Frequency division multiplexing

1. What is meant by frequency-division multiplexing?
2. What is the basic principle of FDM?
3. Why is FDM used?
4. What is the main difference between FDM and TDM?

What is meant by frequency-division multiplexing?

What is frequency-division multiplexing (FDM)? In frequency-division multiplexing (FDM), multiple signals are combined for transmission on a single communications line or channel, with each signal assigned to a different frequency (subchannel) within the main channel.

What is the basic principle of FDM?

FDM works on the principle of heating the material which is generally in the form of a thermoplastic filament or metallic wire to its melting point and then to extrude it layer by layer to manufacture a 3D part [49]. This ALM process was developed by S. Scott Crump (cofounder and chairman of Stratasys Inc.)

Why is FDM used?

FDM models reduce costs and shorten development timelines; The creation of functional prototypes for testing purposes. These prototypes allow to test in real world environments and make decisions that have a dramatic effect on the cost to manufacture to the product; Fabrication of end-use parts.

What is the main difference between FDM and TDM?

Definition: TDM is a process of transmitting multiple data streams over a single channel. Where each signal is divided into a fixed-length time slot. Whereas FDM is a process in which the total available bandwidth is divided into a series of non-overlapping frequency bands where each band carries a separate signal.