Dispersion

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Dispersion

In statistics, the placement of data points along a chart relative to an average or mean line. Dispersion is important to finance as the data points of say, a stock, determine the mean, which in turn helps determines the stock's trend. Dispersion is also used to determine volatility: data points all over the chart indicate that a stock has wild fluctuation in price.
References in periodicals archive ?
In this paper we compare the performance of Backpropagation and CMA electronic compensation techniques in a NG-PON with QPSK modulation format and coherent detection to compensate the chromatic dispersion in the optical fiber.
After filtering, we use a dispersion block that causes an expansion of the original signal in the time domain and moreover a phase shift is occurred due to the chromatic dispersion.
Dispersion compensation modules (DCM) (also called dispersion compensation units-DCU) can be used for chromatic dispersion compensation and system performance improvement in fiber optical transmission systems.
Since the boundary integral method takes into account all phase changes, it can also be used to calculate the chromatic dispersion based on Equation (14).
5 Gb/s, at which point the chirping spectrum coupled with chromatic dispersion of the fiber will limit performance.
In addition, the test demonstrated that the system could compensate automatically when adding chromatic dispersion and polarization mode dispersion to actual transmission circuits, which could happen over a variety of networks.
Fortenberry, Enhanced wavelength resolution chromatic dispersion measurements using fixed sideband technique, Optical Fiber Communication Conference OSA Technical Digest, Optical Society of America, Washington DC, 2000, TuG8, pp.
The N4391A offers measurement and compensation of the link's in-channel chromatic dispersion and first-order polarization mode dispersion by analyzing the received signals, granting engineers deep insight into the root cause of constellation distortions beyond 32 Gbaud.
Lot 1 - An instrument for measuring the resistance of transformer windings and analysis of labor regulation switch, Lot 2 - An instrument for measuring the transmission ratio of the transformer, Lot 3 - An instrument for measuring low resistance, Lot 4 - An instrument for measuring the return pad and chromatic dispersion in an optical fiber (optical reflectometer) and Lot 5 - a device for connecting optical fibers, all in accordance with the technical specifications set out in Annex 4 of the tender documents.
Important topics this year were dispersion measurements, both polarization dispersion and chromatic dispersion, and nonlinear optical measurements.
Civcom's 100G DP-QPSK is equipped with an advanced Digital Signal Processing (DSP) unit that eliminates the need for optical compensation in chromatic dispersion, and featuring the lowest power consumption in the optical market today.