Adaptive and Cognitive UWB Radio and a Vision for Flexible Future Spectrum Management

The continuing intense debate on introduction of ultra wideband (UWB) communications has focused on concerns about interference into and by other communication systems, and resulted in much research into how to mitigate it. Adaptive techniques to mitigate interference are summarized. The definition and use of "cognitive" and other hyperbolic and anthropomorphic terms are discussed. Developments in UWB cognitive radio (CR) to minimize interference, maximize capacity, share the radio spectrum more efficiently, and more, are summarized, and their foundations in, and linkage to, software defined radio (SDR) are noted. Motivated by measurements showing, e.g., typical spectrum utilization of about 30% below 3 GHz and 0.5% in the 3-6 GHz frequency band, CR techniques for sharing the radio spectrum by wireless systems, including UWB wireless radio, are succinctly described, and a vision for flexible, dynamic spectrum management is advanced.