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Design Method of Multiple Channel Equalizer in Optical Fiber Communication System

An optical fiber communication system and channel equalizer technology, applied in baseband systems, transmission systems, digital transmission systems, etc., can solve problems such as signal attenuation, fiber nonlinearity limiting transmission distance, etc., achieve low bit error rate, and solve performance degradation. , to ensure the effect of reliability

Active Publication Date: 2022-02-11
SUZHOU UNIV
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Problems solved by technology

However, fiber nonlinearity induced by the Kerr effect is the main obstacle limiting the achievable transmission distance
In the case of long distances and high bandwidths, this non-linearity often leads to significant attenuation of the signal during transmission

Method used

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  • Design Method of Multiple Channel Equalizer in Optical Fiber Communication System
  • Design Method of Multiple Channel Equalizer in Optical Fiber Communication System
  • Design Method of Multiple Channel Equalizer in Optical Fiber Communication System

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0048]In the realization of the equalizer, there have been many methods in the past, mainly divided into the Volterra series of nonlinear equalizers, machine learning-based decision makers, support vector machines, and artificial neural networks. For the equalizer design based on artificial neural network, two real-valued neural networks are generally used to process the real part and the imaginary part of the complex signal respectively, thus ignoring the correlation between the real part and the imaginary part of the complex signal. Fortunately, the introduction of complex-valued neural network and its optimization algorithm makes it possible to directly process complex signals. ...

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Abstract

The invention discloses a method for designing a complex channel equalizer of an optical fiber communication system, comprising: constructing a complex channel equalizer using a multi-layer forward complex-valued neural network, the complex channel equalizer is used in an optical fiber communication system, and consists of multiple time points The vector composed of digital signals is used as the input of the complex channel equalizer, so as to correct the distorted signal generated during the signal transmission process, and use the discriminator to judge it, so as to reduce the bit error rate of the optical fiber communication system. Beneficial effects of the present invention: the present invention proposes a method for designing a multi-channel equalizer that can be used in an optical fiber communication system. Compared with channel equalizers designed by other methods, the multi-channel equalizer realized by the present invention can achieve lower The bit error rate ensures the reliability of signal transmission.

Description

technical field [0001] The invention relates to the fields of communication engineering and artificial intelligence, in particular to a design method for a multi-channel equalizer of an optical fiber communication system. Background technique [0002] A high-speed and large-capacity communication system is essential for the ever-increasing communication demands. The optical fiber communication system uses various multiplexing formats of high-order quadrature amplitude modulation to extend the communication bandwidth to other frequency bands. However, fiber nonlinearity induced by the Kerr effect is the main obstacle limiting the achievable transmission distance. In the case of long distances and high bandwidths, this non-linearity often leads to significant attenuation of the signal during transmission. It has become a consensus to compensate the channel by means of digital signal processing at the receiving end, so as to achieve the correction of the existing channel. Ch...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03G06N3/04G06N3/08
CPCH04L25/03165G06N3/084G06N3/045
Inventor 黄鹤张永亮
Owner SUZHOU UNIV
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