Enhanced frequency domain equalization in OFDM communication
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United States of America Patent
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Aug 29, 2006
Grant Date -
Feb 27, 2003
app pub date -
Mar 29, 2002
filing date -
Aug 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A technique for enhanced frequency domain equalization in an OFDM communication receiver enables derivation of a more accurate estimate of channel gain fluctuation by adding an additional frequency tone observation to the estimate. For example, the technique may involve estimation of an unknown, complex, channel-induced gain A based on observation of complex amplitude values for first and second preamble symbols transmitted in an OFDM frame, plus the complex amplitude value for a signal field in the OFDM frame. The enhanced frequency domain equalization technique may be especially useful in a network conforming to the IEEE 802.11a standard.
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