Does

What does z^(-1) represent here?

What does z^(-1) represent here?
  1. What does Z 1 represent?
  2. What does Z represent in Z transform?

What does Z 1 represent?

In a typical filter, z−1 represents the input to the filter delayed by one sample.

What does Z represent in Z transform?

So, in this case, z is a complex value that can be understood as a complex frequency. It is important to verify each values of r the sum above converges. These values are called the Region of Convergence (ROC) of the Z transform.

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