Karthikeyan Umapathy Sridhar Krishnan Time-Width Versus Frequency Band Mapping of Energy Distributions. 978-989 2007 55 IEEE Transactions on Signal Processing 3 http://doi.ieeecomputersociety.org/10.1109/TSP.2006.887131 db/journals/tsp/tsp55.html#UmapathyK07