微波光子QAM信号产生方法研究

发布时间：2018-06-20 17:37

  本文选题：微波光子学 + 微波光子移相器　； 参考：《南京航空航天大学》2014年硕士论文

【摘要】：随着未来宽带、超宽带通信技术的发展,信号的采样率将不断提高,信号传输带宽激增,现有基于电子信号处理的通信系统受“电子瓶颈”的限制,面临巨大的挑战。与传统的电学系统相比,微波光子系统工作频率高、带宽大、长距离传输损耗小且抗电磁干扰能力强,其将是这些挑战的有效解决方法之一,因而更加受到青睐。正交振幅调制(QAM)由于其频谱利用率高、调制/解调设备简单而在实际通信系统中被广泛应用,研究基于微波光子技术的QAM信号产生方法有着重要的实用价值。本文的主要工作如下:第一章论述了QAM调制信号及其发展历史,对光学方法产生QAM信号和光载无线通信系统的研究意义和发展现状进行了阐述,并概述本文主要研究内容。第二章总结分析了微波光子QAM信号产生仿真和实验中所需的器件。首先介绍了强度调制器、相位调制器、偏振调制器和马赫增德尔调制器等几种光电调制器;然后,对半导体光放大器、掺铒光纤放大器和拉曼放大器等几种光放大器进行了总结与性能分析;最后,简要介绍了激光器、光纤等其他常用元器件。第三章在分析QAM信号调制原理的基础上,研究了基于微波光子并联强度调制和并联偏振调制的QAM信号产生方案,对基于强度调制的4QAM和16QAM信号产生以及基于偏振调制的4QAM信号产生方案进行了理论分析和仿真验证,OptiSystem软件仿真结果分析证明了方案的有效性。第四章分析了上述方案的实验验证平台的结构组成及其实测结果。首先对基于偏振调制的微波光子移相器进行了理论推导和分析,并对实验验证系统进行了详细的介绍,在实验室现有条件下完成了基于强度调制的4QAM信号的产生、传输和解调等方面的工作,实验结果验证了该方案的正确性及其潜在的应用优势。第五章结束语对全文的工作进行了总结,并指出了下一步的研究方向。
[Abstract]:With the development of future broadband and ultra wideband communication technology, the sampling rate of signal will be improved continuously, the bandwidth of signal transmission is increasing. The existing communication system based on electronic signal processing is subject to the limitation of "electronic bottleneck", which is faced with great challenge. Compared with the traditional electrical system, the micro wave optical subsystem works with high frequency, large bandwidth and long distance transmission. Because of its low loss and strong ability to resist electromagnetic interference, it will be one of the most effective solutions to these challenges. Therefore, orthogonal amplitude modulation (QAM) is widely used in the actual communication system because of its high frequency spectrum utilization and simple modulation / demodulation equipment. It is important to study the QAM signal generation method based on the microwave photon technology. The main work of this paper is as follows: in the first chapter, the QAM modulation signal and its development history are discussed. The research significance and development status of the QAM and optical wireless communication systems produced by optical methods are expounded, and the main contents of this paper are summarized. The second chapter summarizes and analyzes the simulation and experiment of the generation of microwave photon QAM signals. The required devices. First, several photoelectric modulators, such as intensity modulator, phase modulator, polarization modulator and Machka Del modulator, are introduced. Then, several optical amplifiers, such as semiconductor optical amplifier, erbium doped fiber amplifier and Raman amplifier, are summarized and analyzed. Finally, the laser, fiber and so on are briefly introduced. In the third chapter, on the basis of the analysis of the principle of QAM signal modulation, the QAM signal generation scheme based on the microwave photonic parallel intensity modulation and parallel polarization modulation is studied. The 4QAM and 16QAM signal generation based on the intensity modulation and the 4QAM signal production scheme based on the polarization modulation are theoretically analyzed and verified, Opt The analysis of iSystem software simulation results proves the effectiveness of the scheme. In the fourth chapter, the structure and the measured results of the experimental verification platform are analyzed. Firstly, the theoretical deduction and analysis of the polarization modulation based microwave photonic phase shifter are carried out, and the experimental verification system is introduced in detail, and the existing conditions in the laboratory are given. The results of the intensity modulation based 4QAM signal generation, transmission and demodulation are completed. The experimental results verify the correctness and potential application advantages of the scheme. The end of the fifth chapter summarizes the work of the full text, and points out the direction of the next step.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.3
，

本文编号：2045130