Invention Grant
US08077659B2 Method and apparatus for locating mobile multimedia multicast system capable wireless devices 有权
用于定位具有无线设备的移动多媒体多播系统的方法和装置

  • Patent Title: Method and apparatus for locating mobile multimedia multicast system capable wireless devices
  • Patent Title (中): 用于定位具有无线设备的移动多媒体多播系统的方法和装置
  • Application No.: US12110671
    Application Date: 2008-04-28
  • Publication No.: US08077659B2
    Publication Date: 2011-12-13
  • Inventor: Nabil Yousef
  • Applicant: Nabil Yousef
  • Applicant Address: US CA Lake Forest
  • Assignee: Newport Media, Inc.
  • Current Assignee: Newport Media, Inc.
  • Current Assignee Address: US CA Lake Forest
  • Agency: Rahman LLC
  • Main IPC: H04W4/00
  • IPC: H04W4/00
Method and apparatus for locating mobile multimedia multicast system capable wireless devices
Abstract:
Estimating a current location of a receiver in a MediaFLO™ (Forward Link Only) mobile multimedia multicast system comprises receiving digital signals comprising a MediaFLO™ superframe comprising orthogonal frequency division multiplexing (OFDM) symbols; performing slot 3 processing of each medium access control (MAC) time unit of a data channel to identify a transmitter identity (TxID) of each transmitter; identifying corresponding geographical coordinates of each TxID; regenerating the digital signals for each of the transmitters using a local-area differentiator (LID) and a wide-area differentiator (WID) of the transmitters; dividing the digital signals by the corresponding regenerated transmitted signal to obtain channel estimates between the receiver and the corresponding transmitters; detecting a first peak in the channel estimates to determine a distance between the receiver and the corresponding transmitters; calculating a time difference of arrival of the digital signals; and estimating a current location of the receiver.
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