here is all the code in matlab for the modulation and demodulation in FM and PM where the input is the voice and show step by step the process in the modulation

labveiw实现基带信号的幅度调制（AM），频率调制(FM)和相位调制(PM)，可以在波形图中看到调制信号和调制后信号的叠加和对比，可以看到频域波形。载波与基带幅度和频率参数均可改变。-Baseband AM/FM/PM in labview. In the vi, you ll be able to see the modulated signal in both time and frequency domain.