exp4a.c

来自「(Ebook-Pdf) Dsp - Real Time Digital Sign」· C语言 代码 · 共 20 行

/* Experiment 4A - exp4a.c */
#include "input.dat"
#define  N 128
extern void dft_128(int *, int *);
extern void mag_128(int *, int *);
int Xin[2*N];
int Xout[2*N];
int Spectrum[N];
void main()
{
    int i,j;
    for (j=0,i=0;i<N;i++)
    {
        Xin[j++] = input[i];    /* Get real sample */
        Xin[j++] = 0;           /* Imaginary sample=0 */
    }
    dft_128(Xin, Xout);	        /* DFT routine */
    mag_128(Xout, Spectrum);    /* Compute spectrum */
}