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。

Spectrum sensing technology is a key component of cognitive radio whose function is to find out the empty frequency bands quickly and reliably.

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频谱感知是认知无线电系统的关键技术之一，协作频谱感知能够提高频谱感知性能。

Spectrum sensing is one of the key technologies in cognitive radio, and cooperative spectrum sensing can improve the spectrum sensing performance.

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频谱感知是实现认知无线电技术的前提和基础。

Spectrum sensing is one of the prerequisite and basis of realize cognitive radio technology.

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