基于广义频分复用的调制解调系统.docVIP

基于广义频分复用的调制解调系统 摘要：2009年德国5GNOW项目组提出了广义频分复用（Generalized Frequency Division Multiplexing，GFDM）技术作为5G通信的候选技术。它是由OFDM衍生而来。其本质是一种采用非矩形脉冲成型的多载波调制系统，利用循环卷积在频域上实现DFT滤波器组结构。GFDM具有综合性的优点，但带外衰减性能、误比特率性能和峰值平均功率比等诸多性能上还有一定的缺陷，同时它比其他系统在计算上更复杂。目前正处在火热的研究中。 本文首先综述了国内外关于GFDM的相关研究现状，从中提取相关理论及设计实验方法，形成相关的理论概述。在理论概述部分，重点阐述了GFDM的系统模型以及与OFDM之间的差异。并核算了其PAPR。在设计部分，通过理论研究使用两种算法设计了其调制解调系统，并用matlab软件进行仿真测试，对测试结果进行了讨论和评估，最后提出了若干调高其各方面性能的设计建议。 关键词：5G通信；广义频分复用；峰均功率比 Modulation and Demodulation System Based on Generalized Frequency Division Multiplexing Abstract: 2009 German 5GNOW project team proposed a generalized frequency division multiplexing (GFDM) technology as a 5G communication candidate technology. It is derived from OFDM. Its essence is a multi-carrier modulation system with non-rectangular pulse shaping, and the structure of DFT filter bank is realized by cyclic convolution in frequency domain. GFDM has a comprehensive advantage, but the out-of-band attenuation performance, bit error rate performance and peak average power ratio and many other performance there are some flaws, and it is more complicated than other systems in the calculation. Is currently in a hot study. This paper first summarizes the current research situation of GFDM at home and abroad, and draws the relevant theory and design experiment method to form the relevant theoretical overview. In the part of the theory, the paper introduces the system model of GFDM and the difference with OFDM. And its PAPR is calculated. In the design part, through the theoretical research using two algorithms to design its modulation and demodulation system, and use matlab software simulation test, the test results were discussed and evaluated, and finally put forward a number of aspects of its performance recommendations. Key words: 5G communication; generalized frequency division multiplexing; peak-to-average power ratio 目 录 1引言 1 1.1 研究背景 1 1.2 研究方法 2 1.2.1 文献研究法。 2 1.2.2 理论分析法。 2 1.2.3 仿真法 2 1.3 研究工具 2 1.4 研究意义 3 1.4.1 理论意义 3 1.4.2