数字通信系统仿真\rise_cos.m ................\insert_value.m ................\stem_2way.m ................\modulate_to_high.m ................\generate_noise.m ................\pick_sig.m ................\plot_2way.m ................\insert.m ................\plot_astrology.m ................\demodulate_sig.m ................\plot_snr.m ................\Qam_modulation.m ................\project.m 数字通信系统仿真