CO-OFDM system and receiving end thereof, and 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-nonlinear distortion and other problems, and achieve the effects of increasing computing speed, improving nonlinear equalization performance, and reducing complexity

Active Publication Date: 2019-09-13
STATE GRID ANHUI ELECTRIC POWER +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 receiving end thereof, and nonlinear equalization method and device
  • CO-OFDM system and receiving end thereof, and nonlinear equalization method and device
  • CO-OFDM system and receiving end thereof, and nonlinear equalization method and device

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0054] It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that when an element is referred to as being "connected...

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Abstract

The invention discloses a CO-OFDM system and a receiving end thereof, and a nonlinear equalization method and device. The method comprises the following steps: clustering received OFDM symbols; judging the OFDM symbol as an edge point or a non-edge point according to a clustering result; inputting the OFDM symbols judged as the edge points into a radial basis function RBF neural network; and outputting a nonlinear equalization result of the OFDM symbol according to the output of the RBF neural network of the edge points or the clustering result of the non-edge points. The nonlinear equalization scheme provided by the invention is low in complexity and good in nonlinear equalization performance.

Description

technical field [0001] The present invention relates to the technical field of coherent optical communication, in particular to a CO-OFDM system, its receiving end, and a nonlinear equalization method and device. Background technique [0002] Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) combines the advantages of electrical domain Orthogonal Frequency Division Multiplexing (OFDM) modulation technology and coherent optical communication, and has the characteristics of high transmission rate, strong anti-dispersion ability, and high spectrum utilization. , which can flexibly and effectively compensate the linear and nonlinear damage of the digital signal processing (DSP) system at the receiving end, and 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 the OFDM signal in the CO...

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Application Information

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Patent Type & Authority Applications(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
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