CCK demodulation via symbol decision feedback equalizer
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United States of America Patent
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Apr 28, 2009
Grant Date -
Mar 25, 2004
app pub date -
Jun 12, 2003
filing date -
Jun 12, 2002
priority date (Note) -
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Abstract
Demodulation techniques for a wireless communication system make use of a decision feedback equalization (DFE) technique to mitigate the effects of multipath channel characteristics on receiver performance. The techniques may be particularly useful in the demodulation of complementary code keying (CCK) symbols. A demodulator that performs such techniques may include a time-variant or time-invariant matched filter, a feedback intersymbol interference (ISI) canceller, a transform unit, a phase rotation estimator and corrector, a pattern-dependent bias canceller, and a maximum picker for symbol decisions. The transform unit may include a bank of correlators, or alternatively a fast Walsh transform unit.
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