认知无线电的关键技术和应用研究

认知无线电是一种新的智能无线电技术,它通过动态的接入频谱为用户提供高容量的服务,能极大的改善现有的低效的频谱利用率。文章重点分析了认知无线电中频谱检测、频谱管理、功率控制等关键技术,以及认知无线电在超宽带、Mesh网、无线区域网的应用现状,最后探讨了认知无线电发展需要关注的难点问题。

Investigation on the Key Techniques and Applications of Cognitive Radio

Cognitive radio is a new intelligent radio technique, it can provide large capacity services for users by dynamic spectrum access, improve the ineffective utilization of spectrum in existence. This paper starts with the concept of cognitive radio, focuses on the key techniques, such as spectrum detection, spectrum management and power control, as well as the applications of cognitive radio in ultra-wide-band, Mesh network and wireless area network. Finally it discusses the possible problems of cognitive radio which need to be paid attention to in its future development.