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Signals & SystemsZ-Transform

The bilateral Z-transform of x[n] is defined as?

  • AΣ x[n]z^(-n) over all integer n
  • BΣ x[n]z^n for n=0 only
  • Cx[n]/z
  • Ddx[n]/dn
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Correct Answer: A. Σ x[n]z^(-n) over all integer n
Explanation: The bilateral Z-transform is X(z)=Σ from n=-∞ to ∞ x[n]z^(-n).
Reference: Standard signals and systems: z-transform
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