books.google.co.in - Intended for use in an undergraduate course in electrical engineering, this book provides a modern treatment of signals and systems. It will prepare students for senior-level courses in communication systems, control systems, and digital signal processing (as encountered in digital audio), radar, radio,...http://books.google.co.in/books/about/Signals_and_systems.html?id=QA9LAQAAIAAJ&utm_source=gb-gplus-shareSignals and systems
