(New page: == Formal Definition == A system can be called causal if the output at any given time only depends on the input in the present and past, not the future. == Example of A Casual System == <...) |
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Latest revision as of 13:18, 18 September 2008
Formal Definition
A system can be called causal if the output at any given time only depends on the input in the present and past, not the future.
Example of A Casual System
$ y(t) = x(t-1) $
Example of A Non-Casual System
$ y(t) = x(t+1) $
