低压配电网电力线噪声可以分为背景噪声、与工频同步的周期性噪声、突发性噪声、窄频带噪声等。

The noises on low- voltage power networks are classified four types including background noise, periodic noise, burst noise and narrow band noise.

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现场存在着各种各样的噪声，其中，白噪声和周期性窄带干扰是两类重要的干扰。

There have many kinds of noises in site, thereinto white noise and periodic narrowband noise are tow important noises.

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根据推导结果设计了一种从白噪声中检测周期性信号的算法。

We design the algorithm to detect periodic signal from white noise by the derivation.

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