Yu Chao, Li Gang, Lin Ling
College of Precision Instrument & Opto-electronic Engineering, Tianjin University, Tianjin 300072, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2007 Aug;24(4):780-4.
Adaptive coherent model can be easily implemented and it can simultaneously reject the power-line interference and baseline wander. But the relevancy of the filter's bandwidth at low-frequency and power-line interference limits its application on ECG filtering. A part fast Fourier transform (FFT) algorithm is presented. It is used to track power-line frequency and adjust the sample frequency. Experiments show that the method still rejects interference efficiently despite of the slow fluctuation of power-line frequency.
自适应相干模型易于实现，并且能够同时抑制电力线干扰和基线漂移。但是，该滤波器在低频时的带宽与电力线干扰的相关性限制了它在心电图滤波中的应用。本文提出了一种部分快速傅里叶变换（FFT）算法。它用于跟踪电力线频率并调整采样频率。实验表明，尽管电力线频率存在缓慢波动，该方法仍能有效地抑制干扰。
