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#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>
#include "liquid.h"
int main()
{
// create mod/demod objects
modulation_scheme ms = LIQUID_MODEM_QAM16;
// create the modem objects
modemcf mod = modemcf_create(ms);
modemcf demod = modemcf_create(ms);
// ensure bits/symbol matches modem description (only
// applicable to certain specific modems)
unsigned int bps = modemcf_get_bps(mod);
modemcf_print(mod);
unsigned int i; // modulated symbol
unsigned int s; // demodulated symbol
unsigned int num_symbols = 1<<bps;
float complex x;
unsigned int num_sym_errors = 0;
unsigned int num_bit_errors = 0;
for (i=0; i<num_symbols; i++) {
modemcf_modulate(mod, i, &x);
modemcf_demodulate(demod, x, &s);
printf("%4u : %12.8f + j*%12.8f\n", i, crealf(x), cimagf(x));
num_sym_errors += i == s ? 0 : 1;
num_bit_errors += count_bit_errors(i,s);
}
printf("num sym errors: %4u / %4u\n", num_sym_errors, num_symbols);
printf("num bit errors: %4u / %4u\n", num_bit_errors, num_symbols*bps);
modemcf_destroy(mod);
modemcf_destroy(demod);
return 0;
}
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