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OFDM Multiple Sub-Channel Communication System

  • US 20070183308A1
  • Filed: 04/16/2007
  • Published: 08/09/2007
  • Est. Priority Date: 06/11/2001
  • Status: Abandoned Application
First Claim
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1. A transmitter for transmitting an OFDM signal in a communications channel, including:

  • (a) a plurality of base-band OFDM modulators, each for modulating a respective baseband data signal onto a plurality of orthogonal sub-carriers and outputting a respective baseband sub-channel OFDM signal; and

    (b) 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.

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