Design of integer coefficients digital filter 數(shù)字濾波器設(shè)計
After compared lots of literatures and methods , we offer the norm for selecting different filters . that is to say , in arrhythmia analysis , the integer coefficient lowpass filter is adopted , while in heart rate variability analysis , the high pass filter designed by all - pass minus low - pass filter or filter which can remove both baseline wander and 50hz power - line frequency at one time is used 在對大量文獻(xiàn)進(jìn)行比較、研究的基礎(chǔ)上,針對不同的臨床應(yīng)用目的,提出了各種濾波器的選用準(zhǔn)則:在心律失常分析中選用整系數(shù)低通數(shù)字濾波器對原始心電信號進(jìn)行濾波;在對心率變異信號進(jìn)行分析時需先用低通濾波器濾波然后再采用全通減低通方法設(shè)計的高通濾波器或者一次性濾波器進(jìn)行濾波。