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Process of sampling

Bilateral Z-transform | Unilateral Z-transform | Geophysical definition | Inverse Z-transform | Region of convergence | Examples conclusion | Properties | Linear constant-coefficient difference equation | Zeros and poles | Output response |


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Consider a continuous time signal . Its one sided Laplace transform is defined as:

If the continuous time signal is uniformly sampled with a train of impulses to get a discrete time signal , then it can be represented as:

where is the sampling interval.

Now the Laplace transform of the sampled signal (discrete time) is called Star transform and is given by:

It can be seen that the Laplace transform of an impulse sampled signal is the star transform and is the same as the Z transform of the corresponding sequence when . Similar relationship holds when a continuous time system is converted into a sampled data system by cascading an actual impulse sampler at the input and a fictitious impulse sampler at the output.[7]


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Relationship to Laplace transform| Relationship to Fourier transform

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