After being out of school for ten years, this book proved to be essential for my M.S.E.E. course in Random Signals. This book concisely summed my undergraduate engineering Signals class with solved problems. In addition, the solved problems acted as a guideline for my Master's class. I felt that I could not have gotten through my class without this book.The reason why I ordered this book in the first place was the advice of my professor. My professor is a Ph.D. in the telecommunications workplace, acting as an adjunct professor. This working Ph.D. continues to use his well-worn Schaum's as a reference.