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Global positioning method, terminal, and system

  • US 6,437,736 B2
  • Filed: 05/09/2001
  • Issued: 08/20/2002
  • Est. Priority Date: 12/28/1998
  • Status: Expired due to Fees
First Claim
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1. A global positioning system (GPS) positioning method comprising:

  • obtaining data having a polarity from a GPS signal, changing the polarity based on navigation data and cumulatively summing the data at corresponding same bit positions per portion corresponding to a clear and acquisition (C/A) code length to produce a sum, computing correlation between the sum and a C/A code, detecting a correlation peak position based on a correlation peak value obtained from computing the correlation, and detecting a pseudo range between a GPS terminal and a satellite corresponding to the C/A code, based on the correlation peak position.

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