On the basis of analyzing the basic features of impact signal noise from reactor loose parts, the wavelet nonlinear threshold value filtering method for the use of impact signal extraction is studied.

在分析反应堆松动部件冲击信号噪声基本特征基础上，利用小波非线性阈值滤波方法对冲击信号的提取进行了研究。

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The signal modulation of velocity deception jamming is complex, and it is hard to complement anti jamming using the statistical feature extraction method.

速度欺骗干扰因信号调制较为复杂，难以用统计特征提取方法来实现抗干扰。

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In the paper, the calculating method of signal extraction filter pass-band according to the paper-counting speed and the utility circuit of separating strong interference in pass-band are given.

并针对点钞速度给出了信号提取滤波器通频带的计算方法，以及在带内分离强干扰的实用电路。

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