Signal receiver for integrating and combining integrations...

Details Signal receiver for integrating and combining integrations... Signal receiver for integrating and combining integrations...

2005-05-24

2005-05-24

Le, Amanda T. (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S354000, C370S320000, C342S357490

Reexamination Certificate

active

06898234

ABSTRACT:
A GPS receiver for integrating a GPS signal separately in a series of “A” type and “B” type time segments, the “A” segments alternating with the “B” time segments; combining the squares of the magnitudes of “A” time segment integrations corresponding to code phases for forming “A” type combined magnitudes; combining the squares of the magnitudes of the “B” time segment integrations corresponding to code phases for forming “B” type combined magnitudes; and determining an acquisition code phase of the signal from the strongest of the “A” or “B” combined magnitudes. The “A” time segments and the “B” time segments are one-half the period of the data bits of the signal, thereby ensuring that either the “A” time segments or the “B” time segments avoid the nullifying effect of data bit inversions.

REFERENCES:
patent: 5577025 (1996-11-01), Skinner et al.
patent: 6606346 (2003-08-01), Abraham et al.

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