中文说明：本程序能够通过产生随机序列，串并转换，电平转换，以及相位映射等实现16qam的调制与解调，最终生成调制波形图，星座图等。
English Description：
This program can generate random sequences, strings and convert and level shifting and phase maps of 16qam modulation and demodulation, and ultimately generate a modulated waveform graph, constellation, and so on.