📄 cas_c.mht

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<BODY><PRE>/* cas.c - IIR filtering in cascade of second-order sections =
*/

double sos();                                    /* single second-order =
section */

double cas(K, A, B, W, x)
int K;
double **A, **B, **W, x;                         /* \(A,B,W\) are =
\(Kx3\) matrices */
{
       int i;
       double y;

       y =3D x;                                    /* initial input to =
first SOS */

       for (i=3D0; i&lt;K; i++)
              y =3D sos(A[i], B[i], W[i], y);      /* output of \(i\)th =
section */

       return y;                                 /* final output from =
last SOS */
}
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