4 Discrete LTI
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Transcript of 4 Discrete LTI
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Chapter 2Discrete LTIPrepared by Dr. Taha MAhdy
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Discrete vs. continuousThe same concepts.a discrete time signal is one for which the time variable is defined only at specific discrete times. Such a signal can be realized by sampling a continuous time signal x(t) to form a collection or list of numbers x[n].
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The difference between successive time steps is called the sampling interval.
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Important Formulas
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The unit impulse
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Similar conceptsEven and odd functionsSketching System properties (linearity, time invariant, stability, causality, memory)Replace integral with summationEvery thing work as continuous
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Discrete Linear Time-Invariant Systems
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Compute the convolution
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The result
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Compute convolution
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Block Diagram andDifference equations
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Homework
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Next lecture (Z transform)The following lecture, the midterm.