CO-OFDM transmission system nonlinear damage compensation system and method

A technology of nonlinear damage and transmission system, which is applied in the field of nonlinear damage compensation system of CO-OFDM transmission system, which can solve problems such as inter-carrier interference and achieve the effect of compensating nonlinear damage

Active Publication Date: 2020-06-30
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the OFDM technology divides the channel into multiple orthogonal and parallel sub-channels, the system is very easy to meet the phase matching conditions of the nonlinear four-wave mixing effect, resulting in serious inter-carrier interference.
At

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  • CO-OFDM transmission system nonlinear damage compensation system and method
  • CO-OFDM transmission system nonlinear damage compensation system and method
  • CO-OFDM transmission system nonlinear damage compensation system and method

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Example Embodiment

[0028] First embodiment, this embodiment provides a non-linear damage compensation system for CO-OFDM transmission system;

[0029] Such as figure 1 As shown, a CO-OFDM transmission system nonlinear damage compensation system includes:

[0030] The radio frequency OFDM transmitter, the optical I / O modulator, the optical fiber link, the optical coherent detector and the radio frequency OFDM receiver are connected in sequence; the optical fiber link is provided with several OPC optical phase conjugation devices at intervals;

[0031] The radio frequency OFDM transmitter modulates and maps the signal to be transmitted, and sends the modulated and mapped signal to the optical I / O modulator; the optical I / O modulator converts the received signal from an electrical signal to an OFDM optical signal, And transmit the OFDM optical signal to the optical fiber link;

[0032] Each OPC optical phase conjugation device in the optical fiber link couples the signal, and generates the opposite signal ...

Example Embodiment

[0079] In the second embodiment, this embodiment provides a method for non-linear damage compensation in a CO-OFDM transmission system;

[0080] The radio frequency OFDM transmitter modulates and maps the signal to be transmitted, and sends the modulated and mapped signal to the optical I / O modulator; the optical I / O modulator converts the received signal from an electrical signal to an OFDM optical signal, and OFDM optical signal is transmitted to the optical fiber link;

[0081] Each OPC optical phase conjugation device in the optical fiber link couples the signal, and generates the opposite signal through the high nonlinear fiber HNLF, thereby compensating the nonlinear damage of the optical fiber link;

[0082] The optical fiber link sends the output signal to the optical coherent detector; the optical coherent detector demodulates the received signal, demodulates the optical signal into an electrical signal, and sends the demodulated electrical signal to the radio frequency OFDM...

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Abstract

The invention discloses a CO-OFDM transmission system nonlinear damage compensation system and method, and the system comprises a radio frequency OFDM transmitter which carries out the modulation andmapping of a to-be-transmitted signal, and transmits the modulated and mapped signal to an optical I/O modulator; an optical I/O modulator which converts the received signal from an electric signal into an OFDM optical signal, and transmits the OFDM optical signal to an optical fiber link; each OPC optical phase conjugation device in the optical fiber link couples the signals and generates opposite signals through a high nonlinear optical fiber HNLF so as to compensate nonlinear damage of the optical fiber link; the optical fiber link sends an output signal to the optical coherence detector; the optical coherence detector demodulates the received signal, demodulates the optical signal into an electric signal, and sends the demodulated electric signal to the radio frequency OFDM receiver; and the radio frequency OFDM receiver restores the received electric signal.

Description

technical field [0001] The present disclosure relates to the technical field of optical communication, in particular to a system and method for nonlinear damage compensation of a CO-OFDM transmission system. Background technique [0002] The statements in this section merely mention background art related to the present disclosure and do not necessarily constitute prior art. [0003] Optical communication CO-OFDM (Coherent Optical Orthogonal Frequency Dixision Multiplexing, coherent optical orthogonal frequency division multiplexing) transmission system perfectly integrates OFDM modulation technology and coherent receiving technology, but while combining the advantages of the two, the corresponding problems and Challenges also follow. [0004] In the process of realizing the present disclosure, the inventors found that the following technical problems existed in the prior art: [0005] Since the OFDM technology divides the channel into multiple orthogonal and parallel sub-...

Claims

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Application Information

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IPC IPC(8): H04B10/61H04B10/2543H04B10/54
CPCH04B10/2543H04B10/541H04B10/6163
Inventor 王晶晶于宏光张立人杜勇涛孔晓艺颜正凯
Owner SHANDONG NORMAL UNIV
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