differential phase

differential phase

[‚dif·ə′ren·chəl ′fāz]
(electronics)
Difference in output phase of a small high-frequency sine-wave signal at two stated levels of a low-frequency signal on which it is superimposed in a video transmission system.
References in periodicals archive ?
This research was performed in a 4-channel 40 Gbps WDM transmission system with binary differential phase shift keying (BDPSK) modulation.
For example, the following imaging techniques are currently supported: X-ray fluorescence (XRF), ptychography, diffraction, differential phase contrast and X-ray absorption spectroscopy.
Differential phase shift keying does not have determined symbols in constellation diagram as it is in common PSK, but it has a table of phase shifts (in degrees or radians) where is each phase shift represented with a symbol.
The higher spatial resolution allows studies of small-scale features, such as individual cumulonimbus clouds, gust front circulations, and microbursts, while the greater differential phase sensitivity should enhance the analysis of winter storm patterns, such as crystal growth; summer storm patterns, such as the identification of electrification morphology (Caylor and Chandrasekar 1996); and general rainfall estimation applications, especially for lighter rain rates.
On the other hand differential phase shift keying (DPSK) is a non-coherent kind of phase shift keying technique.
The proposed quadrature power divider consists of a two-section power divider in combination with a 90[degrees] [+ or -] 10[degrees] metamaterial differential phase shifter as is shown in Figure 1(a).
The performance is defined by its insertion loss, return loss, and the deviation of the differential phase shift.
In 2009, GlobeNet upgraded a segment of its network with Xtera's NXT 20 Gbps Differential Phase Shift Key (DPSK) technology.
Differential phase shift keying (DPSK) compares the phase of the present pulse with that of the previous one.
Xtera's contract with Global Crossing is to provide new capacity using the Xtera NXT next generation Submarine Line Terminal Equipment (SLTE) with 20 Gbit/s Differential Phase Shift Technology (DPSK).
Xtera said its NXT Submarine Line Terminal Equipment (SLTE) with advanced 20Gb/s Differential Phase Shift Keying (DPSK) technology has been selected for the Americas I North and Columbus 2b upgrade.
The 14 papers here describe such applications as evanescent field tapered fiber optic biosensor fabrication and applications in antibody detection and immobilization, Raman amplification for communication systems, Bragg gratings in high birefringence optical fibers, applications of hollow optical fibers in atom optics, physical modeling of ring lasers, optical power budgets, all-fiber devices for optical networks, optical differential phase shift keying, polymer optical fibers, dissipative solitons in polymer systems, pulses in averaged and dispersion-managed systems, gap solitons in hollow core photonic crystal fibers, multilength optical fiber lasers and semiconductor optical amplifier ring lasers, and the impact of aging on reliability in single-mode silica optical fibers.

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