双极性不归零码、双极性归零码和差分码的时域及功率谱密度图的绘制-bipolar not NRZ, bipolar NRZ and difference time-domain code and power spectral density Map

在MATLAB下实现FSK调制解调。并画出了每一步的波形以及功率谱密度图-in MATLAB under FSK modulation and demodulation. And the mapping out of every step of the waveform and power spectral density map