phase-shift keying


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Related to phase-shift keying: BPSK

phase-shift keying

[′fāz ¦shift ‚kē·iŋ]
(communications)
A form of phase modulation in which the modulating function shifts the instantaneous phase of the modulated wave between predetermined discrete values. Abbreviated PSK.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

phase modulation

Varying the angle of a wave in a carrier in order to transmit analog or digital data. For digital signals, phase modulation (PM) is widely used in conjunction with amplitude modulation (AM). For example, quadrature amplitude modulation (QAM) uses both phase and amplitude modulation to create different binary states for transmission (see QAM). See modulation and carrier.


Vary the Angle
In PM modulation, the angle of the carrier wave is varied by the incoming signal. In this example, the modulating wave implies an analog signal.







Digital Phase Shift Keying (PSK)
For digital signals, phase shift keying (PSK) uses two phases for 0 and 1 as in this example. See DPSK.
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References in periodicals archive ?
Huang, "Reconfigurable all-optical logic gates for multi-input differential phase-shift keying signals: design and experiments," Journal of Lightwave Technology, vol.
[6.] Chris Xu, Xiang Liu, Xing Wei Differential Phase-Shift Keying for High Spectral Efficiency Optical Transmissions// IEEE Journal of Selected Topics in Quantum Electronics, 2004.--Vol.
The ST400QF series airborne synthesized patented FEHLER quadrature phase-shift keying (QPSK) telemetry transmitter doubles the information bandwidth (when compared to conventional PCM-FM) while utilizing class C power amplifiers, which maintain the power efficiency associated with standard FM transmitters.
This article offers closed-form expressions for FOBP for classical binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK) (including offset QPSK (OQPSK)) and minimum-shift keying (MSK) modulation.
The later presentation of the quadrature phase-shift keying (QPSK) modulator output signal implies that any complex modulation can be generated using properly chosen amplitudes and phases of the I and Q signals.
A solid-state high power amplifier (HPA) amplifies an offset quadrature phase-shift keying signal on the uplink, and a traveling-wave-tube amplifier (TWTA) provides the gain for the downlink.
Using a conservative quadrature phase-shift keying modulation scheme, roughly 1 Gbps of digital data can be transmitted within 1 GHz of wireless spectrum.
Depending on the applications, various modulation schemes are being implemented from quadrature phase-shift keying (QPSK) to 64 quadrature amplitude modulation (QAM).
The industry continues to embrace linear modulation techniques such as quadrature phase-shift keying (QPSK), 64-state QAM (64QAM) and multicarrier configurations.
Complex modulation formats such as binary phase-shift keying, quadrature phase-shift keying and 64 quadrature amplitude modulation required for testing RF digital communications systems may be accomplished by driving the I/Q inputs with analog signals.
Simple modulators for schemes such as amplitude-shift keying (ASK), binary phase-shift keying (BPSK) and frequency-shift keying (FSK) can be designed using a wide range of techniques.

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