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2 - Lecture 2 Discrete-Time Systems and z-Transform...

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1 Lecture 2: Discrete-Time Systems and z -Transform Discrete-time signals v.s. continuous-time signals Discrete-time systems v.s. continuous-time systems z -Transform Inverse z -Transform z -Transform for solving linear difference equations Continuous-Time Signals A signal that changes continuously in time: Defined at all times t (no gap) Signal can take arbitrary values Example: temperature, position, velocity,… e ( t ) ; ¡1 < t < 1 ; or t ¸ 0 e ( t ) t
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