Modulate is a function written in matlab which creates a signal constellation with M points. The modulation schemes supported are BPSK , QPSK , PSK , QAM , APSK , HEX , or FSK -Modulate is a function written in matlab which creates a signal constellation with M points. The modulation schemes supported are　BPSK ,　QPSK ,　PSK ,　QAM ,　APSK ,　HEX , or　FSK