Computes the single-sided power spectral density (PSD) of a univariate or multivariate (vector) time series using the multiple signal classification (MUSIC) method. The MUSIC method performs a comprehensive and accurate spectral analysis on multivariate time series. Wire data to the Xt input to determine the polymorphic instance to use or manually select the instance.


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Inputs/Outputs

  • cdbl.png sampling rate —

    sampling rate specifies the sampling rate, in hertz, of the univariate time series Xt. The default is 1.

  • ci32.png frequency bins —

    frequency bins specifies the number of frequency bins for which this VI computes the single-sided power spectral density PSD. The length of the single-sided PSD is (frequency bins/2+1). The default is 1024.

  • c2ddbl.png Xt —

    Xt specifies the multivariate (vector) time series. Each column of the 2D array represents a vector at certain time.

  • cu16.png window —

    window specifies the time-domain window applied on the time series in frequency computation.

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • cbool.png dB on? (T) —

    dB on? specifies whether this VI returns the PSD in decibels or in a linear scale. If dB on? is TRUE, this VI returns the PSD in decibels. If dB on? is FALSE, this VI returns the PSD in a linear scale. The default is TRUE.

  • cnclst.png subspace settings —

    subspace settings specifies options for the MUSIC method.

  • cdbl.png noise subspace (%) —

    noise subspace specifies the percentage of the noise subspace in the whole space, which is the combination of the signal subspace and the noise subspace. The default is -1, which means this VI calculates an appropriate value for the noise subspace.

  • cu16.png weighting —

    weighting specifies the weighting method for spectrum estimation.

  • icclst.png PSD —

    PSD returns information about the single-sided power spectral density (PSD).

  • idbl.png f0 —

    f0 returns the lower boundary, in hertz, of the frequency range.

  • idbl.png df —

    df returns the frequency increment, in hertz.

  • i1ddbl.png S(f) —

    S(f) returns the magnitude of the PSD at each frequency. The value of dB on? determines the unit of measurement for this parameter.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.