In order to achieve the ultimate fidelity in communications, the respective bandwidth sizes for channel, medium, and signal should be placed in what order?

To achieve the ultimate fidelity in communications, the order of bandwidth sizes is crucial. The correct sequence is to prioritize the signal first, followed by the channel, and finally the medium.

The signal represents the information being transmitted and requires the highest bandwidth to ensure that all details are accurately conveyed without distortion. When the signal has adequate bandwidth, it can carry the full range of frequencies necessary for clear communication, allowing for greater fidelity.

Next in importance is the channel, which is the path through which the signal travels. When the channel has sufficient bandwidth, it can accommodate the necessary data rates associated with the signal, minimizing the potential for interference and loss of information.

Lastly, the medium, which refers to the physical infrastructure (like wires, fiber optics, or wireless frequencies) supporting the transmission, should have the bandwidth necessary to carry the channel's signals effectively. While the medium is important, its bandwidth needs to be sufficient but is less critical than the signal and channel in maintaining overall fidelity.

This ordered approach ensures that each component supports the fidelity of the overall communication system effectively, maintaining integrity from the original signal through the channel and finally via the medium.