Editing Minimum phase (section)

== Minimum phase in the time domain ==
{{unsourced section|date=October 2023}}

For all [[causal]] and [[BIBO stability|stable]] systems that have the same [[frequency response|magnitude response]], the minimum-phase system has its energy concentrated near the start of the [[impulse response]]. i.e., it minimizes the following function, which we can think of as the delay of energy in the [[impulse response]]:
<math display="block">
 \sum_{n=m}^\infty |h(n)|^2 \quad \forall m \in \mathbb{Z}^+.
</math>