Linear modulation

Linear modulation is a method used in communication systems to transmit information by varying a specific property of a high-frequency carrier wave, such as its amplitude, frequency, or phase, directly proportional to the original signal. This means the changes in the carrier reflect the shape of the message (like audio or data). It's called "linear" because the relationship between the message signal and the modulated carrier is proportional and direct, making the process predictable and straightforward. Common examples include amplitude modulation (AM) and frequency modulation (FM), both used in radio broadcasting.