求帮助编写一个六阶巴特沃斯低通滤波器,截止频率为35HZ,采样频率为100HZ,求matlab的此程序啊,
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求帮助编写一个六阶巴特沃斯低通滤波器,截止频率为35HZ,采样频率为100HZ,求matlab的此程序啊,
帮助编写一个六阶巴特沃斯低通滤波器,截止频率为35HZ,采样频率为100HZ,求matlab的此程序啊,
帮助编写一个六阶巴特沃斯低通滤波器,截止频率为35HZ,采样频率为100HZ,求matlab的此程序啊,
/* 6th Order Low Pass Butterworth */
/* Bilinear Transformation with Prewarping *//* Sample Frequency = 100.0 Hz *//* Standard Form *//* Arithmetic Precision = 4 Digits *//* *//* Pass Band Frequency = 35.00 Hz *//* *////* *//* Input Variable Definitions: *//* Inputs: *//* invar float The input to the filter *//* initvar float The initial value of the filter *//* setic int 1 to initialize the filter to the value of initvar *//* *//* There is no requirement to ever initialize the filter. *//* The default initialization is zero when the filter is first called */float DigFil(invar, initval, setic) float invar, initval; int setic; {
float sumnum, sumden; int i; static float delay[7] = {0.0,0.0,0.0,0.0,0.0,0.0,0.0}; static float znum[7] = { .1477, .8864, 2.216, 2.955, 2.216, .8864, .1477 }; static float zden[6] = { 2.183e-02, .2099, .8779, 2.055, 2.91, 2.38 }; if (setic==1){ for (i=0;i<=6;i++) delay[i] = .1058*initval; return initval; } else{ sumden=0.0; sumnum=0.0; for (i=0;i<=5;i++){ delay[i] = delay[i+1]; sumden += delay[i]*zden[i]; sumnum += delay[i]*znum[i]; } delay[6] = invar-sumden; sumnum += delay[6]*znum[6]; return sumnum; }}
matlab的没有,不过你可以将其C语言转换成Matlab的仿真一下!
/* Bilinear Transformation with Prewarping *//* Sample Frequency = 100.0 Hz *//* Standard Form *//* Arithmetic Precision = 4 Digits *//* *//* Pass Band Frequency = 35.00 Hz *//* *////* *//* Input Variable Definitions: *//* Inputs: *//* invar float The input to the filter *//* initvar float The initial value of the filter *//* setic int 1 to initialize the filter to the value of initvar *//* *//* There is no requirement to ever initialize the filter. *//* The default initialization is zero when the filter is first called */float DigFil(invar, initval, setic) float invar, initval; int setic; {
float sumnum, sumden; int i; static float delay[7] = {0.0,0.0,0.0,0.0,0.0,0.0,0.0}; static float znum[7] = { .1477, .8864, 2.216, 2.955, 2.216, .8864, .1477 }; static float zden[6] = { 2.183e-02, .2099, .8779, 2.055, 2.91, 2.38 }; if (setic==1){ for (i=0;i<=6;i++) delay[i] = .1058*initval; return initval; } else{ sumden=0.0; sumnum=0.0; for (i=0;i<=5;i++){ delay[i] = delay[i+1]; sumden += delay[i]*zden[i]; sumnum += delay[i]*znum[i]; } delay[6] = invar-sumden; sumnum += delay[6]*znum[6]; return sumnum; }}
matlab的没有,不过你可以将其C语言转换成Matlab的仿真一下!
求帮助编写一个六阶巴特沃斯低通滤波器,截止频率为35HZ,采样频率为100HZ,求matlab的此程序啊,
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