What is frequency hopping in communication?

Frequency hopping is a method used in wireless communications where both the transmitter and receiver synchronize to change frequencies in a predetermined pattern or sequence. This technique allows for the transmission of data over multiple frequencies, making it more resistant to interference and eavesdropping. Because both the transmitter and receiver are aware of the frequency schedule, they can effectively communicate without the disruption that might occur if a single frequency were used continuously.

This synchronization is crucial as it ensures that both parties are on the same frequency at the same time, allowing for clear communication. The method effectively mitigates issues such as fading and interference that can affect transmission quality, making it a robust choice for ensuring reliable communication in a variety of environments.

The other options, while they touch on related concepts, do not accurately represent the essence of frequency hopping. For example, changing frequencies at random without synchronization would lead to communication failures, while merely increasing power or reducing interference doesn't encapsulate the core principle of synchronized frequency changes integral to frequency hopping technology.