Patents by Inventor Masahiro Tsuboshima

Masahiro Tsuboshima 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).

  • Receiver device, transmit/receive terminal, propagation delay time measurement method and computer program
    Patent number: 9231811
    Abstract: A receiver device is provided with: channel estimation unit which obtains channel estimation values for a frequency domain on the basis of pilot symbols disposed in an OFDM subcarrier; interpolation unit which performs interpolation so that the number of samples of channel estimation values obtained by the channel estimation unit is a power of 2; transformation unit which transforms the channel estimation values interpolated by the interpolation unit into a time domain to obtain a delay profile; and power peak position detection unit which detects a power peak position of the delay profile so as to obtain a propagation delay time. The power peak position detection unit references the signal power of the portion interpolated by the interpolation unit in order to detect a suitable power peak position in the delay profile.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: January 5, 2016
    Assignee: NEC CORPORATION
    Inventors: Takashi Mochizuki, Masahiro Tsuboshima
  • RECEIVER DEVICE, TRANSMIT/RECEIVE TERMINAL, PROPAGATION DELAY TIME MEASUREMENT METHOD AND COMPUTER PROGRAM
    Publication number: 20150215149
    Abstract: A receiver device is provided with: channel estimation unit which obtains channel estimation values for a frequency domain on the basis of pilot symbols disposed in an OFDM subcarrier; interpolation unit which performs interpolation so that the number of samples of channel estimation values obtained by the channel estimation unit is a power of 2; transformation unit which transforms the channel estimation values interpolated by the interpolation unit into a time domain to obtain a delay profile; and power peak position detection unit which detects a power peak position of the delay profile so as to obtain a propagation delay time. The power peak position detection unit references the signal power of the portion interpolated by the interpolation unit in order to detect a suitable power peak position in the delay profile.
    Type: Application
    Filed: April 24, 2013
    Publication date: July 30, 2015
    Applicant: NEC Corporation
    Inventors: Takashi Mochizuki, Masahiro Tsuboshima