Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-01-12
2010-10-26
Payne, David C (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S140000, C375S143000, C370S209000, C370S320000, C370S342000, C455S506000
Reexamination Certificate
active
07822108
ABSTRACT:
The invention provides a Code Division Multiple Access (CDMA) receiver for sampling a received CDMA signal into a plurality of samples. The CDMA receiver comprises a sampling control module, a code generator, and a plurality of despreaders. The sampling control module delays the samples for a plurality of different delay lengths to obtain a plurality of delayed samples respectively corresponding to each of the delay lengths, and adjusts timing of a sampling trigger signal and a code generation trigger signal according to a sampling timing adjustment signal. The code generator generates a despreading code according to the code generation trigger signal. Each of the despreaders is configured for decimating the delayed samples corresponding to each delay lengths according to the sampling trigger signal to obtain a plurality of decimated delayed samples, and despreads the decimated delayed samples with the despreading code to obtain a plurality of output signals.
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Hsu Ching-Chia
Li Sung-Chiao
Peng Chi-Yuan
File Erin M
Payne David C
Thomas Kayden Horstemeyer & Risley
Via Technologies Inc.
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