  • Modem apparatus, communication apparatus and communication control method
    Publication number: 20010026582
    Abstract: The present invention calculates a product of the present sampling data by the sampling data 1 data unit ahead through multiplier 14, adds up product values calculated for every sampling by going back to the time point 1 data unit ahead through adder 16 and detects a reference timing with regard to a CP signal using the addition value.
    Type: Application
    Filed: March 20, 2001
    Publication date: October 4, 2001
    Applicant: MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC.
    Inventors: Nobuhiko Noma, Mikio Mizutani, Toshiyuki Ougi