testprog9.c

Test del Filtro Iir pasa alto, para dos señales sinusoidales en pi/32, 3*pi/4.

Autor

Fernando Pujaico Rivera

Fecha

10-02-2012
Ademas la señal de entrada tiene una constante igual 1. La frecuencia de muestro es 2*pi.
Test de un filtro IIR pasa alto de primer orden con polo en a=0.95.

Señal de entrada x[n].

Señal de salida y[n].

/*
 * testprog9.c
 * 
 * Copyright 2011 Fernando Pujaico Rivera <fernando.pujaico.rivera@gmail.com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 */


#include <config.h>
#include <stdlib.h>
#include <pds/pdsdf.h>
#include <pds/pdsvector.h>
#include "extras.h"
#include <math.h>

int main(int argc, char** argv)
{
        PdsIir1HP *IIR1HP=NULL;
        PdsDfReal x,y;
        PdsDfReal a=0.95;
        PdsDfNatural n,N;
        FILE *fd=NULL;
        char DATAFILE[]="datos.txt";
        char OCTAVEFILE[]="plotinoctave.m";
        PdsVector *X=NULL;
        PdsVector *Y1=NULL;
        PdsVector *Y2=NULL;

        N=128;
        X=pds_vector_new(N);
        Y1=pds_vector_new(N);
        Y2=pds_vector_new(N);
        
        IIR1HP=pds_iir1hp_new(a);
        for(n=0;n<N;n++)
        {
                x=1.0+sin(M_PI*n/32.0)+sin(3.0*M_PI*n/4.0+M_PI/16.0);
                pds_iir1hp_evaluate_value(IIR1HP,x,&y);

                X->V[n]=x;
                Y1->V[n]=y;
        }
        pds_iir1hp_free(IIR1HP);

        IIR1HP=pds_iir1hp_new(a);
        pds_iir1hp_evaluate_vector(IIR1HP,X,Y2);
        pds_iir1hp_free(IIR1HP);

        fd=fopen(DATAFILE,"w");
        if(fd==NULL)    return EXIT_FAILURE;
        pds_vector_fprintf(X,fd);
        pds_vector_fprintf(Y1,fd);
        pds_vector_fprintf(Y2,fd);
        fclose(fd);

        pds_octave_plot_lin(OCTAVEFILE,DATAFILE);

        return EXIT_SUCCESS;
}