The Origins of RF Signal Modulation

The Origins of RF Signal Modulation

Modulation of radio frequency signals originated in the early 20th century with the need to transmit information wirelessly over long distances. Amplitude modulation (AM) and frequency modulation (FM) were among the first techniques developed.

As technology advanced, new modulation schemes such as phase modulation (PM) and quadrature amplitude modulation (QAM) were introduced to improve data transmission efficiency and speed. Today, modulation is an essential part of all wireless communication systems.