Open Radio Access Networks (O-RAN) Systems Architecture and Design gives a jumpstart to engineers developing O-RAN hardware and software systems, providing a top-down approach to O-RAN systems design. The book gives an introduction into why wireless systems look the way they do before introducing relevant O-RAN and 3GPP standards. The remainder of the book discusses hardware and software aspects of O-RAN system design, including dimensioning and performance targets. This book is intended for hardware and software engineers as well as product managers and consumers of O-RAN products who are looking to understand O-RAN technologies. Presents O-RAN and 3GPP standards Provides a top-down approach to O-RAN systems design Includes practical examples of relevant elements of detailed hardware and software design to provide tools for development Gives a few practical examples of where O-RAN designs play in the market and how they map to hardware and software architectures