TSA Capon Frequency Estimator VI

Owning Palette: Modeling and Prediction VIs

Requires: Advanced Signal Processing Toolkit

Uses the Capon method to estimate the leading frequency components of a univariate time series. The Capon method uses a nonparametric method based on finite impulse response (FIR) filters to estimate the signal spectrum. Wire data to the Xt input to determine the polymorphic instance to use or manually select the instance.

Example

TSA Capon Frequency Estimator (Waveform)

	sorting order specifies the order in which this VI returns the frequency components. 0 Power Descending (default)—Orders the frequency components by power beginning with the largest power. 1 Frequency Ascending—Orders the frequency components by frequency beginning with the smallest frequency.
	Xt specifies the univariate time series.
	FIR filter length specifies the length, in samples, of the finite impulse response (FIR) filter this VI uses to estimate the PSD. FIR filter length must be less than n–10 where n is the length of Xt.
	frequency band specifies the start and the end of the frequency band this VI observes. start specifies the starting frequency, in hertz, of the frequency band. The default is 0. end specifies the ending frequency, in hertz, of the frequency band. The default is 0.5.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	frequency components returns information about the frequency components this VI estimates. frequency returns the frequency between start and end, in hertz, of each frequency component this VI estimates. power returns the power, in the square of the unit of Xt, of each frequency component this VI estimates.
	error out contains error information. This output provides standard error out functionality.

TSA Capon Frequency Estimator (Real)

	sorting order specifies the order in which this VI returns the frequency components. 0 Power Descending (default)—Orders the frequency components by power beginning with the largest power. 1 Frequency Ascending—Orders the frequency components by frequency beginning with the smallest frequency.
	sampling rate specifies the sampling rate, in hertz, of the univariate time series Xt. The default is 1.
	Xt specifies the univariate time series.
	FIR filter length specifies the length, in samples, of the finite impulse response (FIR) filter this VI uses to estimate the PSD. FIR filter length must be less than n–10 where n is the length of Xt.
	frequency band specifies the start and the end of the frequency band this VI observes. start specifies the starting frequency, in hertz, of the frequency band. The default is 0. end specifies the ending frequency, in hertz, of the frequency band. The default is 0.5.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	frequency components returns information about the frequency components this VI estimates. frequency returns the frequency between start and end, in hertz, of each frequency component this VI estimates. power returns the power, in the square of the unit of Xt, of each frequency component this VI estimates.
	error out contains error information. This output provides standard error out functionality.

TSA Capon Frequency Estimator (Complex)

	sorting order specifies the order in which this VI returns the frequency components. 0 Power Descending (default)—Orders the frequency components by power beginning with the largest power. 1 Frequency Ascending—Orders the frequency components by frequency beginning with the smallest frequency.
	sampling rate specifies the sampling rate, in hertz, of the univariate time series Xt. The default is 1.
	Xt specifies the univariate time series.
	FIR filter length specifies the length, in samples, of the finite impulse response (FIR) filter this VI uses to estimate the PSD. FIR filter length must be less than n–10 where n is the length of Xt.
	frequency band specifies the start and the end of the frequency band this VI observes. start specifies the starting frequency, in hertz, of the frequency band. The default is 0. end specifies the ending frequency, in hertz, of the frequency band. The default is 0.5.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	frequency components returns information about the frequency components this VI estimates. frequency returns the frequency between start and end, in hertz, of each frequency component this VI estimates. power returns the power, in the square of the unit of Xt, of each frequency component this VI estimates.
	error out contains error information. This output provides standard error out functionality.

Example

Refer to the Leading Frequency Estimator VI in the labview\examples\Time Series Analysis\TSAGettingStarted directory for an example of using the TSA Capon Frequency Estimator VI.