Spread spectrum receiver with multi-bit correlator

Details Spread spectrum receiver with multi-bit correlator Spread spectrum receiver with multi-bit correlator

2004-04-30

2010-06-01

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S149000, C375S343000

Reexamination Certificate

active

07729413

ABSTRACT:
A system and a method to track GPS (Global Positioning System) satellite signal in a GPS receiver that includes an expanded capture window to rapidly reacquire the satellite signal after the satellite signal has been obstructed or when there is other type of signal loss. The expanded capture window includes a plurality of additional early and late correlations for maintaining synchronization of the GPS signal with a generated replica signal when positional error has accumulated during the time of the signal loss. The plurality of additional early and late correlations may be delayed from each other by a multiple of a fraction of a chip and may be performed in one or multiple channels of the GPS receiver. The adjoining code samples in the replica signal may also be offset by a fraction of a chip or by a multiple of the fraction of a chip.

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EP Office Action of Jun. 9, 2009.
Polydoros A. et al.; “code synchronization: a review of principles and techniques” Spread Spectrum Techniques and Applications, 1994, IEEE ISSSTA 1994, IEEE 3rd International Symposium on Oulu, Finland Jul. 4-6, 1994, New York, NY., USA IEEE, Jul. 4, 1994, pp. 115-137, XP010129705 ISBN: 0-7803-1750-5.

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