摘要
认知无线电是一种智能的无线通信系统,能够感知周围的无线环境,通过一定的方法相应地改变某些工作参数来实时地适应环境,从而达到提高频谱利用率、缓解频谱资源紧张的目的。频谱感知是认知无线电中最具挑战的问题之一。详细介绍了认知无线电中的频谱感知技术,并对频谱感知技术发展中面临的问题进行了讨论。
Cognitive 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 by making corresponding changes in certain operating parameters in real time, in order to promote the efficient use of the spectrum and revive the lack of spectral resource. Spectrum sensing is one of the most challenging problems in cognitive radio. In this paper, spectrum sensing of cognitive radio is explained in detail. Moreover,the challenges in spectrum sensing are discusses.
出处
《科技信息》
2008年第32期101-102,共2页
Science & Technology Information
关键词
认知无线电
频谱资源
频谱感知
cognitive radio
spectrum resource
spectrum sensing,
