认知无线电中频谱感知技术的研究进展

认知无线电技术作为解决当前频谱利用率低下这一问题的有效手段,已成为无线电发展的一个新的里程碑。频谱感知作为实现认知无线电的首要任务,主要涉及物理层的信号检测与处理以及链路层的控制与优化。文中对频谱感知技术的最新研究进展情况进行了综述,重点总结和分析了检测算法的性能、协作融合算法以及感知机制的参数优化,并在此基础上讨论了下一步的研究方向。

A Survey on Spectrum Sensing Techniques in Cognitive Radio Networks

Cognitive Radio （CR） is an effective solution to the problem of low spectrum utilization, and a milestone in wireless communications. For CR, spectrum sensing is a fundamental problem which relates to signal detection and processing in the physical layer, and control and optimization in the link layer. A survey of developments in spectrum sensing is conducted in this paper, focusing on the performance of detection algorithms, fusion schemes in cooperative sensing, and optimization of the sensing mechanism. Following a summary and analysis, main challenges and directions of future work are discussed.