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Ioannis Pitas (AUTH)
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This lecture overviews discrete-time Signals and Systems topics. Discrete-time signals are presented: periodic signals, delta signal, unit step signal, exponential signal, trigonometric signals, complex exponential signal. Linear Shift-Invariant (LSI) systems are then presented in detail. 1D convolution and correlation, their properties and several examples are coming next. Finally, FIR and IIR systems are overviewed and examples are given, e.g., moving average filter, numerical differentiator.
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