Phase Modulation (PM)

Phase modulation (PM) is a technique in communication where the timing or phase of a carrier wave is varied in proportion to the information signal, such as sound or data. Essentially, the wave's position in its cycle shifts to encode information, allowing the signal to carry data over distances. This method is common in radio, television, and satellite transmissions because it provides good noise immunity and efficient data transfer. In simple terms, PM tweaks the wave's timing pattern to encode messages without changing its strength or frequency, enabling reliable and clear communication.