Patents by Inventor Naotoshi Maeda

Naotoshi Maeda 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).

  • Reception device and method of determining the velocity of the device based on a received pilot signal
    Patent number: 8687515
    Abstract: A channel characteristic obtained from a pilot signal is stored for a prescribed number of symbols and a Fourier transform is performed (1), the power of each Doppler frequency component is calculated (2), filtering is performed in the time direction for each Doppler frequency component (3), noise components are masked (4), power changes between mutually adjacent Doppler frequency components are emphasized (5), and motion information is generated by comparison with a predetermined decision threshold (6). Velocity detection that detects velocity of motion from a received signal with high precision in order to improve mobile reception performance by optimizing demodulation operations according to velocity of motion thereby becomes possible.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: April 1, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Ido, Naotoshi Maeda
  • RECEPTION DEVICE AND METHOD
    Publication number: 20120170480
    Abstract: A channel characteristic obtained from a pilot signal is stored for a prescribed number of symbols and a Fourier transform is performed (1), the power of each Doppler frequency component is calculated (2), filtering is performed in the time direction for each Doppler frequency component (3), noise components are masked (4), power changes between mutually adjacent Doppler frequency components are emphasized (5), and motion information is generated by comparison with a predetermined decision threshold (6). Velocity detection that detects velocity of motion from a received signal with high precision in order to improve mobile reception performance by optimizing demodulation operations according to velocity of motion thereby becomes possible.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 5, 2012
    Inventors: Jun Ido, Naotoshi Maeda
  • Scan conversion apparatus with improved vertical resolution and flicker reduction apparatus
    Patent number: 5822008
    Abstract: A video scan converter has a deflickering circuit that attenuates spatial frequency components that combine high vertical spatial frequency with low horizontal spatial frequency. The resulting signal is converted from progressive scanning to interlaced scanning by appropriate selection of even and odd horizontal scanning lines. The deflickering circuit may also expand a selected part of the video signal by vertical interpolation, followed by vertical low-pass filtering, in which case a separate horizontal interpolating circuit expands the selected part horizontally, preferably after progressive-to-interlaced scan conversion.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: October 13, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Sadayuki Inoue, Naotoshi Maeda, Junji Sukeno, Hiroshi Onishi