some zeros filters
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@ -94,16 +94,39 @@ main () {
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}
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// simple lag filter
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// xz[0] = 0.125;
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// yp[0] = 1.0;
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// yp[1] = -0.875;
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//
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//
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//simple 7/8th lag filter squared
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xz[0] = (0.125*0.125);
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xz[0] = 0.125;
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yp[0] = 1.0;
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yp[1] = -(2.0*0.875);
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yp[2] = (0.875*0.875);
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yp[1] = -0.875;
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// simple 7/8th lag filter squared
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//
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// xz[0] = (0.125*0.125);
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// yp[0] = 1.0;
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// yp[1] = -(2.0*0.875);
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// yp[2] = (0.875*0.875);
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// simple bandpass
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// (Z-1)(Z+1) = Z^2-1
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// xz[0] = 1.0;
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// xz[1] = 0.0;
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// xz[2] = -1.0;
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// yp[0] = 1.0;
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// peaky x4 bandpass, no d.c. no high freq near nyquist.
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// (Z^2-1)^2
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//
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// xz[0] = 1.0;
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// xz[1] = 0.0;
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// xz[2] = -2.0;
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// xz[3] = 0.0;
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// xz[4] = 1.0;
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// yp[0] = 1.0;
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// yp[1] = 0.0;
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// yp[2] = 0.0;
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//
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for (i=0;i<NYQUIST;i++) {
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