Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2011-01-18
2011-01-18
Torres, Juan A (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
07873097
ABSTRACT:
A receiver despreads a spread spectrum sequence by partially despreading the spread spectrum sequence using an outer spreading code, and then despreading the partially despread sequence using an inner spreading code. This can advantageously save processing power. In one embodiment, the outer spreading code is despread with an analog circuit, and an inner spreading code is despread with a digital circuit. A modulator for a transmitter can generate a spread spectrum sequence by direct-sequence spreading data to generate a partially spread sequence and then spreading the partially spread sequence to generate the spread spectrum sequence.
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Jones Keith R.
Luecke James R.
Interstate Electronics Corporation
Knobbe Martens Olson & Bear LLP
Torres Juan A
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