Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2008-04-01
2008-04-01
Phu, Phuong (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S346000, C375S148000, C375S144000, C375S147000
Reexamination Certificate
active
07352833
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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