Patents by Inventor Prabhaker R. Chitrapu

Prabhaker R. Chitrapu 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).

  • Cell search using peak quality factors
    Patent number: 7065064
    Abstract: A code division multiple access communication system has a plurality of base stations. Each base station transmits a primary synchronization code (PSC) in a primary synchronization channel (PSCH). A user equipment monitors the PSCH and correlates the PSCH with the PSC. Using a result of the PSC correlation, PSCH locations are identified having a PSC peak. For each identified PSCH location, a quality factor comprising a shape factor associated with that location's PSC peak is determined. For each identified PSCH location, that identified PSCH location and the quality factor is stored. The PSCH locations and quality factors are accumulated over a number of frames and are processed using logic at algorithms to produce a reliable PSC detection.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: June 20, 2006
    Assignee: InterDigital Technology Corporation
    Inventor: Prabhaker R. Chitrapu
  • Cell search using peak quality factors
    Publication number: 20030117979
    Abstract: A code division multiple access communication system has a plurality of base stations. Each base station transmits a primary synchronization code (PSC) in a primary synchronization channel (PSCH). A user equipment monitors the PSCH and correlates the PSCH with the PSC. Using a result of the PSC correlation, PSCH locations are identified having a PSC peak. For each identified PSCH location, a quality factor comprising a shape factor associated with that location's PSC peak is determined. For each identified PSCH location, that identified PSCH location and the quality factor is stored. The PSCH locations and quality factors are accumulated over a number of frames and are processed using logic at algorithms to produce a reliable PSC detection.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Applicant: InterDigital Technology Corporation
    Inventor: Prabhaker R. Chitrapu