The goal in wireless communication systems is to provide mobile, fully integrated, low cost, reliable, seamless systems with the capability of providing voice, high speed data, and video with minimum latency and long battery life. However, there are many obstacles and bottlenecks to achieving this in practice. These bottlenecks include the following:
This chapter of the report focuses on coding, modulation, and multiple-access techniques for wireless communications. To put the discussion in perspective, a short background on the development of wireless communication systems, focusing mainly on cellular systems is provided. The following sections discuss coding and modulation and various modulation techniques; present a comparative analysis of research and development in Europe, Japan, and the United States; and, finally, make recommendations for further research in wireless communications.