认知无线电的频谱感知技术探讨

Research on spectrum sensing technology of cognitive radio

频谱感知允许非许可用户伺机访问未用的许可频带资源,可以极大改善频谱利用率,并且具有较低的部署成本和较好的兼容性。文中首先介绍了认知无线电中频谱感知的相关概念。然后,详细探讨了频谱感知的基本技术手段和面临的挑战。最后,对频谱感知的设计问题进行了说明。

Spectrum sensing is a kind of technology which allows unauthorized users waiting for access to the unused licensed band resource,and it can greatly improve the spectrum utilization rate with a lower cost of deployment and better compatibility in this paper,the author firstly introduces related concepts of spectrum sensing in cognitive radio,and then discusses its basic technical means as well as its challenges in detail,and its design issues are explained in the last part.