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SATELLITE-BASED POSITIONING SYSTEM IMPROVEMENT

  • US 20090102709A1
  • Filed: 03/08/2008
  • Published: 04/23/2009
  • Est. Priority Date: 10/04/2002
  • Status: Abandoned Application
First Claim
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1. In an SPS system for identifying the location of a receiver in the presence of satellite signal attenuation having a plurality of orbital satellites sending synchronized encoded signals on a carrier frequency wherein said encoded signals have repeated epochs containing synchronization data:

  • a receiver for detecting, acquiring, and tracking a set of the encoded signals and simultaneously determining the code phases of said set with respect to said epochs;

    an aiding source to transmit information to the SPS system, andwherein said receiver is comprised of a processor executing an algorithm for computing an initial approximate location from measured satellite Doppler differences.

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