Patents by Inventor Daini Okajima

Daini Okajima 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).

  • Radio receiver using level-variable reference signal for discriminative detection of data signal and signal discrimination method
    Patent number: 6343095
    Abstract: A radio receiver apparatus for receiving a spread spectrum signal in which a signal derived through a level detection of a signal demodulated by a correlative demodulator and a signal obtained by extracting a signal component of a synchronous frequency from a reception synchronizing clock are combined to thereby generate a reference signal having a level which changes in accordance with change of the detected signal, and by comparing the detected signal with the reference signal, the received signal is discriminated.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: January 29, 2002
    Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.
    Inventors: Minoru Moteki, Daini Okajima, Kazuhide Tamizu, Kenji Tamaru
  • Radio receiver using level-variable reference, signal for discriminative detection of data signal and signal discrimination method
    Patent number: 6094451
    Abstract: A radio receiver apparatus for receiving a spread spectrum signal in which a signal derived through a level detection of a signal demodulated by a correlative demodulator and a signal obtained by extracting a signal component of a synchronous frequency from a reception synchronizing clock are combined to thereby generate a reference signal having a level which changes in accordance with change of the detected signal, and by comparing the detected signal with the reference signal, the received signal is discriminated.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: July 25, 2000
    Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.
    Inventors: Minoru Moteki, Daini Okajima, Kazuhide Tamizu, Kenji Tamaru