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//
//
//
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "liquid.h"
#define OUTPUT_FILENAME "ofdmframegen_example.m"
int main() {
// options
unsigned int num_subcarriers=64;//
unsigned int cp_len=16; // cyclic prefix length
//unsigned int num_symbols=2; // number of ofdm symbols
//
unsigned int frame_len = num_subcarriers + cp_len;
//unsigned int num_samples = num_subcarriers * num_frames;
// create synthesizer/analyzer objects
ofdmframegen fg = ofdmframegen_create(num_subcarriers, cp_len);
ofdmframegen_print(fg);
FILE*fid = fopen(OUTPUT_FILENAME,"w");
fprintf(fid,"%% %s: auto-generated file\n\n", OUTPUT_FILENAME);
fprintf(fid,"clear all;\nclose all;\n\n");
fprintf(fid,"num_subcarriers=%u;\n", num_subcarriers);
fprintf(fid,"cp_len=%u;\n", cp_len);
fprintf(fid,"frame_len=%u;\n", frame_len);
fprintf(fid,"X = zeros(1,num_subcarriers);\n");
fprintf(fid,"x = zeros(1,frame_len);\n");
unsigned int i;
float complex X[num_subcarriers]; // channelized symbols
float complex x[frame_len]; // time-domain samples
for (i=0; i<num_subcarriers; i++) {
X[i] = i==4 ? 0.707f + _Complex_I*0.707f : 0.0f;
}
ofdmframegen_execute(fg,X,x);
//
for (i=0; i<num_subcarriers; i++)
fprintf(fid,"X(%3u) = %12.4e + j*%12.4e;\n", i+1, crealf(X[i]), cimagf(X[i]));
//
for (i=0; i<frame_len; i++)
fprintf(fid,"x(%3u) = %12.4e + j*%12.4e;\n", i+1, crealf(x[i]), cimagf(x[i]));
// print results
fprintf(fid,"\n\n");
fprintf(fid,"figure;\n");
fprintf(fid,"t=0:(frame_len-1);\n");
fprintf(fid,"plot(t,real(x),t,imag(x));\n");
fclose(fid);
printf("results written to %s\n", OUTPUT_FILENAME);
// destroy objects
ofdmframegen_destroy(fg);
printf("done.\n");
return 0;
}
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