Using Hierarchical Filters to Detect Sparseness in Unknown Channels.

Christos Boukis Lazaros Polymenakos Using Hierarchical Filters to Detect Sparseness in Unknown Channels. 1224-1231 2006 conf/kes/2006-3 KES (3) http://dx.doi.org/10.1007/11893011_155 db/conf/kes/kes2006-3.html#BoukisP06