Cognitive radio: brain-empowered wireless communications

作者：S. Haykin · 发表于：IEEE Journal on Selected Areas in Communications · 年份：2005 · DOI：10.1109/jsac.2004.839380 · 被引用次数：12017 · 研究领域：Cognitive Radio Networks and Spectrum Sensing、Advanced Adaptive Filtering Techniques、Advanced MIMO Systems Optimization

Cognitive radio is viewed as a novel approach for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. The cognitive radio, built on a software-defined radio, is defined as an intelligent wireless communication system that is aware of its environment and uses the methodology of understanding-by-building to learn from the environment and adapt to statistical variations in the input stimuli, with two primary objectives in mind: /spl middot/ highly reliable communication whenever and wherever needed; /spl middot/ efficient utilization of the radio spectrum. Following the discussion of interference temperature as a new metric for the quantification and management of interference, the paper addresses three fundamental cognitive tasks. 1) Radio-scene analysis. 2) Channel-state estimation and predictive modeling. 3) Transmit-power control and dynamic spectrum management. This work also discusses the emergent behavior of cognitive radio.