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Explain the Discrete Time Systems?
A system operates on an input signal, x[n] and output the results, y[n]. For example, a digital filter (a system) can be represented by the following block diagram. The input, x[n] and output, y[n] are the excitation and response of the filter respectively.
Characteristics of systems are
1. Linear
2. Time invariant
3. Shift invariant
4. Causal
5. Stability
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