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本文介绍了二种取消指端脉搏波中噪声的自适应滤波器结构。自适应滤波从根本上使原始输入与参考输入之间的均方差达到最小，从而提取出信号、消去噪声。这里原始转入为一个带嗓的脉搏波，参考输入则选为与脉膊波中噪声成份相关的另一噪声。结果表明，自适应滤波可有效地移去脉搏波中的基线飘移和50HZ的电源干扰。
This paper presents two kinds of adaptive filter structures to cancel the noise in the finger pulse wave. Adaptive filtering fundamentally minimizes the mean square error between the original input and the reference input, extracting the signal and eliminating noise. Here the original is a pulse wave with throat and the reference input is selected as another noise related to the noise component in the pulse wave. The results show that adaptive filtering can effectively remove the baseline drift in the pulse wave and 50HZ power interference.