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Methods and Apparatuses for Detection and Estimation with Fast Fourier Transform (FFT) in Orthogonal Frequency Division Multiplexing (OFDM) Communication Systems

  • US 20100082722A1
  • Filed: 09/26/2008
  • Published: 04/01/2010
  • Est. Priority Date: 09/26/2008
  • Status: Abandoned Application
First Claim
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1. An apparatus, comprising:

  • a plurality of butterfly operators that are operative with respective delay blocks in calculating a Fourier transform of a signal input;

    at least one complex multiplier; and

    a plurality of multiplexers that are configured to selectively operate the at least one complex multiplier to (i) calculate the Fourier transform of the signal input using the plurality of butterfly operators, or (ii) calculate one or both of an energy signal based upon the signal input, or at least one autocorrelation signal based upon the signal input and at least one delayed input from at least one delay block.

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