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Real-time system for measuring the ricean K-factor

  • US 20020027951A1
  • Filed: 02/06/2001
  • Published: 03/07/2002
  • Est. Priority Date: 02/08/2000
  • Status: Active Grant
First Claim
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1. A method for measuring the Ricean K-factor of a wireless channel in real-time, comprising the steps of:

  • (a) obtaining an amplitude sample;

    (b) computing the magnitude squared of the sample to obtain the power gain and computing the magnitude squared of the power gain;

    (c) calculating the sum of the power gain and the magnitude squared of the power gain for a window of amplitude samples;

    (d) final averaging the sums of the window of amplitude samples to estimate the first and second moments of the window of samples;

    (e) inputing the final average to obtain estimates for the time average of the power gain Ga and rms deviation of the power gain Gv about Ga;

    G^a=1N



    i=1N


    xi




    and,


    G^v=1N



    i=1N


    xi2
    -G^a2
    ;

    and


    (f) computing the K-factor in accordance with;

    K=Ga2-Gv2Ga-Ga2-Gv2.

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