中文说明：介绍了在AWGN信道下开发QPSK调制的matlab代码已经用过了各种Eb/No值用于绘制误码率。错误概率根据相应的位错误计算价格。价格眼图还绘制了调音。FFT码也用于信号处理
English Description：
The matlab code for developing QPSK modulation in the case of AWGN channel is used.The various Eb/No values are used to plot the bit error rate. The Probability of error is calculated from the respective bit error rates.The eye diagram also plotted for the moodulation. The FFT codes are also used for signal proceesing