Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-09-04
2007-09-04
Kumar, Pankaj (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
11199407
ABSTRACT:
Apparatus and methods for determining the timing of the data bit transitions. “N” assumptions of data bit transitions are used for determining N integrations of an incoming spread signal for data bit time periods where N is the data bit time period divided by the code time period. In a first variation, the N assumptions use N start times separated by code time periods. In a second variation, the N assumptions use N sign inversion times separated by code time periods. In either variation the unsigned values of the N integrations, respectively, may be combined for several data bit time periods. The assumed transition timing that results in the strongest of the N integrations is indicative of the timing of the data bit transitions.
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patent: 6407699 (2002-06-01), Yang
Gildea David R.
Kumar Pankaj
Menlo Patent Agency LLC
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