1Lecture 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 equationsContinuous-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;ort¸0e(t)t
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