📄 sos_c.mht

📁 常用的DSP算法集锦

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Date: Wed, 27 Sep 2006 22:41:20 +0800
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<BODY><PRE>/* sos.c - IIR filtering by single second order section */

double sos(a, b, w, x)                    /* \(a, b, w\) are =
3-dimensional */
double *a, *b, *w, x;                     /* \(a[0]=3D1\) always */
{
       double y;

       w[0] =3D x - a[1] * w[1] - a[2] * w[2];
       y =3D b[0] * w[0] + b[1] * w[1] + b[2] * w[2];

       w[2] =3D w[1];
       w[1] =3D w[0];

       return y;
}
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