Co-ofdm system and its receiver, nonlinear equalization method and device

An equalization method and nonlinear technology, which is applied in the field of coherent optical communication, can solve the problems of poor anti-linear distortion and other problems, and achieve the effects of improving computing speed, simple structure, and reducing complexity
CN110233812BActive Publication Date: 2022-05-24STATE GRID ANHUI ELECTRIC POWER CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID ANHUI ELECTRIC POWER CO LTD
Publication Date
2022-05-24

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Abstract

The present invention discloses a CO-OFDM system, its receiving end, and a nonlinear equalization method and device. The method includes: clustering received OFDM symbols; determining the OFDM symbols as edge points or Non-edge points; input the OFDM symbols determined as edge points into the radial basis function RBF neural network; output the nonlinear equalization result of the OFDM symbols according to the output of the RBF neural network of the edge points or the clustering results of the non-edge points. The complexity of the nonlinear equalization scheme of the present invention is not high, and the nonlinear equalization performance is good.
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Description

Technical field

[0001] The present invention relates to the field of coherent optical communication technology, in particular refers to a CO-OFDM system and a receiving end and a nonlinear equalization method, apparatus. Background

[0002] Coherent optical quadrature frequency division multiplexing (CO-OFDM) integrates the advantages of electric domain quadrature frequency division multiplexing (OFDM) modulation technology and coherent optical communication, with high transmission rate, strong anti-dispersion ability, high spectrum utilization, flexible and effective compensation for the linear and nonlinear damage of the receiving digital signal processing (DSP) system, has become one of the technologies that have attracted much attention in the fields of medium and long-distance high-speed communication systems and optical access networks.

[0003] However, the peak-to-average ratio (PAPR) of OFDM signals in the CO-OFDM system is high, which is very sensitive to the nonlinear ...

Claims

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