认知无线电——智能的无线通信技术  

Cognitive Radio——an Intelligent Wireless Communications

作　　者：盛惠兴[1] 霍冠英[2] 王海滨[2] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]河海大学计算机及信息工程学院,江苏常州213022

出　　处：《计算机测量与控制》2007年第11期1419-1421,共3页Computer Measurement &Control

摘　　要：认知无线电,以软件定义无线电为平台,是一种智能的无线通信技术;它能够感知周围的环境(外部世界),使用累积理解的方法从周围环境中逐步学习,根据射频输入激励的变化实时改变传输参数(如发射功率、载波频率、调制策略),使系统的通信规则与输入的射频激励相适应,确保无论何时何地都可以进行高度可靠的通信和无线电通信频谱的有效利用,并以更为灵活的方式来管理宝贵的频谱资源。The cognitive radio, based 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 its internal states to statistical variations in the incoming RF stimuli by making corresponding changes in certain operating parameters （e, g. , transmit-power, carrier-frequency, and modulation strategy） in real-time. It is ensured highly reliable communications and efficient utilization of the radio spectrum whenever and wherever. The precious spectrum resourece is managed in manner of more flexible.

关 键 词：认知无线电 信道状态估计 频谱空穴 功率控制 频谱管理 

分 类 号：TN92[电子电信—通信与信息系统]