Theoretical ber computation

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In this example, we compare the bit error rates of different waveforms, as a function of the normalized SNR (Eb/N0).

Figure exemple_ber_theo()
{
  soit n = 16;

  soit ebn0       = linspace(-10, 20, n),
       ber_bpsk   = forme_onde_psk(2)->ber(ebn0),
       ber_qpsk   = forme_onde_psk(4)->ber(ebn0),
       ber_8psk   = forme_onde_psk(8)->ber(ebn0),
       ber_qam16  = forme_onde_qam(16)->ber(ebn0),
       ber_qam64  = forme_onde_qam(64)->ber(ebn0),
       ber_fsk    = forme_onde_fsk(2, 0.5)->ber(ebn0);

  Figure f;

  f.titres(est_fr() ? "BER théoriques" : "Theoretical BER", "Eb/N0");

  f.plot(ebn0, ber_bpsk,  "b-o", "BPSK");
  f.plot(ebn0, ber_qpsk,  "g-",  "QPSK");
  f.plot(ebn0, ber_8psk,  "c-s", "8PSK");
  f.plot(ebn0, ber_fsk,   "k-o", "FSK");
  f.plot(ebn0, ber_qam16, "r-o", "QAM16");
  f.plot(ebn0, ber_qam64, "m-s", "QAM64");


  f.axes().def_echelle("lin", "log");
  f.def_rdi({-10, 1e-9, 30, 1});

  retourne f;
}