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中文摘要：
感知无线电可以自动感知外界的无线环境并能调整系统参数以适应环境的变化。频谱检测是感知无线电的关键技术之一，要求感知用户可靠、快速地检测频谱空洞。文中按照主用户发射端检测和主用户接收端检测，对当前的主要频谱检测算法进行了分类，并对频谱检测算法进行了讨论和对比研究，给出了在IEEE802．22和频谱池结构中的频谱检测的具体应用。
英文摘要：
Cognitive radio has both the ability to sense the spectral environment and the flexibility to adapt transmission parameters. Spectrum sensing technology is a key component of cognitive radio whose function is to find out the empty frequency bands quickly and reliably. This paper classifies the mainly spectrum sensing algorithms according to primary transmitter detection and primary receiver detection and makes contrast of them. Finally, the detailed spectrum sensing process in the environment of IEEE802.22 and spectrum pool is presented.
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