Focusing mainly on the engineering aspects of communications electronic warfare (EW) systems, this thoroughly updated and revised edition of a popular Artech House book offers a current and complete introduction to the subject. The second edition adds a wealth of new material, including expanded treatments of two critical areas - RF noise and the effects of signal fading. Extensively supported with over 700 equations, this authoritative resource details the components, systems, and operations of electronic warfare systems dedicated to protecting and attacking military communications networks. The book offers a complete understanding of how modern direction finders for communication signals work, along with their limitations. It shows how to measure performance and define the basic operations necessary for communication EW systems. Professionals learn how to identify state-of-the-art EW technology and gain a solid understanding of basic EW processes.