Z-Transform
We need first review some related concepts:
- Laplace transform: It transforms a function of a real variable \(t\) (often time) to a function of a complex variable \(s\) (complex frequency).
- Fourier transform:
- Z-transform converts a discrete-time signal, which is a sequence of real or complex numbers, into a complex frequency-domain representation.
Unilateral Z-transform
\[X(z)=Z\{x[n]\}=\sum_{n=0}^\infty x[n]z^{-n}\]Unfortunately, there is no off-the-shelf python library for Z-tranform computation.
(A possible alternative is the Chirp z-Transform algorithm)
Further discussion is remain to be continued.