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

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...

AI Technical Summary

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 in optical transmission distance

According to the test results of current mainstream equipment manufacturers, the transmission distance of the 400Gb / s system using dual-carrier and 16QAM modulation technology is only 1 / 4 of that of the 100Gb / s system, or even shorter

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