FDM stands for Frequency Division Multiplexing, which is a technique used in telecommunications and data communication systems. It is a method of transmitting multiple separate signals over a single communication channel by dividing the channel's frequency spectrum.
In FDM, the available frequency range is divided into multiple non-overlapping subchannels, each allocated to a different user or signal. Each subchannel is assigned a unique frequency band, allowing multiple signals to coexist and be simultaneously transmitted over the same physical channel.
This technique is particularly useful in situations where there is a limited amount of bandwidth available. By dividing the frequency spectrum into multiple subchannels, FDM allows for efficient utilization of the available bandwidth.
At the transmitting end, FDM combines different signals by modulating them onto carrier waves of different frequencies. These modulated carriers are then combined and transmitted together over the communication medium. At the receiving end, the signals are separated and demodulated from their respective carrier waves, enabling their retrieval in their original form.
FDM is commonly used in various communication systems, including telephony, broadcast radio, television, and satellite communication. It provides a cost-effective and efficient solution for transmitting multiple signals over a shared communication channel, allowing for increased data capacity and improved communication reliability.
