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Method for rapidly calculating high-order noise coefficient in EGN model

A fast calculation, noise figure technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problem of lack of relevant literature references

Active Publication Date: 2019-07-09
DALIAN UNIV
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Problems solved by technology

Corresponding to different modulation formats, the values ​​of Φ and Ψ are given in the literature (as shown in Table 1), but there is no relevant literature reference for how to calculate

Method used

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  • Method for rapidly calculating high-order noise coefficient in EGN model
  • Method for rapidly calculating high-order noise coefficient in EGN model
  • Method for rapidly calculating high-order noise coefficient in EGN model

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Embodiment Construction

[0041] Attached below Figure 1-5 The method for quickly calculating the high-order noise coefficient in the EGN model is further explained.

[0042] The advent of smart cities requires optical fiber transmission networks to have higher and higher transmission speeds and capacities, so people began to seek higher modulation formats to meet the requirements. PM-M-QAM modulation is the most commonly used mode in optical fiber transmission networks, such as PM-QPSK, PM-16QAM, PM-64QAM, and even higher-order PM-256QAM. How to get their high-order noise coefficients Φ and Ψ, so that it is becoming more and more important to apply the EGN model to accurately evaluate the transmission system. As shown in the formula (2) in the background art, the most basic method is to give the coordinates of each symbol on the constellation diagram under different modulation formats, and then obtain the second-order, fourth-order and sixth-order expectations for calculation. Using this method, th...

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Abstract

The invention discloses a method for rapidly calculating a high-order noise coefficient in an EGN model, and belongs to the technical field of optical fiber communication system transmission. The technical scheme comprises the following steps: degrading a two-dimensional constellation diagram into two independent and identical one-dimensional constellation diagrams, wherein the two one-dimensionalconstellation diagrams are defined as an I component and a Q component respectively; finding out symbol coordinates on the I component and the Q component; and converting the calculation into an operation on a one-dimensional axis so as to obtain a high-order noise item coefficient phi and psi. The method for quickly calculating the high-order noise coefficient in the EGN model has the beneficialeffects that the high-order noise coefficient phi and psi under different modulation formats in an optical fiber communication system can be quickly and accurately calculated, and a prerequisite basis is provided for analysis of nonlinear noise by the EGN model.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication system transmission, in particular to a method for quickly calculating high-order noise coefficients in an EGN model. Background technique [0002] In the 50 years since the development of optical fiber communication, the whole world has been closely connected through information transmission networks, which greatly facilitates people's communication and promotes global development. However, with the advent of the era of big data and smart cities, the capacity of optical fiber communication systems has been greatly challenged. This requires a complete set of theoretical models to assist in the development of system potential, so as to meet the growing transmission needs. [0003] As we all know, the two main factors that restrict the transmission performance of optical fiber communication systems are linear noise and nonlinear noise. Among them, the linear noise mainly comes f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/079
CPCH04B10/07953
Inventor 姜艳超裴悦琨韩心新谷宇
Owner DALIAN UNIV
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