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SignalProcessing.Compute.Modify.Shift

This node shifts a signal by the given time M.
There are three different modes that can be selected via the mode input:
  • Mode = 0: zero
  • Mode = 1: periodic
  • Mode = 2: extend

Zero mode

In zero mode, the shifted signal \mathrm{y}[n] is generated from the input signal \mathrm{x}[n] with
\mathrm{y}[n] = \mathrm{x}[n - M].
The length of the signal is unchanged. Undefined values are set to zero.

Periodic mode

In periodic mode, the shifted signal \mathrm{y}[n] is generated from the input signal \mathrm{x}[n] with
\mathrm{y}[n] = \mathrm{x}[n - M \bmod N]
where N is the length of the signal.

Extend mode

In extend mode, the shifted signal \mathrm{y}[n] is generated from the input signal \mathrm{x}[n] with
\mathrm{y}[n] = \mathrm{x}[n - M].
The length of the signal is extended: \text{length}(\mathrm{y}) = \text{length}(\mathrm{x})+ \text{abs}(M).
Undefined values are set to zero.