Discriminator function for GPS code alignment

Details Discriminator function for GPS code alignment Discriminator function for GPS code alignment

2005-11-28

2010-06-22

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S139000, C375S343000, C375S147000, C375S140000, C375S150000

Reexamination Certificate

active

07742518

ABSTRACT:
Embodiments of the present invention pertain generally to methods and systems of processing a global positioning satellite (GPS) signal. More particularly, embodiments of the present invention provide an improved discriminator function that utilizes the early, prompt, and late correlator values. For example, the improved discriminator function may be normalized based on all three of the early, prompt, and late correlator values. The improved discriminator function behaves linearly across a prescribed region whose width depends on the separation between correlators.

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Kaplan et al., “Understanding GPS: Principles and Applications”, 1996, pp. 142-150.
Van Dierendonck et al., “Theory and Performance of Narrow Correlator Spacing in a GPS Receiver”, “Navigation: Journal of the Institute of Navigation”, Oct. 1992, pp. 265-283, vol. 39, No. 3, Publisher: Institute of Navigation, Published in: US.

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