WDM-PON system based on PS-PAM4 and communication method

A PS-PAM4, WDM-PON technology, applied in transmission systems, multiplexing communications, wavelength division multiplexing systems, etc., can solve the problem of decreased system receiving sensitivity, reduce nonlinear effects, and improve shaping gain. Effect

Inactive Publication Date: 2019-10-08
HUAQIAO UNIVERSITY
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Problems solved by technology

However, in the direct detection wavelength division multiplexing (WDM) passive optical network (PON) system, the signal is affected by the nonlinear effect of the fiber, resulting in a significant drop in the system receiving sensitivity

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  • WDM-PON system based on PS-PAM4 and communication method
  • WDM-PON system based on PS-PAM4 and communication method
  • WDM-PON system based on PS-PAM4 and communication method

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] In order to solve the problem existing in the prior art in the direct detection wavelength division multiplexing (WDM) passive optical network (PON) system, the signal is affected by the nonlinear effect of the optical fiber, resulting in a significant drop in system receiving sensitivity, and provides a Wavelength division multiplexing passive optical network WDM-PON system based on the probability shaping fourth-order pulse amplitude modulation format PS-PAM4, such as figure 1 As shown, it includes an optical line terminal, an optical distribution network, and several optical network units connected in sequence.

[0037] The optical line terminal includes a probability shaping generation module and a PS-PAM4 signal modulation module. Such as figure 2 As shown, the probability shaping generation module converts the pseudo-random bin...

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Abstract

The invention relates to a WDM-PON (Wavelength Division Multiplexing-Passive Optical Network) system based on PS-PAM4 and a WDM-PON system based communication method, which change the distribution probability of each amplitude in a PAM4 signal according to Maxwell-Boltzmann distribution, reduce the nonlinear effect of the signal and realize the transmission with low bit error rate and high receiving sensitivity. According to the invention, the shaping gain can be obtained and the nonlinear effect of the WDM-PON can be improved.

Description

technical field [0001] The present invention relates to digital modulation technology in the field of optical fiber communication, more specifically, to a WDM-PON system based on PS-PAM4, and a communication method based on the WDM-PON system. Background technique [0002] With the growth of users' demand for transmission, optical fiber communication, as a long-distance and large-capacity transmission method, has become the main research direction of communication. [0003] Due to the simple implementation and low computational complexity of PAM4 signals, it has great advantages in short-distance, high-speed optical fiber transmission systems. The combined application of PAM4 and direct detection technology can reduce system cost and energy consumption. However, in the direct detection wavelength division multiplexing (WDM) passive optical network (PON) system, the signal is affected by the nonlinear effect of the fiber, which leads to a significant drop in the system recei...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2543H04B10/25H04B10/524H04B10/548H04J14/02
CPCH04B10/2543H04B10/524H04B10/548H04J14/0278H04B10/25891
Inventor 董泽肖庆华吴新星陈逸凡
Owner HUAQIAO UNIVERSITY
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