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Method of factorizing pseudodistance time of week in an assisted GNSS context

  • US 20050174285A1
  • Filed: 01/27/2005
  • Published: 08/11/2005
  • Est. Priority Date: 01/28/2004
  • Status: Active Grant
First Claim
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1. A method of calculating the position (or point) of a mobile device, said method employing an assistance data server for providing aid with solving the point of said mobile device and said mobile device comprising means for communicating with the server via a cellular mobile telephone network and means for receiving positioning signals from a satellite positioning system using a spread spectrum access technique, said method comprising the following steps:

  • following reception of said positioning signals, the device sends said server a set of spreading code phases corresponding to the satellites acquired, said code phases having a single time of week indication corresponding to the transmission time of one of the code phases, said server deduces from said information the transmission times corresponding to said code phases and said pseudodistances, and said server solves said point.

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