ber.txt ber1.txt bit_gen.m demap_soft.m fig_A.fig fig_B.fig GRAY_16QAM_CON.mat GRAY_64QAM_CON.mat GRAY_QPSK_CON.mat MAIN_OFDM.m mod_type_config.m noise_cmplex.m plot_figure1.m snrdB2sigma.m wenjian1.mat wenjian2.mat ZHAO_OFDM.m 2pskbersimulation.zip