@article{TUW-106505, author = {Matz, Gerald and Hlawatsch, Franz}, title = {Wigner distributions (nearly) everywhere: time-frequency analysis of signals, systems, random processes, signal spaces, and frames}, journal = {Signal Processing}, year = {2003}, volume = {83}, pages = {1355--1378}, url = {http://publik.tuwien.ac.at/files/pub-et_7182.pdf} }