Phase Modulation definition of Phase Modulation in the Free Online Encyclopedia.

phase modulation: see modulation modulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulating wave); demodulation is the process by which the original signal is recovered from
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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.

phase modulation [′fāz ‚mäj·ə‚lā·shən]

(communications)

Modulation in which the linearly increasing angle of a sine wave has added to it a phase angle that is proportional to the instantaneous value of the modulating signal (message to be communicated). Abbreviated PM.

Phase Modulation

a method of modulating oscillations in which the transmitted signal controls the phase of a high-frequency carrier. The characteristics of phase modulation are similar to those of frequency modulation. If the modulating signal is sinusoidal, the spectra and wave forms of phase-modulated and frequency-modulated signals coincide. Differences between the two methods become apparent if the modulating signal has a more complex wave form.

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No references found	Analog synthesis, frequency, phase modulation, and specifics on four popular music synthesizers and their unique techniques makes for a solid, powerful guide hard perfect for any electronic musician's reference library. Course Technology by The Bookwatch Analog synthesis, frequency, phase modulation, and specifics on four popular music synthesizers and their unique techniques makes for a solid, powerful guide hard perfect for any electronic musician's reference library. Course Technology by Internet Bookwatch The multi-level modulation using phase modulation or digital coherent detection is being introduced into 40Gbps and 100Gbps optical transmissions compared with traditional On-Off Keying (OOK), since these are not easily affected by signal distortion and noise caused by transmission fibers. Fujitsu Optical Components and Furukawa Electric to Jointly Develop ... by JCN Newswires	phase encoding phase equalizer phase equilibria Phase Equilibrium phase excursion phase factor Phase Fixation phase front phase function phase generator phase inequality phase integral phase integral method phase inversion Phase Inverter phase jitter phase lag phase lead phase localizer phase lock phase magnet phase margin phase matching phase meter phase modifier Phase Modulation phase modulator Phase of the Moon Phase Plane Analysis phase plate phase portrait phase problem phase quadrature phase ratio phase resonance phase response phase reversal phase reversal modulation Phase Rule phase shift Phase Shifter Phase Shifter, Microwave phase solubility Phase Space phase speed Phase Splitter phase stability Phase Stability in Particle Accelerators phase titration phase transfer catalysis phase transformation	Phase jitter Phase Jump Inhibiter Phase lag Phase lag (rotorcraft) phase lead Phase line Phase line Phase Linear Interferometer Experiment phase localizer Phase lock Phase Lock Demodulator Phase lock loop phase locked Phase locked loop Phase Locked Loop Control phase magnet Phase margin phase matching Phase Measurement System Phase meter Phase meter phase microscope phase microscope phase microscope phase microscope, phase-contrast microscope phase microscope, phase-contrast microscope phase microscope, phase-contrast microscope phase modifier Phase modulated Phase modulated Phase Modulation Phase Modulation On Pulse Phase Modulation-Demodulation Phase Modulation/Frequency Modulation Phase modulator Phase modulator Phase noise Phase Noise Analysis Phase Noise Analysis Tool Phase Noise Correction Phase Noise Measurement Module Phase Noise Suppression Phase of Arrival phase of cell division Phase of Education phase of maximum slope phase of the moon phase of the moon phase of the moon Phase of vibration Phase Offset Estimation Error Variance Phase One Phase One Consulting Group Phase One Digital Artist Series Phase One Engineering Team Phase One Engineering Technology Phase One Enviornmental Site Assessment Phase One Environmental Site Assessment

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Analog synthesis, frequency, phase modulation, and specifics on four popular music synthesizers and their unique techniques makes for a solid, powerful guide hard perfect for any electronic musician's reference library.

Course Technology by The Bookwatch

Course Technology by Internet Bookwatch

The multi-level modulation using phase modulation or digital coherent detection is being introduced into 40Gbps and 100Gbps optical transmissions compared with traditional On-Off Keying (OOK), since these are not easily affected by signal distortion and noise caused by transmission fibers.

Fujitsu Optical Components and Furukawa Electric to Jointly Develop ... by JCN Newswires

Phase jitter
Phase Jump Inhibiter
Phase lag
Phase lag (rotorcraft)
phase lead
Phase line
Phase line
Phase Linear Interferometer Experiment
phase localizer
Phase lock
Phase Lock Demodulator
Phase lock loop
phase locked
Phase locked loop
Phase Locked Loop Control
phase magnet
Phase margin
phase matching
Phase Measurement System
Phase meter
Phase meter
phase microscope
phase microscope
phase microscope
phase microscope, phase-contrast microscope
phase microscope, phase-contrast microscope
phase microscope, phase-contrast microscope
phase modifier
Phase modulated
Phase modulated

Phase Modulation

Phase Modulation On Pulse
Phase Modulation-Demodulation
Phase Modulation/Frequency Modulation
Phase modulator
Phase modulator
Phase noise
Phase Noise Analysis
Phase Noise Analysis Tool
Phase Noise Correction
Phase Noise Measurement Module
Phase Noise Suppression
Phase of Arrival
phase of cell division
Phase of Education
phase of maximum slope
phase of the moon
phase of the moon
phase of the moon
Phase of vibration
Phase Offset Estimation Error Variance
Phase One
Phase One Consulting Group
Phase One Digital Artist Series
Phase One Engineering Team
Phase One Engineering Technology
Phase One Enviornmental Site Assessment
Phase One Environmental Site Assessment