Cognitive radio: Brain-empowered wireless communications
Cognitive radio: Brain-empowered wireless communications
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DOI：
10.1109/jsac.2004.839380
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发表时间：
2005-02-01
影响因子：
16.4
通讯作者：
Haykin, S
中科院分区：
文献类型：
--
作者：
Haykin, S
认知无线电被认为是一种改进利用宝贵的自然资源的新方法：无线电电磁频谱。认知无线电建立在软件定义无线电的基础上，被定义为一种智能无线通信系统，它可以感知M环境，并使用构建理解的方法从环境中学习并适应输入刺激的统计变化，主要目标有两个：无论何时何地需要高度可靠的通信；无线电频谱的有效利用。在讨论了干扰温度作为一种量化和管理干扰的新度量之后，本文讨论了三个基本的认知任务。1)无线电场景分析。2)信道状态估计与预测建模。3)发射功率控制和动态频谱管理。本文还讨论了认知无线电的应急行为。
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 M 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.