Multiplex communications – Generalized orthogonal or special mathematical techniques – Quadrature carriers
Reexamination Certificate
2006-08-29
2006-08-29
To, Doris H. (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Quadrature carriers
C370S252000, C370S338000
Reexamination Certificate
active
07099267
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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DSP Group Inc.
Hyun Soon D.
Shumaker & Sieffert P.A.
To Doris H.
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