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M&M error plot

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zeefaad
2025-10-26 11:51:49 +01:00
parent 63f706eee5
commit ae04d5e2bd
5 changed files with 833 additions and 54 deletions
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21
QAM/qam.c
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@ -364,7 +364,7 @@ void pll(qam_system* qam, double complex* s_with_preamble, double complex* r_cor
}
// Synchro temporelle Müller et Müller
void muller_muller_sync(qam_system* qam, double complex* s_data, int nb_symbols, double Kp_mm, double Ki_mm, double complex* r_mm_out) {
void muller_muller_sync(qam_system* qam, double complex* s_data, int nb_symbols, double Kp_mm, double Ki_mm, double complex* r_mm_out, FILE* fp_error) {
double integrator = 0.0;
double timing_offset = 0.0;
double current_idx_double = 0.0;
@ -411,6 +411,11 @@ void muller_muller_sync(qam_system* qam, double complex* s_data, int nb_symbols,
current_idx_double += qam->N - timing_offset;
d_k_minus_1 = d_k;
if (fp_error) {
fprintf(fp_error, "%d % .8f\n", k, 5 * timing_offset);
fflush(fp_error);
}
}
}
@ -474,7 +479,7 @@ int main () {
init_constellation(&qam);
// Conversion du texte en bits
char* texte = "Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux";
char* texte = "Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux,Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux,Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux,Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux,Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux, Vif juge, trempez ce blond whisky aqueux,FIN";
int nb_chars = strlen(texte);
int nb_bits = nb_chars * 8;
int nb_symbols = (nb_bits + qam.k - 1) / qam.k;
@ -530,12 +535,14 @@ int main () {
fclose(fp_pll_error);
double complex* s_bande_base = malloc(sizeof(double complex) * nb_symbols * qam.N);
demodulate_carrier(&qam, s_corrected + L * qam.N, s_bande_base, total_samples);
demodulate_carrier(&qam, s_corrected + L * qam.N, s_bande_base, nb_symbols * qam.N);
double complex* r_mm_out = malloc(sizeof(double complex) * nb_bits);
double Kp_mm = 0.05;
double Ki_mm = 0.001;
muller_muller_sync(&qam, s_bande_base, nb_symbols, Kp_mm, Ki_mm, r_mm_out);
double complex* r_mm_out = malloc(sizeof(double complex) * nb_symbols);
double Kp_mm = 0.5;
double Ki_mm = 0.01;
FILE *fp_mm_error = fopen("mm_timing_error.dat", "w");
muller_muller_sync(&qam, s_bande_base, nb_symbols, Kp_mm, Ki_mm, r_mm_out, fp_mm_error);
fclose(fp_mm_error);
// Démodulation
FILE *fp_constel = fopen("constellation.dat", "w");