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Per-bin DFE for advanced OQAM-based multi-carrier wireless data transmission systems

  • US 7,436,881 B2
  • Filed: 02/19/2002
  • Issued: 10/14/2008
  • Est. Priority Date: 09/28/2001
  • Status: Active Grant
First Claim
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1. A multi-carrier data transmission receiver comprising:

  • a subchannel demodulator arranged to demodulate one of a plurality of subchannels in a multi-carrier modulated data transmission system;

    a subchannel equalizer coupled to the subchannel demodulator and comprising a cascade of a feed-forward finite impulse response (FIR) filter with a feed-back finite impulse response (FIR) filter, the feed-back FIR filter receiving and processing a currently decided symbol in the subchannel;

    a second subchannel demodulator arranged to demodulate a second one of the plurality of subchannels in a multi-carrier modulated data transmission system;

    a second subchannel equalizer coupled to the second subchannel demodulator and comprising a cascade of a feed-forward finite impulse response (FIR) filter with a feed-back finite impulse response (FIR) filter, the feed-back FIR filter receiving and processing a currently decided symbol in the subchannel;

    at least two pulse amplitude modulation (PAM) slicers;

    a real extractor; and

    an imaginary extractor;

    wherein the real and imaginary extractors receive data from the feed-forward finite impulse response (FIR) filter and output data to the PAM slicers; and

    wherein data from the PAM slicers is provided to the feed-back finite impulse response (FIR) filter.

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