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|Note This topic contains information that applies to the LabVIEW Time Frequency Analysis Tools and the LabVIEW Wavelet Analysis Tools.|
Signal extension methods pad the borders of a signal to lessen discontinuity that might exist at the beginning and end of the signal. The Time Frequency Analysis Tools and Wavelet Analysis Tools provide the following three extension methods.
The following figure shows a linear chirp signal and the extended versions of this signal with the zero, symmetric, and periodic padding methods.
In the previous figure, the linear chirp signal appears from 100 s to 355 s. Notice the appearance of the extended signal when different extension methods pad the signal before 100 s and after 355 s.