中文说明：
基于matlab的QPSK实现，包含高斯信道和理想信道的调制、解调、星座图、功率谱以及误码率，有详细注释，很值得参考，绝对可以用。
English Description：
QPSK implementation based on MATLAB, including Gaussian channel and ideal channel modulation, demodulation, constellation, power spectrum and bit error rate, detailed notes, it is worth reference, absolutely can be used.