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Mobile terminal implementing a ranging signal receiver and method

  • US 7,269,424 B2
  • Filed: 10/16/2002
  • Issued: 09/11/2007
  • Est. Priority Date: 10/16/2002
  • Status: Expired due to Fees
First Claim
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1. A mobile terminal comprising:

  • a radio subsystem operable to receive a radio signal;

    a ranging signal receiving subsystem for receiving digital television (DTV) signals for use as terrestrial ranging signals, a DTV signal comprising synchronization bursts which are equally spaced in time;

    a filter operatively connected to and shared in common with both the radio subsystem and the ranging signal receiving subsystem, the filter having a bandpass that is smaller than a bandwidth of the DTV signal; and

    a correlation subsystem operatively connected to the filter, the correlation subsystem operable to enable recovery of the synchronization bursts without demodulating the DTV signal by correlating the DTV signal with a known sequence that has been predistorted to account for the bandpass of the filter.

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