Architecture Evolution.

This chapter conveys a deeper understanding of the roots of the software radio. This includes the technical evolution that has resulted in today's emphasis on SDR, and it includes the management motivations toward realizing appropriately tailored implementations. The chapter begins with an introduction to technology-demographics, a method for studying architecture. The chapter then characterizes the need for software-radio architecture. Because of the intense interest of the commercial and military sectors, and because of the fragmentation of industry into competing groups, there are competing goals for software radio evolution within standards organizations. These goals are considered in some detail since they set the stage for the competition of technical ideas. The chapter concludes with a roadmap of software-radio architecture evolution, and a section of exercises for the reader. [ABSTRACT FROM PUBLISHER]