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A Blind ICI Phase Noise Compensation Method for Large Linewidth Co-ofdm Systems

A CO-OFDM, phase noise compensation technology, applied in the field of blind ICI phase noise compensation, can solve the problem of inability to take into account the compensation effect and computational complexity, low computational complexity, etc., to improve spectrum utilization, improve compensation effect, and improve The effect of the phase noise equalization effect

Active Publication Date: 2019-04-23
CERTUS NETWORK TECHNANJING
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Problems solved by technology

[0006] In order to overcome the shortcomings of the phase noise compensation method of the existing CO-OFDM system that cannot balance the compensation effect and computational complexity, the present invention provides a CO-OFDM system with good compensation effect and low computational complexity, which is suitable for large-linewidth CO-OFDM Systematic Blind ICI Phase Noise Compensation Method

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  • A Blind ICI Phase Noise Compensation Method for Large Linewidth Co-ofdm Systems
  • A Blind ICI Phase Noise Compensation Method for Large Linewidth Co-ofdm Systems
  • A Blind ICI Phase Noise Compensation Method for Large Linewidth Co-ofdm Systems

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Embodiment 1

[0052] The method of the present invention mainly relates to the signal processing problem of the receiving end of the coherent optical orthogonal frequency division multiplexing CO-OFDM system, and refer to the detailed description of the CO-OFDM system structure in the background art.

[0053] Such as figure 1 As shown, the CO-OFDM system includes a CO-OFDM system transmitter module 101, a CO-OFDM optical modulation module 102, an optical fiber transmission module 103, a photoelectric detection module 104, and a CO-OFDM system receiver module 105. The signal generated by the system transmitter After the optical modulation, the up-conversion becomes the CO-OFDM signal in the optical domain. The CO-OFDM signal is transmitted through the optical fiber, balanced by the detector, and converted into the electrical domain signal by photoelectric conversion. Signal processing to restore the original sender data. The initial 50Gb / s pseudo-random code binary data stream is modulated by h...

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Abstract

Provided is a blind ICI phase noise compensation method applicable to a large-linewidth CO-OFDM system. The method includes: performing CPE phase noise compensation on data at a receiving end; then performing rough blind ICI phase noise compensation on time domain data after CPE phase noise compensation; later, deciding frequency domain data after rough blind ICI phase noise compensation, converting the decided frequency domain data to time domain data through fast Fourier transform, dividing each OFDM data symbol in the time domain data and the time domain data before CPE phase noise compensation into a plurality of sub-symbols, and calculating phase noise approximate values of the sub-symbols; and finally performing fine ICI phase noise compensation. According to the blind ICI phase noise compensation method applicable to the large-linewidth high-speed CO-OFDM system, the compensation effect is good, and the calculating complexity is low.

Description

Technical field [0001] The invention belongs to the technical field of optical communication networks, and particularly relates to a blind ICI phase noise compensation method of a large-line width CO-OFDM system. Background technique [0002] Coherent optical orthogonal frequency division multiplexing system due to its outstanding anti-dispersion and polarization mode dispersion capabilities, not only for future high-speed and long-distance optical communication systems, but also become one of the most likely alternative transmission technologies in the future optical access network. One. [0003] The structure of CO-OFDM system is as figure 1 As shown, it can be divided into 5 modules according to their functions: CO-OFDM system transmitter module 101, optical modulation module 102, optical fiber transmission module 103, photoelectric detection module 104 and CO-OFDM system receiver module 105, CO-OFDM transmitter The electrical domain signal generated by the end module is conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2663H04L27/2665H04L27/2671H04L27/2672H04L27/2691
Inventor 任宏亮卢瑾覃亚丽乐孜纯
Owner CERTUS NETWORK TECHNANJING
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