本文選題：光調(diào)制格式 + 光纖信道��； 參考：《北京郵電大學》2015年碩士論文

【摘要】：在人類社會向信息化邁進的過程中,人們對通信容量和通信帶寬的需求日益增長,這使新型光調(diào)制格式越發(fā)受到關(guān)注,并迅速在光通信中扮演重要角色。 如何將系統(tǒng)誤碼率限制在一定范圍內(nèi),確保光信號長距離、高速率和大容量地可靠傳輸,是光通信技術(shù)領(lǐng)域一直以來追求的目標。 本文從光耦合的原理入手,分析了光耦合、調(diào)制和解調(diào)各個關(guān)鍵器件的工作原理,針對光信號的振幅、頻率、相位和偏振4種格式的調(diào)制特點,創(chuàng)新性地開展了CSRZ-FSK-16QAM-APol新型調(diào)制格式的理論和仿真研究。并將該格式的光信號在所建立的標量和矢量光纖信道模型中進行傳輸,就光纖信道的色散和非線性效應(yīng)等對該信號的影響進行了進行了分析。 主要內(nèi)容包括以下幾個部分： 1.在廣泛閱讀國內(nèi)外光通信研究領(lǐng)域相關(guān)文獻的基礎(chǔ)上,對光的調(diào)制、解調(diào)和光纖信道特性的研究現(xiàn)狀、重點和熱點進行了分析；就光的調(diào)制、解調(diào)和光纖信道進行了MATLAB/Simulink仿真研究。 2.從光的耦合原理入手,分析了光纖耦合器、相位調(diào)制器、馬赫曾德爾調(diào)制器、IQ調(diào)制器、90°混頻器,偏振分集接收器和光電平衡檢測器等光通信關(guān)鍵器件的工作原理,詳細描述了各器件在光通信系統(tǒng)中的特點。 3.通過深入研究CSRZ-FSK、星形16QAM和APol調(diào)制格式產(chǎn)生的原理,建立了CSRZ-FSK、星形16QAM和APol調(diào)制格式的數(shù)學模型,綜合ASK、 FSK、 PSK和APol調(diào)制技術(shù),從原理上創(chuàng)新性地提出并建立了CSRZ-FSK-16QAM-APol新型調(diào)制格式的發(fā)射機模型。 4.采用分段分步傅立葉(SSFM)數(shù)值方法求解非線性薛定諤方程(NLSE),對光纖信道的傳輸損耗、色度色散、偏振模色散和非線性效應(yīng)等特性進行了數(shù)學描述；通過MATLAB m語言編程和Simulink仿真,建立了基于數(shù)學描述的標量和矢量形式的光纖信道仿真模型。 5.通過分析APol、星形16QAM和CSRZ-FSK信號解調(diào)原理,從90°混頻器、偏振分集接收器和光電平衡檢測器的原理年入手,詳細描述了經(jīng)過接收機解調(diào)還原基帶信號的整個過程。 6.通過仿真CSRZ-FSK-16QAM-APol新型調(diào)制格式光信號的產(chǎn)生、通過標量和矢量光纖信道和接收解調(diào)整個過程,得到該光纖通信系統(tǒng)各關(guān)鍵點上的信號波形和星座圖,以及信號傳輸?shù)恼`比特率(BER)等,并以此為依據(jù)深入分析CSRZ-FSK-16QAM-APol新型調(diào)制格式光信號的各種性能,對該新型調(diào)制格式信號的傳輸質(zhì)量和傳輸效能進行了評估。 7.結(jié)果表明,CSRZ-FSK-16QAM-APol新型調(diào)制格式信號提高了對光纖信道色散和非線性效應(yīng)的容忍度,提高了系統(tǒng)的頻帶利用率、傳輸速率和傳輸容量,并且使得原本單一調(diào)制實現(xiàn)起來非常困難的技術(shù)得到了良好的優(yōu)勢互補,產(chǎn)生出1+12的獨特效果。
[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.

【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN761

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