📄 can2_c.mht

📁 常用的DSP算法集锦

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Date: Wed, 27 Sep 2006 22:36:38 +0800
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<BODY><PRE>/* can2.c - IIR filtering in canonical form */

double dot();
void delay();

double can2(M, a, L, b, w, x)             /* usage: y =3D can2(M, a, L, =
b, w, x); */
double *a, *b, *w, x;
int M, L;
{
       int K;
       double y;

       K =3D (L &lt;=3D M) ? M : L;                     /* =
\(K=3D\max(M,L)\) */

       w[0] =3D 0;                                 /* needed for =
dot(M,a,w) */

       w[0] =3D x - dot(M, a, w);                  /* input adder */

       y =3D dot(L, b, w);                         /* output adder */

       delay(K, w);                              /* update delay line */

       return y;                                 /* current output =
sample */
}
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