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

Active Publication Date: 2022-05-24
STATE GRID ANHUI ELECTRIC POWER CO LTD +2
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Problems solved by technology

[0008] Because the high-order quadrature amplitude modulation format greatly improves the symbol rate, saves system bandwidth, and improves the spectral efficiency of system transmission, but high-order QAM obtains its high spectrum utilization by sacrificing its anti-interference, And the higher the modulation order, the worse its ability to resist nonlinear distortion

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

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[0052] To make the object, technical solution and advantages of the present invention more clearly understood, the following in conjunction with specific embodiments, and with reference to the accompanying drawings, the present invention is further described in detail.

[0053] Embodiments of the present invention are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar designations from beginning to end indicate the same or similar elements or elements with the same or similar functions. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present invention only, and cannot be construed as limiting the present invention.

[0054] Those skilled in the art will appreciate that, unless specifically stated, the singular forms used herein "one", "one", "said" and "the" may also include plural forms. It should be further understood that when we say that an element i...

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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.

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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26G06K9/62G06N3/08H04B10/61
CPCH04L27/2602G06N3/08H04B10/6163H04B10/6161G06F18/23213
Inventor 张杰李亚杰刘守东宋皓鲲赵永利张会彬于浩王伟李振伟
Owner STATE GRID ANHUI ELECTRIC POWER CO LTD
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