Variable clock rate correlation circuit and method of operation
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United States of America Patent
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Dec 2, 2003
Grant Date -
N/A
app pub date -
Jul 6, 1999
filing date -
Jul 10, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable rate correlation circuit for conserving power includes a variable clock source, a local PN source, and a correlator. The local PN source further includes a local generator and a resampler. The variable clock source provides a normal clock rate and a lower clock rate. The local generator supplies the local PN sequence at the normal clock rate. The resampler receives the local PN sequence sampled at the normal clock rate and outputs the local PN sequence sampled at the lower clock rate. The correlator receives the lower sampled local PN sequence, the received PN sequence, and the lower clock rate signal, correlating the received and local PN sequences at the lower clock rate to produce a. correlated result.
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