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Method of despreading GPS signals

  • US 20050162311A1
  • Filed: 03/21/2005
  • Published: 07/28/2005
  • Est. Priority Date: 02/06/2001
  • Status: Active Grant
First Claim
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1. A method of despreading a target GPS spread spectrum signal containing pseudorandom noise (PRN) code sequences and received by a GPS receiver, the method comprising the steps of:

  • providing Doppler information relating to an estimate of the variation in Doppler shift as observed on the target signal by the GPS receiver and which is attributable to the motion of the GPS satellite; and

    correlating the target signal with a reference signal containing corresponding PRN code sequences, wherein, in the course of a single dwell, the correlation is modified as a function of the Doppler information.

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