Abstract
 

Third Generation (3G) wireless access systems are under development to provide advanced data services along with basic voice and messaging services.  WCDMA is an approach that is being considered by many operators.  Enhanced Data rates for GSM Evolution (EDGE) is another approach that is attractive for existing TDMA & GSM operators, particularly if they will need to deploy 3G services in existing spectrum. The evolution of TDMA to EDGE will be discussed and key technology enhancements described.  With the introduction of broadband access in the fixed network with technologies such as cable modems and ADSL, demand for wireless service at bit rates exceeding 1 Mbps with wide-area coverage is likely.  A 4G Wideband OFDM downlink combined with 3G uplinks such as EDGE is one promising path to provide peak downlink bit rates of 5 to 10 Mbps.  4G concepts and approaches based on Wideband OFDM Techniques for operation in a wide area cellular environment will be discussed.

About the Speaker:

Nelson Sollenberger heads the Wireless Systems Research Department at AT&T Labs - Research in Red Bank, NJ.  His department performs research on next generation wireless systems concepts and technologies including high speed transmission methods, smart antennas and adaptive signal processing, system architectures and radio link techniques to support wireless multimedia and advanced voice services.

Nelson received his Bachelor's degree from Messiah College (1979) and his Master's degree from Cornell University (1981), both in Electrical Engineering.  From 1979 through 1986 he was a member of the cellular radio development organization at Bell Laboratories.  At Bell Laboratories, he investigated spectrally efficient analog and digital technologies for second-generation cellular radio systems.  In 1987, he joined the radio research department at Bellcore, and he was the head of that department from 1993 to 1995. In 1995, he joined AT&T.  Nelson is both an IEEE Fellow and an AT&T Fellow.