Z-transform

The one-sided Z-transform maps a discrete-time sequence to a function of a complex variable, turning difference equations into algebraic ones. It is used in digital signal processing and control theory to analyse and design discrete-time systems.

X(z) = \sum_{n=0}^{\infty} x_n z^{-n}

What the symbols mean

Z-transform of the sequence, a function of the complex variable z
the n-th term of the discrete sequence, for n = 0, 1, 2, ...
complex variable
discrete time index (integer)

About this formula

  • FieldEngineering
  • TopicSignal processing
  • LevelUniversity
  • Also calledunilateral Z transform, one-sided Z-transform, Z transform formula, discrete-time Laplace transform, transform of a discrete sequence, sequence to frequency domain transform
  • SourceWikidata Q135810

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