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    • 2. 发明申请
    • ADAPTIVE NOTCH FILTER
    • 自适应过滤器
    • WO2012145571A1
    • 2012-10-26
    • PCT/US2012/034354
    • 2012-04-20
    • DRAEGER MEDICAL SYSTEMS, INC.ZHENG, LingCHEN, Yu
    • ZHENG, LingCHEN, Yu
    • A61B5/04A61B5/0428
    • A61B5/7203A61B5/04017A61B5/0428A61B5/0472H04B1/109
    • A patient monitoring device and method that determines and monitors at least one patient parameter is provided. A configuration processor generates configuration information in response to a first input signal and an adaptive notch filter receives a second input signal. The second input signal includes a signal of interest and an interference signal in a predetermined frequency range. The adaptive notch filter automatically estimates the interference signal within the second input signal based on a filter parameter and removes the estimated interference signal from the second input signal to generate a target signal. A step processor is electrically coupled between the configuration processor and the adaptive notch filter and sets a value of the filter parameter based on the configuration information, wherein the adaptive notch filter uses the filter parameter to reduce a ringing artifact on the target signal below a threshold level.
    • 提供了确定和监视至少一个患者参数的患者监测装置和方法。 配置处理器响应于第一输入信号产生配置信息,并且自适应陷波滤波器接收第二输入信号。 第二输入信号包括感兴趣的信号和预定频率范围内的干扰信号。 自适应陷波滤波器基于滤波器参数自动估计第二输入信号内的干扰信号,并从第二输入信号中去除估计的干扰信号以产生目标信号。 步进处理器电耦合在配置处理器和自适应陷波滤波器之间,并且基于配置信息设置滤波器参数的值,其中自适应陷波滤波器使用滤波器参数来减少低于阈值的目标信号上的振铃伪影 水平。