Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-06-05
2007-06-05
Marcelo, Melvin (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S210000
Reexamination Certificate
active
10185572
ABSTRACT:
The disclosed embodiments relate to reducing adjacent channel interference in an OFDM receiver. An error metric is monitored and the carrier frequency of the desired channel is slowly adjusted in response to the error metric. In this manner, the received OFDM signal, including the desired signal corrupted by the adjacent interfering channel, may be shifted until the zero crossings of the adjacent channel line up with the FFT bins. A multi-tap equalizer may then be used to remove the inter-bin interference that results from the frequency offset in the desired channel.
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Author: Nobuyuki Kataoka & Ryuji Kohno, Title: Adaptive Equalizer Including Frequency-Offset Compensator for Multi-Carrier Communications Systems, Date: Sep. 1998, Published by: The Division of Electrical and Computer Engineering, Yokohama National University, Yokohama Japan, pp. 1076-1080.
Belotserkovsky Maxim B.
Litwin, Jr. Louis Robert
Duffy Vincent E.
Laks Joseph J.
Marcelo Melvin
Pugel Michael A.
Thomson Licensing
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