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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 fixed spectrum allocation strategy adopted by current wireless communication networks leads to the failure of many allocated frequency bands to be fully utilized in most cases. The emergence of cognitive radio technology provides a new idea for improving the spectrum utilization efficiency. It is the current research on communication technologies A hot direction. This article discusses some technologies related to cognitive radio, including spectrum sensing technology, cognitive radio technology based on ultra-wideband, cognitive radio system based on OFDM technology, and cognitive radio security issues. It is worth to pay attention to the future development of cognitive radio The direction of