1. Introduction.- 2. Fundamentals.- 3. Spread Spectrum Techniques.- 4. Code Division Multiple Access.- 5. Introduction to UMTS.- 6. UTRA FDD Mode.- 7. UTRA TDD Mode.- 8. UMTS Transceiver Design Issues.- B. QoS Parameters for Bearer Services.- C. UTRA FDD Reference.- C.1 Environmental Conditions.- C.1.1 Temperature.- C.1.2 Voltage.- C.1.3 Vibration.- C.2 Downlink DPDCH Slot Formats.- C.3 Uplink DPDCH Slot Formats.- C.4 Quantization of the Gain Factors.- C.5 Scrambling Code Generation.- C.5.1 Uplink Scrambling Code.- C.5.2 Downlink Scrambling Code Generator Polynomials.- C.6 Synchronization Codes.- C.7 OCNS.- D. UTRA TDD Reference.- D.1 Channelization Code Specific Multiplier.- D.2 Weight Factors.- D.3 Gain Factors.- D.4 Synchronization Codes.- E. List of Acronyms.- References.

It took more than 15 years of research, standardization work, and develop­ ment with an enormous effort of manpower to bring third generation (3G) wireless communication systems to life. The first research work on 3G sys­ tems started around 1988 [1]. At this time the striking success of second generation (2G) systems, especially of GSM (Global System for Mobile Com­ munications), was not yet evident. A substantial part of these early research activities took place in Europe and was sponsored by the European Commis­ sion in the course of research programs such as: Research and Development of Advanced Communications Technologies in Europe (RACE-I, RACE-2) and Advanced Communications Technology and Services (ACTS) [2]. Even before these activities, 3G systems were considered in 1992 at the WARC (World Administrative Radio Conference), where 230 MHz of spectrum around 2 GHz was identified for 3G, and in standardization bodies like the ITU (Interna­ tional Telecommunications Union) from a global perspective and ETSI (Eu­ ropean Telecommunications Standards Institute) in Europe. At the present time 3G networks are deployed or are already operating (e. g. , in Japan the first commercial 3G system started its service in October 2001). Unfortu­ nately, the initial idea to create one single 3G standard to allow for seam­ less world-wide roaming could not be realized. However, three of the five members of the so-called IMT-2000 (International Mobile Telecommunica­ tions, the official acronym for 3G systems) family of standards are based on Wideband-CDMA (Code Division Multiple Access).