摘要
当前无线通信网络采用的固定频谱分配策略导致许多已分配的频段在大多数情况下未能被充分利用,认知无线电技术的出现为提高频谱利用率提供了一条新的思路,是当前通信技术研究的一个热点方向。本文论述了认知无线电相关的一些技术,包括频谱感知技术、基于超宽带的认知无线电技术、基于OFDM技术的认知无线电系统、认知无线电安全问题等,探讨了认知无线电未来发展值得关注的方向。
The current many frequency bands are not used efficiently in most time due to the fixed spectrum assignment policy of today＇ s wireless networks. Cognitive Radio is a novel approach for improving the utilization of radio spectrum. It is a hot research direction of communications technology, this paper treats correlation techniques of CR, including spectrum sensing, CR technology based on UWB, CR system based on OFDM, the CR security problem and so on, it discusses the direction of cognitive radio which need to be paid attention to in its future development.
出处
《通信技术》
2008年第12期63-65,共3页
Communications Technology
关键词
认知无线电
超宽带
频谱感知
cognitive radio
Ultra Wideband
spectrum sensing
