Talk:Anticausal system

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[edit] Time shifts

Hi there.

If so called "time shifts" are systems which transform a signal x(t) into a time shifted signal x(t-T), well, then, for what values of T can we say that the system is causal, and for what values can we say that it is not causal? Is this a stupid question?

Thanks!

Seb.

If your output is y(t) = x(t-T) and T >= 0, it is causal, as the output are previously known values (values read when t was smaller). If T < 0 it would be anticausal. --euyyn 00:50, 19 March 2007 (UTC)