qualization, and resource allocation. These include inter-numerology-interference (INI) analysis of OFDM and its variants, e.g. windowed orthogonal frequency division multiplexing (W-OFDM), F-OFDM, new signal detection methods, effective resource allocation, and intelligent handoff algorithms while consider- ing INI issues. The second part of the book will cover RAN slicing and virtualization and their applications to V2X communications, ultra-reliable low-latency communications (URLLC), etc. Additionally, the book will discuss resource sharing and optimization. Flexible function split and the design of access control and handoff policies for RAN slicing will also be discussed, followed by RAN function split, spectrum sharing, and optimizing resource allocation. The book is suitable for telecom engineers and industry actors to aid them identify realistic and cost-effective concepts that are uniquely tailored to support specific vertical industries. Moreover, researchers, professors, doctorate and postgraduate students would Preface also benefit from this book, as it enables them to identify open issues and classify their research based on the existing literature. While beginners can learn about the novel tech- niques to characterize different modulation schemes, experienced researchers, scientists, and experts from industry can understand the extensive theoretical design fundamentals, research trends, and in particular, various perspectives on the air interface design for the future networks. Additionally, the book aims at providing in-depth knowledge to 5G stakeholders, regulators, institutional actors, and research agencies on how 5G networks can seamlessly support vertical industries and aid them in making the right choice of the techniques/architectures while designing the next generation of wireless communication systems. The book is split into two parts: Part I is focused on the PHY layer aspects including modulation and signaling methods, channel estimation, and mixed numerology, and Part II is focused on 