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A flexible optical network time domain equalization method and system based on compound neural network

A technology of neural network and time-domain equalization, which is applied in the direction of neural learning method, biological neural network model, multiplexing system selection device, etc., can solve problems such as narrow application range, and achieve wide application range and good channel equalization effect , the effect of failure prevention

Active Publication Date: 2020-12-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide a flexible optical network time-domain equalization method and system based on a composite neural network. The existing equalization methods can only perform equalization compensation for a certain channel condition. Therefore, It aims to solve the problem that the existing time-domain equalization method has a narrow application range in flexible optical networks

Method used

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  • A flexible optical network time domain equalization method and system based on compound neural network
  • A flexible optical network time domain equalization method and system based on compound neural network
  • A flexible optical network time domain equalization method and system based on compound neural network

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Embodiment

[0105] Such as Figure 4 As shown, the embodiment provides a schematic diagram of a typical transmission system, including three parts: a sending end, a transmission link, and a receiving end.

[0106] In the sending end, a tunable laser working in the C-band is used as the light source. After the signal to be sent is preprocessed by the digital signal processing module of the sending end, the digital-to-analog conversion is completed by the arbitrary waveform generator to obtain an analog signal, which is amplified by the electric amplifier. Finally, the Mach-Zehnder modulator is driven to generate the modulated optical signal, and the fiber input power is regulated by the erbium-doped fiber amplifier;

[0107] The transmission link is a standard single-mode fiber, and the adjustable optical attenuator can be used to adjust the received optical power and optical signal-to-noise ratio;

[0108] At the receiving end, the optical signal is received and converted into an electri...

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Abstract

The invention discloses a flexible optical network time-domain equalization method and system based on a composite neural network, belonging to the field of optical fiber communication systems, including: (1) preprocessing the received signal transmitted by the flexible optical network; (2) calculating the preprocessing The amplitude distribution histogram of the received signal; (3) input the amplitude distribution histogram to the first-level multi-task neural network classifier, and output the transmission parameters of the flexible optical network; (4) according to the transmission parameters of the flexible optical network, set the first The weight and bias parameters of the second-level neural network regressor; (5) the second-level neural network regressor is used to perform time-domain equalization on the preprocessed received signal; wherein, the input of the first-level multi-task neural network classifier The number of neurons is the same as the group number of the amplitude distribution histogram, and the number of output neurons is the same as the transmission parameters of the flexible optical network. The time domain equalization method and system disclosed by the invention have a wider application range.

Description

technical field [0001] The invention belongs to the field of optical fiber communication systems, and more specifically relates to a flexible optical network time domain equalization method and system based on a compound neural network. Background technique [0002] In recent years, with the popularization of smart terminals and the development of new network services, network traffic has grown explosively, which has brought enormous pressure on the capacity of communication systems. In order to meet the demand for massive data transmission, on the one hand, it is also necessary to overcome various transmission impairments in the optical fiber communication system and improve the single-fiber transmission capacity; on the other hand, it is also necessary to dynamically allocate network resources according to actual needs, and the corresponding transmission impairment compensation method also needs Adjust accordingly. [0003] In order to improve transmission efficiency, fle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04B10/60G06N3/04G06N3/08
CPCH04Q11/0062H04B10/60G06N3/08G06N3/045
Inventor 付松年杨正童天昊程逸骏唐明
Owner HUAZHONG UNIV OF SCI & TECH
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