Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-01-10
2010-06-08
Phu, Phuong (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000, C375S150000, C375S362000, C375S343000, C370S342000, C370S335000
Reexamination Certificate
active
07733943
ABSTRACT:
An autocorrelation filter for use with a spread spectrum receiver. The autocorrelation filter can be used as a prefilter stage to reduce phase distortion present in a spread spectrum signal. The autocorrelation filter can be used to process the output from a lattice filter. The lattice filter is configured to remove magnitude distortion from the spread spectrum signal. The autocorrelation filter performs a series of correlations on the output of the lattice filter. The results of these correlations are integrated over a period of time to generate a running impulse response for characterizing and removing the phase distortion in the spread spectrum signal.
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Gossett Carroll Philip
Gunter Michial Allen
Fish & Richardson P.C.
Google Inc.
Phu Phuong
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