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== Causal System Definition == | == Causal System Definition == | ||
| − | A causal system is one whose output at some current time <math>t_0</math> only depends on some input, <math>x(t)</math>, at the current <math> | + | A causal system is one whose output at some current time <math>t_0</math> only depends on some input, <math>x(t)</math>, at the current <math>t_0</math> or a <math>t</math> in the past, never from <math>x(t)</math> at a future <math>t</math>. |
== Non-Causal System Definition == | == Non-Causal System Definition == | ||
A non-causal system is one whose output at some time <math>t</math> depends on future inputs as well as possibly past or current inputs. | A non-causal system is one whose output at some time <math>t</math> depends on future inputs as well as possibly past or current inputs. | ||
Revision as of 10:25, 17 September 2008
Causal System Definition
A causal system is one whose output at some current time $ t_0 $ only depends on some input, $ x(t) $, at the current $ t_0 $ or a $ t $ in the past, never from $ x(t) $ at a future $ t $.
Non-Causal System Definition
A non-causal system is one whose output at some time $ t $ depends on future inputs as well as possibly past or current inputs.
