WVD Spectrogram PtByPt VI

Owning Palette: Spectral Analysis PtByPt VIs

Requires: Full Development System

Computes the signal energy distribution in the joint time-frequency domain using the Wigner-Ville distribution algorithm.

This VI is similar to the WVD Spectrogram VI.

Note  By default, reentrant execution is enabled in all Point By Point VIs.

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	initialize, when TRUE, initializes the internal state of the VI.
	x is an input data point.
	sample length is the length of each set of incoming data. The VI performs computation on each set of data. The default is 100. sample length must be greater than 0.
	time increment controls the time intervals of the Wigner-Ville Distribution. You express time increment in units of samples. The default is 1. For example, if you sample the time waveform at fs Hz, the spacing between the rows of WVD Spectrogram {X} is time increment/fs seconds. Increasing time increment decreases the computation time and reduces memory requirements but also reduces time-domain resolution. Decreasing time increment improves time-domain resolution but increases the computation time and memory requirements.
	WVD Spectrogram {X} is a 2D array that describes the energy distribution of x in the joint time-frequency domain. The number of rows, time axis, in WVD Spectrogram {X} is equal to the number of elements in the time waveform divided by time increment and then rounded up.
	error returns any error or warning from the VI. You can wire error to the Error Cluster From Error Code VI to convert the error code or warning into an error cluster.