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Determination of the time delay and/or power of a multicarrier signal

  • US 20050243937A1
  • Filed: 05/27/2003
  • Published: 11/03/2005
  • Est. Priority Date: 05/28/2002
  • Status: Active Grant
First Claim
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1. A method of determining the time shift and/or power of a received signal incorporating a reference sequence (3) and transmitted by multicarrier modulation on a set (M) of carriers spaced from each other by a distance nΔ

  • f where n is a natural integer and Δ

    f is a constant, wherein the method comprises;

    determining a phase variation representative of the phase variation between two components of the reference sequence of the received signal on two carriers separated by kΔ

    f, where k is an integer, for at least two consecutive values of k, applying an inverse Fourier transform to the representative phase variations obtained in order to obtain the impulse response (RI) of the signal, and determining the time shift τ

    0 and/or the power of the received signal from the impulse response by observation of the highest level amplitude peak.

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