Patents by Inventor Cuichai Ji

Cuichai Ji 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).

  • Novas hybrid positioning technology using terrestrial digital broadcasting signal (DBS) and global positioning system (GPS) satellite signal
    Patent number: 8004460
    Abstract: A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal. The method includes detecting a presence status of the GPS signal through a signal detector in a receiver, detecting a presence status of the DBS signal through the signal detector, determining the signal strength of the GPS signal if the GPS signal is detected, determining the signal strength of the DBS signal if the DBS signal is detected, choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal, and determining a location of the receiver based on the chosen positioning mode. The plurality of positioning modes includes standalone GPS mode, assisted GPS (AGPS) mode, assisted GPS positioning with DBS assist mode, DBS positioning with GPS assist mode, standalone DBS mode, and assist DBS mode.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: August 23, 2011
    Assignee: O2Micro International, Ltd.
    Inventors: You-Yuh Jack Shyr, Mingqiang Cheng, Cuichai Ji
  • NOVAS HYBRID POSITIONING TECHNOLOGY USING TERRESTRIAL DIGITAL BROADCASTING SIGNAL (DBS) AND GLOBAL POSITIONING SYSTEM (GPS) SATELLITE SIGNAL
    Publication number: 20100171660
    Abstract: A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal. The method includes detecting a presence status of the GPS signal through a signal detector in a receiver, detecting a presence status of the DBS signal through the signal detector, determining the signal strength of the GPS signal if the GPS signal is detected, determining the signal strength of the DBS signal if the DBS signal is detected, choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal, and determining a location of the receiver based on the chosen positioning mode. The plurality of positioning modes includes standalone GPS mode, assisted GPS (AGPS) mode, assisted GPS positioning with DBS assist mode, DBS positioning with GPS assist mode, standalone DBS mode, and assist DBS mode.
    Type: Application
    Filed: March 18, 2010
    Publication date: July 8, 2010
    Applicant: O2MICRO, INC.
    Inventors: You-Yuh Jack SHYR, MINGQIANG CHENG, CUICHAI JI
  • Novas hybrid positioning technology using terrestrial digital broadcasting signal (DBS) and global positioning system (GPS) satellite signal
    Patent number: 7701388
    Abstract: A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal. The method includes detecting a presence status of the GPS signal through a signal detector in a receiver, detecting a presence status of the DBS signal through the signal detector, determining the signal strength of the GPS signal if the GPS signal is detected, determining the signal strength of the DBS signal if the DBS signal is detected, choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal, and determining a location of the receiver based on the chosen positioning mode. The plurality of positioning modes includes stand-alone GPS mode, assisted GPS (AGPS) mode, assisted GPS positioning with DBS assist mode, DBS positioning with GPS assist mode, stand-alone DBS mode, and assist DBS mode.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: April 20, 2010
    Assignee: O2Micro International Ltd.
    Inventors: You-Yuh Jack Shyr, Mingqiang Cheng, Cuichai Ji
  • Novas hybrid positioning technology using terrestrial digital broadcasting signal (DBS) and global positioning system (GPS) satellite signal
    Publication number: 20070109184
    Abstract: A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal. The method includes detecting a presence status of the GPS signal through a signal detector in a receiver, detecting a presence status of the DBS signal through the signal detector, determining the signal strength of the GPS signal if the GPS signal is detected, determining the signal strength of the DBS signal if the DBS signal is detected, choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal, and determining a location of the receiver based on the chosen positioning mode. The plurality of positioning modes includes stand-alone GPS mode, assisted GPS (AGPS) mode, assisted GPS positioning with DBS assist mode, DBS positioning with GPS assist mode, stand-alone DBS mode, and assist DBS mode.
    Type: Application
    Filed: May 24, 2006
    Publication date: May 17, 2007
    Inventors: You-Yuh Shyr, Mingqiang Cheng, Cuichai Ji