Patents by Inventor Shigeru Kozono

Shigeru Kozono 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).

  • Cochannel interference measurement system
    Patent number: 4561114
    Abstract: In radio communication system using angular modulation, the presence and quantity of cochannel interference is detected. According to the invention, when desired signal and undesired signal are received simultaneously, an envelope of the received IF output signal involves low frequency spectrum component similar to that of fading and high frequency spectrum component with several KHz. The low frequency spectrum component and high frequency spectrum component are then calculated, and the interference ratio D/U is obtained by processing said components.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: December 24, 1985
    Assignee: Nippon Telegraph & Telephone Public Corporation
    Inventors: Shigeru Kozono, Keiichi Ishikawa