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1. CN108631879 - Optical orthogonal frequency division multiplexing communication method and system based on probabilistic shaping mapping

Office
China
Application Number 201810455518.2
Application Date 14.05.2018
Publication Number 108631879
Publication Date 09.10.2018
Grant Number 108631879
Grant Date 12.11.2019
Publication Kind B
IPC
H04B 10/516
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
516Details of coding or modulation
H04B 10/548
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
516Details of coding or modulation
548Phase or frequency modulation
H04L 27/34
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18, or H04L27/26213
34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
H04L 27/36
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18, or H04L27/26213
34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
36Modulator circuits; Transmitter circuits
H04L 27/38
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18, or H04L27/26213
34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
38Demodulator circuits; Receiver circuits
CPC
H04B 10/516
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
516Details of coding or modulation
Applicants HUAQIAO UNIVERSITY
华侨大学
Inventors DONG ZE
董泽
WU XINXING
吴新星
XIAO QINGHUA
肖庆华
YOU JIALIN
由家林
ZENG YOUXU
曾佑旭
ZHANG KAIMING
张凯明
ZHANG HUIZHONG
张惠忠
Agents 厦门市首创君合专利事务所有限公司 35204
厦门市首创君合专利事务所有限公司 35204
Title
(EN) Optical orthogonal frequency division multiplexing communication method and system based on probabilistic shaping mapping
(ZH) 一种基于概率整形映射的光正交频分复用通信方法及系统
Abstract
(EN)
The invention relates to an optical orthogonal frequency division multiplexing communication method and a system thereof based on probabilistic shaping mapping, wherein the method comprises: generating a pseudo random binary bit stream PBRS signal; modulating the PRBS signal to obtain a PS-QAM complex signal; performing serial/parallel conversion, inverse fast Fourier transform and parallel/serialconversion on the PS-QAM complex signal to obtain a baseband OFDM signal, and obtaining an OFDM baseband signal with a cyclic prefix; modulating the OFDM baseband signal onto an optical carrier afterdigital/analog conversion to obtain a PS-OOFDM signal, and transmitting the signal to the optical fiber; converting the PS-OOFDM signal on the optical fiber into an analog OFDM electrical signal; performing analog/digital conversion on the analog OFDM electrical signal to obtain a digital OFDM signal, removing the cyclic prefix, and performing the inverse fast Fourier transform after parallel/serial conversion to obtain the PS-QAM complex signal; separating the real part and the imaginary part of the PS-QAM complex signal, and restoring the corresponding PBRS signal by de-mapping. The invention is capable of achieving shaping gain and improving the spectral efficiency of fiber communication.

(ZH)
本发明涉及一种基于概率整形映射的光正交频分复用通信方法及系统,方法包括:产生伪随机二进制比特流PRBS信号;将PRBS信号进行调制获得PS‑QAM复数信号;将PS‑QAM复数信号进行串/并转换、快速傅里叶逆变换及并/串转换获得基带OFDM信号,并获得添加循环前缀的OFDM基带信号;对OFDM基带信号进行数/模转换后调制到光载波上获得PS‑OOFDM信号并传输到光纤;将光纤上的PS‑OOFDM信号变换成模拟OFDM电信号;将模拟OFDM电信号进行模/数转换获得数字OFDM信号,去除循环前缀,并/串转换后进行快速傅里叶变换获得PS‑QAM复数信号;将PS‑QAM复数信号的实部虚部进行分离,解映射恢复对应的PRBS信号。本发明能获得整形增益并提高光纤通信的频谱效率。