Digital transmission is integrated deeply in our everyday life. Mobile networks, video conferences, wireless networks are all applications of digital communications. This book on digital communications and networks covers in detail some existent theories and innovative concepts, such as wireless communications, networking, information security, signal processing, synchronization and scheduling issues in mobile and ad hoc networks, etc. This book includes contributions of experts and scientists which will provide innovative insights into this field. Students, researchers, professionals and all associated with digital communication and allied disciplines will benefit alike from this book.