Phase-shift keying (PSK) is a digital modulation technique used in telecommunications and data transmission. It is a method of conveying information by varying the phase of a signal in relation to a reference signal. In PSK, the phase shift of the carrier signal is changed to represent different symbols or bits.
PSK is commonly used for transmitting digital data over radio waves, optical fibers, and other communication channels. It allows the encoding of multiple bits per symbol, enabling higher data rates and more efficient use of the available bandwidth.
There are different variations of PSK, including binary-phase shift keying (BPSK) and quadrature phase shift keying (QPSK). BPSK is the simplest form, where each symbol represents one bit of information. QPSK, on the other hand, allows two bits per symbol, by using four different phase shifts.
PSK is particularly effective in noisy environments as it provides good resistance to interference and fading. Error detection and correction techniques can be employed to enhance the reliability of the transmitted data.
Overall, PSK is a modulation technique that enables the transmission of digital data by varying the phase of a carrier signal. Its versatility, adaptability to different channel conditions, and efficient utilization of bandwidth make it an essential tool for reliable and high-speed communication systems.
