高速高频谱利用率新型光调制格式的优化设计

发布时间：2018-05-08 05:53

本文选题：光调制格式 + 光纤信道　；参考：《北京邮电大学》2015年硕士论文

【摘要】：在人类社会向信息化迈进的过程中,人们对通信容量和通信带宽的需求日益增长,这使新型光调制格式越发受到关注,并迅速在光通信中扮演重要角色。如何将系统误码率限制在一定范围内,确保光信号长距离、高速率和大容量地可靠传输,是光通信技术领域一直以来追求的目标。本文从光耦合的原理入手,分析了光耦合、调制和解调各个关键器件的工作原理,针对光信号的振幅、频率、相位和偏振4种格式的调制特点,创新性地开展了CSRZ-FSK-16QAM-APol新型调制格式的理论和仿真研究。并将该格式的光信号在所建立的标量和矢量光纤信道模型中进行传输,就光纤信道的色散和非线性效应等对该信号的影响进行了进行了分析。主要内容包括以下几个部分： 1.在广泛阅读国内外光通信研究领域相关文献的基础上,对光的调制、解调和光纤信道特性的研究现状、重点和热点进行了分析；就光的调制、解调和光纤信道进行了MATLAB/Simulink仿真研究。 2.从光的耦合原理入手,分析了光纤耦合器、相位调制器、马赫曾德尔调制器、IQ调制器、90°混频器,偏振分集接收器和光电平衡检测器等光通信关键器件的工作原理,详细描述了各器件在光通信系统中的特点。 3.通过深入研究CSRZ-FSK、星形16QAM和APol调制格式产生的原理,建立了CSRZ-FSK、星形16QAM和APol调制格式的数学模型,综合ASK、 FSK、 PSK和APol调制技术,从原理上创新性地提出并建立了CSRZ-FSK-16QAM-APol新型调制格式的发射机模型。 4.采用分段分步傅立叶(SSFM)数值方法求解非线性薛定谔方程(NLSE),对光纤信道的传输损耗、色度色散、偏振模色散和非线性效应等特性进行了数学描述；通过MATLAB m语言编程和Simulink仿真,建立了基于数学描述的标量和矢量形式的光纤信道仿真模型。 5.通过分析APol、星形16QAM和CSRZ-FSK信号解调原理,从90°混频器、偏振分集接收器和光电平衡检测器的原理年入手,详细描述了经过接收机解调还原基带信号的整个过程。 6.通过仿真CSRZ-FSK-16QAM-APol新型调制格式光信号的产生、通过标量和矢量光纤信道和接收解调整个过程,得到该光纤通信系统各关键点上的信号波形和星座图,以及信号传输的误比特率(BER)等,并以此为依据深入分析CSRZ-FSK-16QAM-APol新型调制格式光信号的各种性能,对该新型调制格式信号的传输质量和传输效能进行了评估。 7.结果表明,CSRZ-FSK-16QAM-APol新型调制格式信号提高了对光纤信道色散和非线性效应的容忍度,提高了系统的频带利用率、传输速率和传输容量,并且使得原本单一调制实现起来非常困难的技术得到了良好的优势互补,产生出1+12的独特效果。
[Abstract]:In the process of human society, the demand for communication capacity and communication bandwidth is increasing. This makes the new optical modulation format more and more concerned, and plays an important role in the optical communication.
How to limit the error rate of the system to a certain range, to ensure the long distance of the optical signal, the high speed rate and the high capacity and reliable transmission, is the goal that the optical communication technology has been pursuing.
Starting with the principle of optical coupling, this paper analyzes the working principles of the key devices of optical coupling, modulation and demodulation. In view of the modulation characteristics of the 4 formats of the amplitude, frequency, phase and polarization of the optical signal, the theory and Simulation of the new CSRZ-FSK-16QAM-APol modulation format are innovatively carried out, and the optical signal in this format is established. In the scalar and vector optical fiber channel models, the effect of dispersion and nonlinear effects on the signal is analyzed.
The main contents include the following parts:
1. on the basis of extensive reading of the relevant literature in the field of optical communication at home and abroad, the research status of modulation, demodulation and fiber channel characteristics of light is analyzed, and the focus and hot spots are analyzed. The MATLAB/Simulink simulation of optical modulation, demodulation and optical fiber channel is carried out.
2. the principle of optical fiber coupler, phase modulator, Maher Zeng Del modulator, IQ modulator, 90 degree mixer, polarization diversity receiver and photoelectric balance detector are analyzed, and the characteristics of each device in the optical communication system are described in detail.
3. through the in-depth study of the principles of CSRZ-FSK, star 16QAM and APol modulation formats, a mathematical model of CSRZ-FSK, star 16QAM and APol modulation formats is established, and the modulation techniques of ASK, FSK, PSK and APol are integrated, and the transmitter model of the CSRZ-FSK-16QAM-APol new modulation format is proposed and established in principle.
4. the piecewise step Fu Liye (SSFM) numerical method is used to solve nonlinear Schrodinger equation (NLSE), and the transmission loss, chromatic dispersion, polarization mode dispersion and nonlinear effect of the optical fiber channel are described mathematically. Through MATLAB M language programming and Simulink simulation, a mathematical description of scalar and vector forms is established. Channel simulation model.
5. through the analysis of the principle of APol, star 16QAM and CSRZ-FSK signal demodulation, from the principle year of 90 degree mixer, polarization diversity receiver and photoelectric balance detector, the whole process of demodulating and reducing the baseband signal through the receiver is described in detail.
6. through the simulation of CSRZ-FSK-16QAM-APol new modulation format light signal, through the scalar and vector optical fiber channel and the whole process of receiving and demodulation, the signal waveform and constellation of the key points of the optical fiber communication system, and the bit error rate (BER) of the signal transmission are obtained. Based on this, the new type of CSRZ-FSK-16QAM-APol is deeply analyzed. The performance of the modulation format optical signal is evaluated, and the transmission quality and transmission efficiency of the new modulation format signal are evaluated.
7. the results show that the new modulation format signal of CSRZ-FSK-16QAM-APol improves the tolerance to the dispersion and nonlinear effect of the optical fiber channel, improves the frequency bandwidth of the system, the transmission rate and the transmission capacity, and makes the very difficult technology of the original single modulation achieved good complementarity and produces the unique 1+12. Effect.

【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN761

【参考文献】