A relay signal is essentially a signal that is transmitted from one point to another by an intermediary, or relay station. These relay stations amplify or repeat the signal, ensuring that it maintains its strength and integrity as it travels through different mediums, such as electrical wires, optical fibers, or even wireless channels. The concept of relaying is used in various communication systems, including satellite communication, mobile networks, and even the internet.

    In a typical communication scenario, a signal might lose strength over long distances, leading to a loss in data quality or connectivity. Relay signals help overcome this limitation by boosting the signal strength or redirecting it to the desired destination. Without relays, modern communication systems would be much less effective, especially over large geographical areas.