Phase Shift Keying

Phase Shift Keying (PSK) is a digital modulation technique used in communications to transmit data by changing the phase of a carrier wave. Imagine a wave as a circle; shifting its starting point (phase) encodes information. Each phase shift represents different bits (binary data). For example, in a common form called Binary PSK (BPSK), two phases represent 0 and 1. PSK efficiently transmits data over radio, fiber, or wireless channels by encoding information into the wave’s phase changes, making it a reliable method for digital communication with good resistance to noise.