This book describes wireless communication systems and concepts from modeling, simulation, testing, and wireless systems analyzing (along with wireless circuits) using modern instrumentation and computer aided design software. Readers learn how to model, simulate, test, and analyze wireless systems (along with wireless circuits) using modern instrumentation and computer aided design software. The book is structured in such a way that it can be used in support of various wireless courses at all levels and can serve as a reference for research projects for both undergraduate and graduate students. This book complements traditional theoretical textbooks by also introducing some practical aspects.