Bit synchronization method and system for a GPS

Details Bit synchronization method and system for a GPS Bit synchronization method and system for a GPS

2006-09-11

2010-06-29

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S142000, C375S143000

Reexamination Certificate

active

07746918

ABSTRACT:
A bit synchronization method and system for a GPS, which receives a satellite signal sent by a satellite to accordingly produce a synchronous signal. Each data bit of the satellite signal consists of N CA-codes. A data buffer receives and stores the data bits of the satellite signal. A matched filter filters the N CA-codes of each data bit in order to compute correlations of the N CA-codes of each data bit, and accordingly output a correlation set corresponding to the data bit, wherein the correlation set has N correlations. A selector selects one with the greatest value from the N correlations and uses the CA-code corresponding to the one with the greatest value as the synchronization signal.

REFERENCES:
patent: 7369631 (2008-05-01), Gifford et al.
patent: 2002/0048315 (2002-04-01), Hanada et al.
patent: 2003/0227963 (2003-12-01), Dafesh
patent: 2006/0114971 (2006-06-01), Muto
patent: 2007/0002987 (2007-01-01), Sinha et al.

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