What does "FDM" stand for in radio communication?

In radio communication, "FDM" stands for Frequency Division Multiplexing. This is a technique that allows multiple signals to be transmitted simultaneously over a single communication channel by assigning a different frequency band to each signal. Each signal is modulated onto a distinct carrier frequency, and these carriers are separated by a specific frequency interval, ensuring that they do not interfere with one another.

FDM is widely used in various forms of communication, including radio and television broadcasting, where multiple channels can coexist within the same bandwidth. By utilizing different frequency bands for each channel, FDM maximizes the use of available bandwidth and increases the capacity of the communication system.

The other options do not accurately define FDM in the context of radio communication, which helps clarify why they are not the correct answer. Frequency Dedicated Modulation might imply some method of modulation linked to specific frequencies, but it does not capture the multiplexing aspect. Fast Data Multiplexing suggests a quick method of combining data streams, while Filtered Data Management relates more to data organization rather than its transmission via multiplexing.