Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-04-18
2006-04-18
Patel, Jay K. (Department: 2637)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S142000, C375S343000
Reexamination Certificate
active
07031376
ABSTRACT:
A fast initial acquisition and search device for a spread spectrum communication system is disclosed herein. The search device includes a memory for storing the first code sequence, and a plurality of computation circuits coupled in parallel to the memory. The search device also includes a plurality of threshold detector circuits. Each of the plurality of threshold detector circuits is respectively coupled to one of the plurality of computation circuits. Each of the plurality of computation circuits implements a unique phase offset for a second code sequence with respect to the first code sequence. A correlation operation is performed in parallel at each of the plurality of computation circuits followed by a threshold evaluation that indicates whether the correlation result satisfied a threshold value.
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Jha Uma
Medlock Joel D.
Darby & Darby
Infineon - Technologies AG
Lugo David B.
Patel Jay K.
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