×

Satellite-based positioning system improvement

  • US 7,463,189 B2
  • Filed: 10/04/2003
  • Issued: 12/09/2008
  • Est. Priority Date: 10/04/2002
  • Status: Active Grant
First Claim
Patent Images

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, tracking a set of the encoded signals and simultaneously determining the code phases of said set with respect to said epochs;

    wherein said encoded signals are comprised of a signal power spectrum and noise; and

    an aiding source to transmit information to the receiver,wherein said receiver is comprised of a processor controlling a program to extract a signal power spectrum from the noise by averaging across a moving average, wherein said averaging includes executing a FFT across said power spectrum in which squared magnitudes of the resulting FFT bins are filtered and wherein multiple FFT calculations are performed.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×