Introduction

Since the mid 1990s, a wind of change has blown through the world of spectrum management, transforming the way engineers, administrators and politicians think about the use of the airwaves. There has been a concerted attempt to liberalise the sector (i.e. to make it more open to market forces), but these attempts have not been as successful as many had hoped. It has been suggested that the liberalisation agenda has achieved all it can, and a new paradigm is developing where the focus is sharing spectrum.