Developed out of a successful professional engineering course, this practical handbook provides a comprehensive explanation of the Wideband CDMA (Code Division Multiple Access) air interface of third generation UMTS cellular systems. The book addresses all aspects of the design of the WCDMA radio interface from the lower layers (RF and baseband processing) to the upper layers of the protocol architecture (non-access stratum and RRC layers). This is an ideal course book and reference for students and professional engineers.