Digital modulation methods can be considered as digital-to-analog conversion, and the corresponding demodulation or detection as analog-to-digital conversion. The changes in the carrier signal are chosen a finite number of M alternative symbols (the modulation alphabet).

Digital modulation\dem_PSK_or_QAM.m
..................\demodulate_PSK_or_QAM.m
..................\detector_FSK.m
..................\detector_MSK.m
..................\detector_PSK.m
..................\do_QAM_sim.m
..................\mod_PSK_or_QAM.m
..................\modulate_PSK_or_QAM.m
..................\Q.m
..................\QAM.m
..................\QAM_dem.m
..................\QAM4_slicer.m
..................\sim_DSB_AMSC.m
..................\sim_DSB_AMTC.m
..................\sim_FM.m
..................\sim_FSK_bandpass_coherent.m
..................\sim_FSK_bandpass_noncoherent.m
..................\sim_MSK.m
..................\sim_OQPSK.m
..................\sim_orthogonal.m
..................\sim_PSK_passband.m
..................\sim_QAM_carrier_recovery.m
..................\sim_QAM_passband.m
..................\sim_QPSK_Costas.m
..................\sim_QPSK_Costas_earlylate.m
..................\sim_S_QDPSK.m

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