This textbook goes at the heart of telecommunications engineering by explaining the concepts and linking them to how things are designed by standards bodies and implemented by infrastructure manufacturers. Tailored to senior undergraduate and graduate students and newly practicing engineers, this book presents the fundamental concepts in a concise manner but retaining the rigor needed to truly understand wireless communications. Importantly, the book ties these developments to how these concepts are implemented in fielded systems, discussing the motivations behind the design choices made in 4G and 5G wireless communications. The book bridges the gap between theory and application, presenting the fundamental developments while tying the concepts to the work of 3GPP and how networks are implemented. Furthermore, the book covers some key practical issues. The book features a full suite of classroom materials including PowerPoints, a solutions manual and tutorials.