实现QPSK调制，映射成星座图上对应的复数点；将星座图上的复数点作QPSK解调。
16和64位QAM调制。(The QPSK modulation is mapped into the corresponding complex points on the constellation diagram, and the complex points on the constellation diagram are demodulated by QPSK.
16 bit and 64 bit QAM modulation.)