The use of mobile communication devices has grown phenomenally throughout the world during the last few years. With strong consumer demand to increase data delivery (large emails, browsing the Internet on wireless devices, transferring video images, etc.), engineers are faced with the challenge of enhancing CDMA to provide larger data capabilities while improving voice signals for clearer reception. In November 2001 the U.S. Federal Communications Commission released a much broader band of frequencies to wireless service providers, which will speed up the development of these systems.
Simulation results demonstrate the performance benefits of the proposed systems versus their third-generation predecessors Up-to-date overview of the standardised air interfacePreface 1. Introduction to Cellular Systems 2. Direct-Sequence Spread Spectrum Systems 3. The Mobile Channel and Diversity Reception in CDMA Systems 4. An Overview of IS-95 and cdma2000 5. 1X-EV: Evolution of cdma2000 6. WCDMA Overview 7. IS-95, cdma2000, 1X-EV, and WCDMA Performance 8. Handover in IS-95, cdma2000, 1X-EV, and WCDM Appendix: CDMA Transceivers Author Biographies IndexUntil now, most wireless devices have been used for voice transmission, but the new third generation of wireless devices promise greatly enhanced delivery of both voice and data communications. These devices are currently under development and are being built using the two major CDMA (code division multiple access) systems, cdma2000 and wideband CDMA. These telecommunication systems use signal codes to receive voice and data information. This authoritative new book reviews both of these systems and deals with the challenges engineers face in bringing these next generation devices to market.
The authors work at Nokia, one of the world's leading companies involved with the design, lĂ&