December 2005
Intermediate to advanced
475 pages
12h 6m
English
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1.12 CLASSIFICATIONS OF DISCRETE TIME SYSTEMS
The discrete time systems can be classified as follows:
- Static/Dynamic
- Causal/Non-Causal
- Time invariant/Time variant
- Linear/Non-Linear
- Stable/Unstable
1.12.1 Static and Dynamic Systems
The system is said to be static if its output depends only on the present input. On the other hand, if the output of the system depends on the past input, the system is said to be dynamic.
For example, y(n) = 5x(n) and y(n) = 2x2(n) +3x(n) are the static systems whereas y(n) = x(n) + 2x(n–1) represents the dynamic system.
1.12.2 Causal and Non-Causal Systems
If the output of the system depends on the past and presents input only, the system is said to be a causal system. On the other hand, if the output of the system ...
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