Phase Shift Keying
Phase Shift Keying (PSK) is a digital modulation technique used in communication systems to transmit data over a carrier wave by changing the phase of the wave. In PSK, the phase of the carrier wave is varied in accordance with the digital data signal. The two most common forms of PSK are Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK). BPSK uses two phases, 0 and 180 degrees, to represent the two binary states, while QPSK uses four phases, 0, 90, 180, and 270 degrees, to represent two bits of data at a time. PSK is widely used in wireless communication systems, such as Wi-Fi, Bluetooth, and satellite communication systems.
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