Please download the dossier by clicking on the dossier button x
×

Method and apparatus for rapidly estimating the doppler-error and other receiver frequency errors of global positioning system satellite signals weakened by obstructions in the signal path

  • US 6,331,836 B1
  • Filed: 08/24/2000
  • Issued: 12/18/2001
  • Est. Priority Date: 08/24/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for extracting Dö

  • ppler-error components from digitized signal samples transmitted by a satellite, said method comprising the steps of;

    receiving and digitizing said signals to produce digitized samples;

    squaring said digitized signal samples to produce squared samples;

    decimating said squared samples;

    auto-correlating said squared samples to produce an auto-correlate; and

    transforming said auto-correlate to the frequency domain.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×