Coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system, method for phase noise compensation in coherent optical orthogonal frequency division multiplexing based long-distance passive optical network and application thereof

A technology of phase noise compensation and passive optical network, applied in the field of phase noise compensation, can solve the problem of reducing the transmission data rate and achieve the effect of high data rate, good flexibility and long transmission distance

Active Publication Date: 2017-05-10
ZHONGTIAN BROADBAND TECH
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Problems solved by technology

However, these methods reduce the transfer data rate

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  • Coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system, method for phase noise compensation in coherent optical orthogonal frequency division multiplexing based long-distance passive optical network and application thereof
  • Coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system, method for phase noise compensation in coherent optical orthogonal frequency division multiplexing based long-distance passive optical network and application thereof
  • Coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system, method for phase noise compensation in coherent optical orthogonal frequency division multiplexing based long-distance passive optical network and application thereof

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[0052] Scenarios provided for the downlink of 12 ONUs of a single OLT. Respectively and In both cases, generated at the Optical Line Termination for each Optical Network Unit (ONU) The random binary sequence of is mapped to the M-array encoder, and the 12 coded sequences are further modulated into a 12-band OFDM signal by an OFDM modulator with the following parameters: Ratio positioning For each subband, 1024 IFFT points, 64 subcarriers. The first 6 subbands located to the left of the zero subcarrier have the same baseband center frequency as the other 6 frequency bands located to the right of the zero subcarrier. Generate two symmetrical 6-band OFDM signals representing the left and right subcarriers, each with bandwidth, subcarrier spacing and protective belt. continuous wave (CW) laser at a frequency of 193.1THz and The transmit power of the two 6-band OFDM signals produces optical single sideband modulation.

[0053] 12-band coherent optical orthogonal fr...

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Abstract

The invention relates to a coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system and a method for phase noise compensation in a coherent optical orthogonal frequency division multiplexing based long-distance passive optical network. The method is used for processing phase noise compensation caused by dispersion of optical signals in long-distance transmission. The coherent optical orthogonal frequency division multiplexing based long-distance passive optical network system comprises an optical line terminal (OLT), an optical distribution network (ODN) and multiple optical network units (UNUs); the optical line terminal comprises a pseudorandom sequence, an M array coder, an orthogonal frequency division multiplexing modulator, a low-pass filter and an optical RF up-converter; the orthogonal frequency division multiplexing modulator comprises a serial-parallel converter, a Fourier inversion, a cycle prefix CP adder, a parallel-serial converter and an analog-digital converter; the optical RF up-converter comprises a Schottky diode, a Mach-Zehnder modulator MZM and a 90-degree phase shifter; the optical distribution network comprises a feeder line optical fiber, a dispersion compensation fiber, a standard single-mode optical fiber, an optical amplifier, a power amplifier and a branch line; and the optical network unit comprises a local laser, a 90-degree phase shifter, a coupler, a photodiode, a adder-subtractor, an orthogonal frequency division multiplexing modulator and an M array decoder.

Description

technical field [0001] The present invention relates to a method for compensating phase noise in a long-distance passive optical network based on coherent optical OFDM and its system and application. phase noise compensation. The method of the invention has strong practicability, has the advantages of high data rate, long transmission distance, high spectrum efficiency and high power splitter ratio, and has great significance in application in the next generation passive optical network. Background technique [0002] Optical Orthogonal Frequency Division Multiplexing based long-haul passive optical network (O-OFDM LRPON) is one of the mainstreams of next-generation passive optical network, and due to its high data rate, long transmission distance, high spectral efficiency and high power distribution device ratio, attracting extensive attention from academia and operators. It also exhibits excellent flexibility, allowing real-time spectrum allocation based on instantaneous ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2525H04B10/2569H04B10/61H04Q11/00
CPCH04B10/2525H04B10/2569H04B10/6161H04Q11/0067Y02D30/70
Inventor 穆罕默德本泽格姆何品翰何伟胡晶晶徐翠揭水平符小东
Owner ZHONGTIAN BROADBAND TECH
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