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Intrachannel nonlinearity is considered as a major distortion in high capacity transmission systems. To better understand the nonlinear distortion, the nonlinearity modeling is an essential technology. Most of current nonlinear models focus on the statistical characteristics of nonlinear noise. In this paper, we investigate the analytical models that predict the time-varying nonlinear noise waveform...
Intra-channel nonlinear noise waveform is predicted by novel nonlinear models. The accuracy reaches 95% for various modulation formats and link configurations. Using the more accurate model, the compensation performance is increased by 1 dB.
We present an analytical intra-channel nonlinear model by evaluating the reasonableness of large dispersion and lossless approximations. Improved estimation accuracies are verified under various link types, transmission distances and launch powers.
In this paper, a novel navigation method based on vision is proposed by integrating the advantages of watershed and pyramid segmentation methods. Using the idea of the continuity between two successive images, it is possible to give a reasonable advisory when the visual navigation fails. Besides that, we proposed to set a region of interest to accelerate the algorithm, using the method of image morphology...
A novel approach for broadband microwave frequency measurement based on bias manipulation of a dual-parallel Mach-Zehnder modulator is proposed and experimentally demonstrated. A 10−3 relative error verifies a significant accuracy improvement by this method.
To reduce the unfavorable influence of phosphene array irregularity on the form of Chinese character pattern so as to improve recognition accuracy in visual prostheses, two correction methods were put forward. One method was to generate phosphene closest to the target point in regular arrays using weighted nearest neighbor search. The other was to generate phosphene whose center located in the region...
As the only hieroglyph still being used in the world, NaXi pictograph performs an important role in studying the evolutionary history of human character. In the past, the NaXi pictograph was processed by hand which is very inefficient. Through analyzing the characteristics of NaXi pictograph and the present situation of information processing, this paper proposes an input method that can transfer...
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