FM Full Form is Frequency Modulation. It is used for various radio communications. FM refers to the method of data impression on AC wave or alternating current wave. This is done by varying or modulating the wave’s instant frequency. This can be applied for digital or analog data. When FM is broadcast on VHF or very high frequency bands, it can offer exceptionally good audio quality. FM is most often used for 2-way radio communication purposes.
FM is exclusively used for communications of mobile radio in various transport systems. In spite of several digital transmissions emerging with advancement of technology, FM is still being the most common modulation. However, whenever information is carried by a FM signal, to extract the information, it has to be demodulated. There are defined processes through which demodulation is done.