books.google.com - This book presents introductory and advanced topics in the areas of signal theory and processing as specifically applied to acoustic echo-location. It is written at the senior undergraduate or graduate level and assumes some familiarity with signal processing subjects such as linear and complex algebra,...http://books.google.com/books/about/Echo_signal_processing.html?id=NF2Tmty9nugC&utm_source=gb-gplus-shareEcho signal processing
