OFDM multiple sub-channel communication system

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

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Details

C370S208000, C370S210000, C708S313000, C455S422100

Reexamination Certificate

active

10166872

ABSTRACT:
A transmitter and corresponding method for transmitting an OFDM signal in a communications channel, including a plurality of base-band OFDM modulators, each for modulating a respective data signal onto a plurality of orthogonal sub-carriers and outputting a respective sub-channel OFDM signal; and a fast convolution filter and up-converter for applying fast convolution filtering and digital up-conversion to the sub-channel OFDM signals to output a combined OFDM signal that includes each of the sub-channel OFDM signals, the fast convolution and up-converter filtering each of the sub-channel OFDM signals and frequency shifting all of the sub-channel signals to respective designated frequencies within the combined OFDM signal. A corresponding receiver is also provided.

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patent: 6400699 (2002-06-01), Airy et al.
patent: 6487252 (2002-11-01), Kleider et al.
patent: 6594322 (2003-07-01), Dapper et al.
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patent: 6898235 (2005-05-01), Carlin et al.
patent: 2001/0037351 (2001-11-01), Hellberg
patent: 2002/0055356 (2002-05-01), Dulin et al.
patent: 2002/0136276 (2002-09-01), Franceschini et al.
patent: WO 00/79817 (2000-12-01), None
patent: WO 01/05032 (2001-01-01), None

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