二进制相移键控信号时域波形，频域功率谱密度，以及加入加性高斯白噪声后输出的信噪比与误码率的关系。-Binary Phase Shift Keying signal time-domain waveform, frequency domain power spectral density, and the relationship between AWGN to a dispersion after the output signal to noise ratio and bit error rate.