Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Reexamination Certificate
2011-06-07
2011-06-07
Ogard, Edan (Department: 2466)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
Reexamination Certificate
active
07957265
ABSTRACT:
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprising: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals; a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals; a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter; and a controller programmed to instruct the transmitter to transmit a coarse timing adjustment followed by at least one secondary timing adjustment, wherein the secondary timing adjustment is a fine tuning adjustment with respect to the coarse timing adjustment.
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Brede Jeffrey
Geile Michael J.
ADC Telecommunications Inc.
Fogg & Powers LLC
Ogard Edan
Patel Jay P
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