Sampling Functions

The functions described in this section manipulate signal samples. Sampling functions are used to change the sampling rate of the input signal and thus to obtain the signal vector of a required length. The functions perform the following operations:

Insert zero-valued samples between neighboring samples of a signal (up-sample).
Remove samples from between neighboring samples of a signal (down-sample).

The upsampling and downsampling functions are used by some filtering functions described in Chapter 6.

SampleUp
Up-samples a signal, conceptually increasing its sampling rate by an integer factor.
SampleDown
Down-samples a signal, conceptually decreasing its sampling rate by an integer factor.