Electronic dispersion compensation (EDC) method for high-speed optical communication system

A technology of optical communication system and compensation method, applied in transmission system, electromagnetic wave transmission system, elimination of distortion/dispersion, etc., can solve problems such as shortening of optical transmission distance

Inactive Publication Date: 2016-11-16
WENZHOU UNIVERSITY
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Problems solved by technology

However, Shannon's theory determines that the higher the spectral efficiency of the system, the greater the signal-to-noise ratio required for error-free transmission of signals, and an excessive signal-to-noise ratio will directly lead to a significant reduction i

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  • Electronic dispersion compensation (EDC) method for high-speed optical communication system
  • Electronic dispersion compensation (EDC) method for high-speed optical communication system
  • Electronic dispersion compensation (EDC) method for high-speed optical communication system

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Embodiment Construction

[0030] A high-speed optical communication system electrical dispersion compensation method based on a phase excitation feedback structure network includes the following steps:

[0031] (1) Design a continuous multi-threshold excitation function according to the characteristics of the multi-ary phase shift keying signal

[0032] M-ary Quaternary Phase Shift Keying (MPSK), also known as multi-phase system. Because of its high spectral efficiency and good anti-noise performance, especially quadrature phase shift keying (QPSK) has been widely used in high-speed optical communication systems. In order to obtain a greater transmission rate, higher-order phase-shift keying (PSK) signals will be widely used in future optical communication systems. However, as the value of M increases, the difference between the phases will decrease exponentially, greatly reducing the reliability of the system, increasing the bit error rate at the receiving end, and greatly increasing the difficulty o...

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Abstract

The invention discloses an electronic dispersion compensation (EDC) method for a high-speed optical communication system. The method comprises the following steps: firstly, configuring a phase multi-threshold excitation feedback structure network by means according to a multi-phase modulation optical communication system model; then designing a phase multi-threshold excitation function, providing the relation between a decay factor and an inflection point in the designed phase multi-threshold excitation function, and showing a solving method; further, designing a brand new energy function to guide the operation of network feedback; and finally in execution, enabling the network not to stop giving feedback until the value of the energy function is minimized and then to exit a loop. The EDC method is mainly targeted at a dispersion compensation occasion of single module value and multiple phases which is the modulation mode adopted by the optical communication system. The EDC method is applicable no matter whether constellation points of the modulation mode are sparse or dense.

Description

technical field [0001] The present invention relates to the field of optical communication coherent signal detection, in particular to a high-speed optical communication system electrical dispersion compensation method, mainly aimed at the dispersion compensation occasions where the modulation mode adopted by the optical communication system is a single modulus and multiple phases, regardless of the modulation mode constellation point Whether it is sparse or dense, the method can be applied. Background technique [0002] Technologies such as coherent detection, complex modulation schemes, and polarization multiplexing (DP) have played an important role in improving transmission capacity. Among them, the optical coherent receiving technology makes it possible for the transmitter to adopt multi-dimensional multi-ary modulation code patterns while improving the receiving sensitivity of the optical receiver, and the multi-dimensional multi-ary modulation technology can carry mul...

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Application Information

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IPC IPC(8): H04B10/2513H04B10/2525
CPCH04B10/2513H04B10/2525
Inventor 阮秀凯崔桂华谈燕花李昌戴瑜兴周志立蔡启博张耀举祝贵君周月赵杭芳
Owner WENZHOU UNIVERSITY
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