發(fā)布時(shí)間：2023-02-27 18:00

　　隨著互聯(lián)網(wǎng)、移動(dòng)互聯(lián)網(wǎng)的飛速發(fā)展,人類對信息的需求急劇膨脹,互聯(lián)網(wǎng)流量一直處于爆炸式增長,越來越多視頻流以及云計(jì)算、社交媒體和移動(dòng)數(shù)據(jù)傳輸?shù)葘饫w通信系統(tǒng)網(wǎng)絡(luò)規(guī)模、通信速率、通信容量、通信距離等提出了更高的要求,使其正朝著超高速率、超長距離、超大容量和超高頻譜效率的方向發(fā)展。調(diào)制格式從使用傳統(tǒng)的開關(guān)相移鍵控(OOK)逐步向更高階的調(diào)制格式過渡。為了滿足日益增長的通信容量需求,本文對光通信中所用到的先進(jìn)調(diào)制格式展開了研究。本論文的主要研究內(nèi)容為:1)設(shè)計(jì)了一種雙偏振高階調(diào)制格式信號產(chǎn)生方案,仿真分析了發(fā)射功率,傳輸距離及光信噪比等因素對DP-QPSK,DP-16QAM及DP-32QAM信號傳輸性能的影響。2)分析了不同類型的星座圖性能,包括圓形16QAM、方形16QAM圓及2A8P-16QAM調(diào)制信號信噪比和誤碼率關(guān)系。同時(shí),分析了交叉形32QAM、矩形32QAM和4A8P-32QAM性能。結(jié)果表明,隨著信噪比的增加,誤碼率降低。3)研究了通過在相干接收機(jī)處使用偏振解復(fù)用,色散補(bǔ)償,頻率和載波相位估計(jì)來減少極化失配和信道損傷的影響。此外,闡述了在這種信道損傷下的最佳QoS參數(shù)值,如不同波...

【文章頁數(shù)】：58 頁

【學(xué)位級別】：碩士

【文章目錄】：
abstract
摘要
DEDICATION
List of Abbreviations
Chapter1：Introduction
    1.1 Background and Significance of the Study
    1.2 Research Status
    1.3 Challenges and Goals
    1.4 Research Content
        1.4.1 Higher order modulation in different Constellation
        1.4.2 Dual polarization Modulation scheme
        1.4.3 Polarization Mismatch effects
    1.5 Thesis Outline
Chapter2：Coherent Optical Fiber Communication
    2.1 Overview
    2.2 Coherent Detection Principles
        2.2.1 Heterodyne Detection
        2.2.2 Homodyne Detection
        2.2.3 Phase Diversity Detection
    2.3 Higher Order Modulation
        2.3.1 Dual Polarization Modulation Formats
        2.3.2 Quadrature Phase Shift Keying
        2.3.3 Quadrature Amplitude Modulation
    2.4 Dispersion Compensation and non-linear impairments
    2.5 Summary
Chapter3：Analysis of High Order Modulation Formats in Coherent OpticalCommunication System
    3.1 Introduction
    3.2 Scheme of DP-QPSK based on coherent optical receiver
    3.3 Scheme of DP-m QAM based on coherent optical receiver
    3.4 Performance analysis
        3.4.1 Different Constellations of 16QAM
        3.4.2 Performance of OSNR vs BER for 16QAM
        3.4.3 Different constellations of 32QAM
        3.4.4 Performance of OSNR vs BER for 32QAM
    3.5 Summary
Chapter4：Polarization mismatch effect in DP-16 QAM and DP-QPSK
    4.1 Introduction
    4.2 Effect of Polarization Mismatch on System Performance
    4.3 Compensation for channel impairment
    4.4 Summary
Chapter5：Conclusion and Future Work
    5.1 Conclusion
    5.2 Future Work
References



本文編號：3751189