Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2003-10-02
2008-08-26
Nguyen, Chau (Department: 2619)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S503000, C375S354000
Reexamination Certificate
active
07417945
ABSTRACT:
The present invention discloses a transmitter and receiver for use with an orthogonal frequency division multiplexing (OFDM) communications system. In one embodiment, the OFDM communications system includes an OFDM transmitter that generates a training sequence that includes a fractional tone in a guard band thereof and transmits the training sequence via a channel. The OFDM communications system further includes an OFDM receiver that receives the training sequence and employs the fractional tone to obtain a channel response estimate.
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van de Beek et al; On Channel Estimation in OFDM Systems; 1995 IEEE; pp. 815-819.
Yang et al; Analysis of Low-Complexity Windowed DFT-Based MMSE Channel Estimator for OFDM Systems; 2001 IEEE, vol. 49, No. 11, Nov. 2001; pp. 1977-1987.
Dey Sourav R.
Magee David P.
Brady W. James
Kang Suk Jin
Nguyen Chau
Shaw Steven A.
Telecky , Jr. Frederick J.
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