Try Our Apps


WATCH "Lumbersexual"

phase-shift keying

phase-shift keying in Technology

(PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes.
Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source

Word of the Day

Word Value for phase

Scrabble Words With Friends

Nearby words for phase-shift keying