@Article{wigner-eusp03, author = {G. Matz and F. Hlawatsch}, title = {{W}igner distributions (nearly) everywhere: {T}ime-frequency analysis of signals, systems, random processes, signal spaces, and frames}, journal = {Signal Processing, special section ``{F}rom Signal Processing Theory to Implementation´´ on the occasion of the 65th birthday of W. Mecklenbr\"auker}, volume = {83}, number = {7}, pages = {1355--1378}, year = {2003} }