The method can effectively reduce noise interference of the detecting circuit and increase signal noise ratio of the output signal.

该方法可有效地降低检测电路的噪声干扰，提高输出信号的信噪比。

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In the receiving system, the narrow-band interference filter is introduced in order to reduce the background light, increase the signal transmission rate, and improve the signal-to-noise ratio.

在接收系统中，引进窄带干涉滤光片，减少背景光的干扰，增加信号光透射率，改善信噪比。

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This method is not only suitable for the signals with white noise but also suitable for strong interference color noise and low signal-noise-ratio signals.

该方法不仅适用于白噪声情况，同样还适用于强干扰色噪声的情况，同时它还适用于低信噪比的情况。

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