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Method of detecting a useful signal

  • US 8,102,137 B2
  • Filed: 04/03/2009
  • Issued: 01/24/2012
  • Est. Priority Date: 04/16/2008
  • Status: Expired due to Fees
First Claim
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1. A method of detecting a useful signal (N) from a measurement signal (M) that is overlaid by at least one interference signal (Σ

  • v), which occurs with at least one known interference signal frequency (v), and the useful signal (N) being utilized in a control or regulating device, the method comprising the steps of;

    detecting the measurement signal (M);

    performing a Fourier transformation (Fv(M)) of the measurement signal (M) only with reference to the known interference signal frequency (v) to detect an interference signal amplitude (AΣ

    ) and an interference signal phase (φ

    Σ

    );

    detecting the interference signal (Σ

    v) on a basis of the interference signal amplitude (AΣ

    ) and the interference signal phase (φ

    Σ

    ); and

    subtracting the interference signal (Σ

    v) from the measurement signal (M) to detect the useful signal (N).

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