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文件名称：Cognitive radio_ brain-empowered wireless communications
文件大小：558KB
文件格式：PDF
更新时间：2017-12-06 03:39:08
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Abstract—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:
• highly reliable communication whenever and wherever
needed;
• 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 paper also discusses the emergent behavior of cognitive radio.