Tri T. Ha is a Professor in the Department of Electrical and Computer Engineering at the Naval Postgraduate School (NPS), Monterey, California, a position he has held since 1989. Prior to joining NPS he worked at Fairchild Industries and GTE, and he was an Associate Professor at Virginia Tech for four years. He is an IEEE Fellow who has written two previous textbooks, and his current research interests are in wireless communications and cyber warfare.