The z-transform of the discrete time signal x(n) = u(n)u(n) with '' being convolution is

A) $$\frac{1}{{{{\left[ {1 - {z^{ - 1}}} \right]}^2}}},\,{\text{ROC}}:\left| z \right| < 1$$ B) $$\frac{1}{{{{\left[ {1 - {z^{ - 1}}} \right]}^2}}}{\text{,}}\,{\text{ROC}}:\left| z \right| > 1$$ C) $$\frac{1}{{{{\left[ {1 - z} \right]}^2}}}{\text{,}}\,{\text{ROC}}:\left| z \right| > 1$$ D) $$\frac{1}{{{{\left[ {1 - z} \right]}^2}}}{\text{,}}\,{\text{ROC}}:\left| z \right| < 1$$

Answer & Solution

Correct Answer: Option B

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