Editing Bipolar signal (section)

{{onesource|date=December 2009}}

In [[telecommunications]], a '''bipolar signal''' is a [[signal]] which may assume either of two polarities, neither of which is zero.  

A bipolar signal may have a two-state [[non-return-to-zero]] (NRZ) or a three-state [[return-to-zero]] (RZ) [[binary coding]] scheme. 

A bipolar signal is usually symmetrical with respect to zero amplitude, ''i.e.'' the absolute values of the positive and negative signal states are nominally equal.  Contrast with [[unipolar encoding]] where one state is zero amplitude.<ref>{{Cite web |title=bipolar signal |url=https://www.oxfordreference.com/display/10.1093/oi/authority.20110803095507645 |access-date=2024-09-25 |website=Oxford Reference |language=en }}</ref>