kopia lustrzana https://github.com/Dsplib/libdspl-2.0
added example for cheby_zp and ellip_zp
Sergey Bakhurin
rodzic
a557330fe6
commit
d2dd42dea8
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@ -28,7 +28,7 @@ int main(int argc, char* argv[])
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/* print H(s) zeros values */
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printf("Butterworth filter zeros: %d\n", nz);
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for(k = 0; k < nz; k++)
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printf("z[%2d] = %9.3f %+9.3f j\n", k, RE(z[k]), IM(p[k]));
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printf("z[%2d] = %9.3f %+9.3f j\n", k, RE(z[k]), IM(z[k]));
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/* print H(s) poles values */
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printf("Butterworth filter poles: %d\n", np);
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@ -0,0 +1,59 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dspl.h"
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/* Filter order */
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#define ORD 7
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int main(int argc, char* argv[])
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{
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void* hdspl; /* DSPL handle */
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void* hplot; /* GNUPLOT handle */
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/* Load DSPL functions */
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hdspl = dspl_load();
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complex_t z[ORD+1]; /* H(s) zeros vector */
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complex_t p[ORD+1]; /* H(s) poles vector */
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double Rp = 0.5; /* Magnitude ripple from 0 to 1 rad/s */
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int res, k, nz, np;
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/* Zeros and poles vectors calculation */
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res = cheby1_ap_zp(ORD, Rp, z, &nz, p, &np);
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if(res != RES_OK)
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printf("error code = 0x%8x\n", res);
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/* print H(s) zeros values */
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printf("Chebyshev type 1 filter zeros: %d\n", nz);
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for(k = 0; k < nz; k++)
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printf("z[%2d] = %9.3f %+9.3f j\n", k, RE(z[k]), IM(z[k]));
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/* print H(s) poles values */
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printf("Chebyshev type 1 filter poles: %d\n", np);
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for(k = 0; k < np; k++)
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printf("p[%2d] = %9.3f %+9.3f j\n", k, RE(p[k]), IM(p[k]));
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/* Write complex poles to the file */
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writetxt_cmplx(p, ORD, "dat/cheby1_ap_zp.txt");
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/* plotting by GNUPLOT */
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gnuplot_create(argc, argv, 440, 360, "img/cheby1_ap_zp_test.png", &hplot);
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gnuplot_cmd(hplot, "unset key");
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gnuplot_cmd(hplot, "set xzeroaxis");
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gnuplot_cmd(hplot, "set yzeroaxis");
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gnuplot_cmd(hplot, "set xlabel 'sigma'");
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gnuplot_cmd(hplot, "set ylabel 'jw'");
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gnuplot_cmd(hplot, "set size square");
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gnuplot_cmd(hplot, "set xrange [-1.5:1.5]");
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gnuplot_cmd(hplot, "set yrange [-1.5:1.5]");
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gnuplot_cmd(hplot, "plot 'dat/cheby1_ap_zp.txt' with points pt 2");
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gnuplot_close(hplot);
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/* free dspl handle */
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dspl_free(hdspl);
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return res;
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}
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@ -1,32 +1,60 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dspl.h"
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#define ORD 7
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/* Filter order */
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#define ORD 7
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int main()
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int main(int argc, char* argv[])
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{
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void* handle; /* DSPL handle */
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handle = dspl_load(); /* Load DSPL functions */
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void* hdspl; /* DSPL handle */
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void* hplot; /* GNUPLOT handle */
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/* Load DSPL functions */
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hdspl = dspl_load();
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complex_t z[ORD], p[ORD];
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int nz, np, k;
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double Rs = 40.0;
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int res = cheby2_ap_zp(ORD, Rs, z, &nz, p, &np);
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if(res != RES_OK)
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printf("error code = 0x%8x\n", res);
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printf("\nChebyshev type 2 zeros:\n");
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for(k = 0; k < nz; k++)
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printf("z[%2d] = %9.3f %9.3f j\n", k, RE(z[k]), IM(z[k]));
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complex_t z[ORD+1]; /* H(s) zeros vector */
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complex_t p[ORD+1]; /* H(s) poles vector */
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double Rs = 40; /* Stopband suppression, dB */
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printf("\nChebyshev type 2 poles:\n");
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for(k = 0; k < np; k++)
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printf("p[%2d] = %9.3f %9.3f j\n", k, RE(p[k]), IM(p[k]));
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int res, k, nz, np;
