Objective To study the application of dual-frequency impedance pneumography and adaptive filter for reducing motion artifacts in respiration monitoring.
目的对应用双频率阻抗测试和自适应处理技术相结合的方法消除呼吸阻抗测量中的运动干扰问题进行一些探索性的研究。
Adaptive filtering
英语例句库
Abstract: Objective To study the application of dual-frequency impedance pneumography and adaptive filter for reducing motion artifacts in respiration monitoring.
目的对应用双频率阻抗测试和自适应处理技术相结合的方法消除呼吸阻抗测量中的运动干扰问题进行一些探索性的研究。
Numerical simulation studies indicate that the adaptive filter is a powerful noise suppresser for correlated interferences, especially for those with amplitude changing and time delay.
数值模拟结果表明该滤波器对于相关噪声，尤其是有幅值变化和时间延迟的情况，有很强的抑制效果。
A new variable step-size LMS adaptive filtering algorithm is presented, which makes use of the intercorrelation function of the relative output error signal to control the new variable step-size.
针对上述问题，提出了一种新的变步长LMS自适应滤波算法，它采用相对的误差互相关函数来控制步长更新。
中文百科
自适应滤波器 Adaptive filter
（重定向自Adaptive filtering）
自适应滤波器是能够根据输入信号自动调整性能进行数字信号处理的数字滤波器。作为对比，非自适应滤波器有静态的滤波器系数，这些静态系数一起组成传递函数。
对于一些应用来说，由于事先并不知道所需要进行操作的参数，例如一些噪声信号的特性，所以要求使用自适应的系数进行处理。在这种情况下，通常使用自适应滤波器，自适应滤波器使用反馈来调整滤波器系数以及频率响应。
总的来说，自适应的过程涉及到将代价函数用于确定如何更改滤波器系数从而减小下一次迭代过程成本的算法。价值函数是滤波器最佳性能的判断准则，比如减小输入信号中的噪声成分的能力。
英语百科
Adaptive filter 自适应滤波器
（重定向自Adaptive filtering）
An adaptive filter is a system with a linear filter that has a transfer function controlled by variable parameters and a means to adjust those parameters according to an optimization algorithm. Because of the complexity of the optimization algorithms, almost all adaptive filters are digital filters. Adaptive filters are required for some applications because some parameters of the desired processing operation (for instance, the locations of reflective surfaces in a reverberant space) are not known in advance or are changing. The closed loop adaptive filter uses feedback in the form of an error signal to refine its transfer function.