Phase Modulation

Phase Modulation (PM) is a technique used in communications where the phase of a signal is varied to convey information. Instead of changing the amplitude or frequency, PM alters the point in time when a wave’s peak occurs. This change in phase represents different data values, allowing for effective transmission of information over mediums like radio waves. PM is often used in digital communication systems and helps improve the signal's resilience to noise, making it a key method in technologies such as mobile phones and satellite communications.