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dspl_free(handle); /* free dspl handle */
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return 0;
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/* Zeros and poles vectors calculation */
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res = cheby2_ap_zp(ORD, Rs, z, &nz, p, &np);
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if(res != RES_OK)
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printf("error code = 0x%8x\n", res);
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/* print H(s) zeros values */
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printf("Chebyshev type 2 filter zeros: %d\n", nz);
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for(k = 0; k < nz; k++)
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printf("z[%2d] = %9.3f %+9.3f j\n", k, RE(z[k]), IM(z[k]));
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/* print H(s) poles values */
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printf("Chebyshev type 2 filter poles: %d\n", np);
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for(k = 0; k < np; k++)
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printf("p[%2d] = %9.3f %+9.3f j\n", k, RE(p[k]), IM(p[k]));
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/* Write complex poles to the file */
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writetxt_cmplx(z, nz, "dat/cheby2_ap_z.txt");
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writetxt_cmplx(p, np, "dat/cheby2_ap_p.txt");
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/* plotting by GNUPLOT */
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gnuplot_create(argc, argv, 440, 360, "img/cheby2_ap_zp_test.png", &hplot);
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gnuplot_cmd(hplot, "unset key");
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gnuplot_cmd(hplot, "set xzeroaxis");
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gnuplot_cmd(hplot, "set yzeroaxis");
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gnuplot_cmd(hplot, "set xlabel 'sigma'");
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gnuplot_cmd(hplot, "set ylabel 'jw'");
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gnuplot_cmd(hplot, "set size square");
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gnuplot_cmd(hplot, "set xrange [-3:3]");
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gnuplot_cmd(hplot, "set yrange [-3:3]");
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gnuplot_cmd(hplot, "plot 'dat/cheby2_ap_p.txt' with points pt 2, \\");
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gnuplot_cmd(hplot, " 'dat/cheby2_ap_z.txt' with points pt 6");
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gnuplot_close(hplot);
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/* free dspl handle */
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dspl_free(hdspl);
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return res;
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}
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@ -0,0 +1,62 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dspl.h"
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/* Filter order */
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#define ORD 7
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int main(int argc, char* argv[])
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{
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void* hdspl; /* DSPL handle */
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void* hplot; /* GNUPLOT handle */
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/* Load DSPL functions */
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hdspl = dspl_load();
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complex_t z[ORD+1]; /* H(s) zeros vector */
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complex_t p[ORD+1]; /* H(s) poles vector */
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double Rp = 1.0; /* Magnitude ripple from 0 to 1 rad/s */
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double Rs = 40; /* Stopband suppression, dB */
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int res, k, nz, np;
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/* Zeros and poles vectors calculation */
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res = ellip_ap_zp(ORD, Rp, Rs, z, &nz, p, &np);
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if(res != RES_OK)
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printf("error code = 0x%8x\n", res);
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/* print H(s) zeros values */
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printf("Elliptic filter zeros: %d\n", nz);
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for(k = 0; k < nz; k++)
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printf("z[%2d] = %9.3f %+9.3f j\n", k, RE(z[k]), IM(z[k]));
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/* print H(s) poles values */
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printf("Elliptic filter poles: %d\n", np);
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for(k = 0; k < np; k++)
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printf("p[%2d] = %9.3f %+9.3f j\n", k, RE(p[k]), IM(p[k]));
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/* Write complex poles to the file */
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writetxt_cmplx(z, nz, "dat/ellip_ap_z.txt");
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writetxt_cmplx(p, np, "dat/ellip_ap_p.txt");
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/* plotting by GNUPLOT */
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gnuplot_create(argc, argv, 440, 360, "img/ellip_ap_zp_test.png", &hplot);
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gnuplot_cmd(hplot, "unset key");
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gnuplot_cmd(hplot, "set xzeroaxis");
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gnuplot_cmd(hplot, "set yzeroaxis");
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gnuplot_cmd(hplot, "set xlabel 'sigma'");
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gnuplot_cmd(hplot, "set ylabel 'jw'");
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gnuplot_cmd(hplot, "set size square");
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gnuplot_cmd(hplot, "set xrange [-2:2]");
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gnuplot_cmd(hplot, "set yrange [-2:2]");
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gnuplot_cmd(hplot, "plot 'dat/ellip_ap_p.txt' with points pt 2, \\");
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gnuplot_cmd(hplot, " 'dat/ellip_ap_z.txt' with points pt 6");
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gnuplot_close(hplot);
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/* free dspl handle */
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dspl_free(hdspl);
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return res;
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}
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