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Multiple-access hybrid OFDM-CDMA system

  • US 8,427,936 B2
  • Filed: 10/29/2003
  • Issued: 04/23/2013
  • Est. Priority Date: 10/18/2001
  • Status: Active Grant
First Claim
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1. In a multiple-access OFDM-CDMA system, a method for recovering data transmitted over a wireless communication channel, comprising:

  • processing a received signal to provide data samples;

    transforming the data samples in the frequency domain in accordance with a particular transformation to provide transformed samples;

    despreading the transformed samples with one or more sets of despreading coefficients to provide despread samples, wherein each set of despreading coefficients is associated with a respective despreading code that corresponds to a spreading code used to spread data prior to transmission and selected from a set of available spreading codes;

    combining the despread samples for each time interval to provide a demodulated symbol representative of a transmitted OFDM symbol; and

    decoding demodulated symbols to provide decoded data.

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