In digital communication, what is modulation?

Modulation in digital communication refers to the process of varying one or more properties of a carrier signal, typically its frequency, amplitude, or phase, in accordance with the information signal, which can represent data. The purpose of modulation is to transmit data over a communication medium more effectively, allowing it to cover long distances and minimizing interference.

By adjusting the frequency of the carrier signal to correspond with the data being sent, modulation enables the efficient transmission of digital information. This technique allows signals to be sent over various mediums, including radio waves, coaxial cables, and fiber optics, making it fundamental to modern telecommunications.

The incorrect responses focus on aspects that do not relate directly to modulation. Ensuring accurate data storage, high-frequency data transfer, and processing voice recognition data involve different processes and techniques within the realm of digital communication and data handling, but none pertain specifically to the modulation process itself.