这是一个关于在无线光通信中，实现PPM编码调制的程序。-This is a study on wireless optical communications, coded modulation to achieve PPM procedures.

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 constella