This practical 2005 handbook provides a comprehensive explanation of the WCDMA air interface of 3rd generation UMTS cellular systems.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 3rd 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). An ideal course book and reference for professional engineers, undergraduate and graduate students.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 3rd 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). An ideal course book and reference for professional engineers, undergraduate and graduate students.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.1. Introduction; 2. WCDMA in a nutshell; 3. Spreading codes and modulation; 4. Physical layer; 5. RF aspects; 6. Symbol rate processing functions. 7. Chip rate processing functions. 8. Layer 2 - MAC; 9. Layer 2 - RLC; 10. PDCP and BMC protocols; 11. Non al.