Method and apparatus for error reduction in an orthogonal modulation system
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United States of America Patent
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Apr 1, 2008
Grant Date -
May 25, 2006
app pub date -
Jan 5, 2006
filing date -
Dec 22, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to each subcarrier or is based on a determination of excessive signal power overdriving an amplifier of the receiving communication device. Equalization of the received signal is based on an equalization function that reduces a multipath delay introduced to the transmitted signal when the multipath delay exceeds a tolerable multipath delay.
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