Sorting continuous-time signals and the analog median filter
Paulo J. S. G. Ferreira · IEEE Signal Processing Letters · 2000
Continuous time signals can be meaningfully "sorted," or rearranged, leading to precise formulations of analog median filters and other variants of ranked order filters. The proposed interpretation leads to a broader view of the analog median and related filters and provides a framework for discussing the correct definitions in spaces such as L/sub 1/ or L/sub 2/ and certain issues regarding continuity and root signals.