When UHF broadcasting came along, empty “guard bands” were added to each channel for the same reason.
而当超高频广播出现时，每个频道基于同样的理由，也加上了空闲的“保护频带”。
When UHF broadcasting came along, empty "guard bands" were added to each channel for the same reason.
而当超高频广播出现时，每个频道基于同样的理由，也加上了空闲的“保护频带”。
Spectrum sensing technology is a key component of cognitive radio whose function is to find out the empty frequency bands quickly and reliably.
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.
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。
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