Patents by Inventor Hideaki Ugawa

Hideaki Ugawa 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).

  • Transmitter, receiver, communication system, and communication method employing spread spectrum communication technique
    Patent number: 5859875
    Abstract: Transmission mode selection is enabled, so communication reliability, transmission speed, and equipment utilization efficiency are all high. A first transmission system whereby spectrum spreading is accomplished with a spread code 1 and data is transmitted, and a second transmission system whereby data is transmitted with a spread code 2, are provided. In high-reliability transmission mode, identical data from a data buffer is transmitted through both the first and second transmission systems to achieve space diversity. In high-speed mode, data divided by a data division circuit is transmitted simultaneously through the first and second transmission systems, making possible efficient data transfer. Control information insertion circuits append transmission mode data to the transmitted data.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: January 12, 1999
    Assignee: Uniden Corporation
    Inventors: Hideki Kato, Shinichi Yamazaki, Hideaki Ugawa, Kazuhiko Seki