基于高阶QAM的高光谱高效光通信系统
发布时间：2023-03-03 20:02
近年来,随着互联网产业的快速发展,移动物联网、大数据和云计算等数据业务的爆炸式增长使得传输容量面临不断扩容的压力。日益增长的光网络互联应用需求使得提高光网络的容量和频谱效率(SE)成为一项艰巨的任务。用先进的调制格式和相干技术取代现有的诸如强度和开关键控(OOK)调制格式等通信系统技术,已成为一种发展趋势。本文提出了一种利用高阶QAM的高光谱效率光通信系统及相干检测方案。该方案为高阶QAM和脉冲整形技术的相干光通信系统,采用了偏振复用(Pol-Mux)和光检测器灵敏度提高的相干零差接收机。此外,一种新的均衡补偿方法的数字信号处理单元被用于光谱高效光通信系统中。本文的工作总结如下:1)首先,研究了一种梯形脉冲整形的高阶QAM信号生成方案。讨论了具有梯形脉冲整形的128-QAM和256-QAM等高阶QAM及其仿真结果和优点。信号经过了梯形脉冲整形和偏振多路复用后,在长度超过80km的光纤中传输仿真。对于采用了梯形光学滤波的脉冲整形128 QAM的情况,信号在超过80 km光纤单通道上传输带宽280 Gbit/s,结果显示该方案的功耗最小、误码率最低。2)其次,在接收端设计了采用InGaAs...
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
abstract
摘要
DEDICATION
List of Abbreviations
Chapter 1: Introduction
1.1 Background of Research & Significance
1.2 Research Status
1.3 Challenges and Goals
1.4 Research Work
1.5 Report Layout
Chapter 2: Theoretical Fundamentals
2.1 Brief History of Fiber-Optic Communications
2.2 Motivations for Advanced Modulation Formats
2.2.1 Differential Phase Shift Keying (DPSK)
2.2.2 Differential Quadrature Phase Shift Keying(DQPSK)
2.2.3 Polarization Multiplexing (Pol-MUX)
2.2.4 WDM and OTDM
2.3 Study of Higher Order QAM
2.4 Study of Polarization Multiplexing
2.5 Principles of Coherent Optical Communication
2.5.1 Homodyne Detection (HMD-D)
2.5.2 Heterodyne detection (HMD-D)
2.6 DSP Based Coherent Transceivers
2.7 Summary
Chapter 3: The Scheme for Higher Order QAM Signal Generation and Pulse Shaping
3.1 The Scheme of Higher Order QAM Signal Generation and Pulse Shaping
3.1.1 Simulation Setup of The Model
3.1.2 Trapezoidal Pulse Shaping of the QAM Signal
3.1.3 Modulation and Multiplexing of QAM Signal
3.2 Simulation Results of The Scheme
3.2.1 Simulation Results and Analysis of 128-QAM with Pulse Shaping
3.2.2 Simulation Results and Analysis of 256-QAM with Pulse Shaping
3.3 Summary
Chapter 4: Coherent Detection and Processing of Signal in DSP
4.1 The Scheme for Coherent Detection with InGaAs Waveguide
4.2 Theoretical Analysis of The Coherent Detection Scheme
4.3 Performance Analysis of QAM Based Homodyne Detection
4.4 Simulation Results and Analysis
4.5 Summary
Chapter 5: Conclusion and Future Directions
5.1 Conclusion
5.2 Future Directions
Chapter 6: References
ACKNOWLEDGEMENT
本文编号：3753021
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
abstract
摘要
DEDICATION
List of Abbreviations
Chapter 1: Introduction
1.1 Background of Research & Significance
1.2 Research Status
1.3 Challenges and Goals
1.4 Research Work
1.5 Report Layout
Chapter 2: Theoretical Fundamentals
2.1 Brief History of Fiber-Optic Communications
2.2 Motivations for Advanced Modulation Formats
2.2.1 Differential Phase Shift Keying (DPSK)
2.2.2 Differential Quadrature Phase Shift Keying(DQPSK)
2.2.3 Polarization Multiplexing (Pol-MUX)
2.2.4 WDM and OTDM
2.3 Study of Higher Order QAM
2.4 Study of Polarization Multiplexing
2.5 Principles of Coherent Optical Communication
2.5.1 Homodyne Detection (HMD-D)
2.5.2 Heterodyne detection (HMD-D)
2.6 DSP Based Coherent Transceivers
2.7 Summary
Chapter 3: The Scheme for Higher Order QAM Signal Generation and Pulse Shaping
3.1 The Scheme of Higher Order QAM Signal Generation and Pulse Shaping
3.1.1 Simulation Setup of The Model
3.1.2 Trapezoidal Pulse Shaping of the QAM Signal
3.1.3 Modulation and Multiplexing of QAM Signal
3.2 Simulation Results of The Scheme
3.2.1 Simulation Results and Analysis of 128-QAM with Pulse Shaping
3.2.2 Simulation Results and Analysis of 256-QAM with Pulse Shaping
3.3 Summary
Chapter 4: Coherent Detection and Processing of Signal in DSP
4.1 The Scheme for Coherent Detection with InGaAs Waveguide
4.2 Theoretical Analysis of The Coherent Detection Scheme
4.3 Performance Analysis of QAM Based Homodyne Detection
4.4 Simulation Results and Analysis
4.5 Summary
Chapter 5: Conclusion and Future Directions
5.1 Conclusion
5.2 Future Directions
Chapter 6: References
ACKNOWLEDGEMENT
本文编号：3753021
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