Computes the continuous wavelet transform (CWT) of the 1D input signal with real-valued wavelets. Wire data to the signal input to determine the polymorphic instance to use or manually select the instance.


icon

WA Continuous Wavelet Transform Details

The following equation defines the CWT:

where s(t) is the signal, is the mother wavelet function, and a and are the scale and shift of the wavelet, respectively. a can be any positive real value. Use user defined scales to specify the scales. If you do not specify values for user defined scales, this VI selects the scale, a, as 1, 2, 3,…, scales. This VI selects the shift, , as 0, dt, 2dt, 3dt,…, Ndt, where dt is time steps, and N is approximately equal to the signal length divided by time steps. Refer to A Wavelet Tour of Signal Processing for more information about the CWT.

Examples

Refer to the Breakdown Point Detection VI in the labview\examples\Wavelet Analysis\WAApplications directory for an example of using the WA Continuous Wavelet Transform VI.