通过对单频采样信号的分析，应用匹配滤波原理在白噪声背景下最大限度提高信噪比。并构造了信号跳变沿定位的判别准则．给出了在低信噪比的条件下提取脉冲信号的重复周期、脉冲宽度等参数的算法。

This paper discusses a of single frequency sampled signal and sussests a algorithm to increase SNR using the theory of matched filtering in white noise and constructs a criterion for the decision of the pulse orientation. Then we sussest an algorithm which can extract the parameters of the pulse signal in low SNR.

TN974 TN957.51