MATLAB载波同步的分析与电路设计+程序代码
关键词：载波同步，锁相环，matlab
毕业论文设计说明书（论文）外文摘要
Title Analysis and circuit design of carrier synchronization
Abstract
With nearly twenty years of rapid development of communication industry, synchronization technology becomes more and more important.Synchronization plays an irreplaceable role in the communication system, directly affects the realization and the quality of the received signal.Synchronization is a necessary condition for the transmission of information in a communication network, different systems and different to the synchronization requirements, implementation and solutions are also different, this will give the synchronous data communication platform with the ability to put forward higher requirements. In this paper, the introduction of carrier synchronization research background, development status and research significance, and puts forward the main tasks and the structure of this article.Then introduces the theory and technology of synchronization, synchronization concept, implementation method basic principle, performance index of the corresponding introduction.The paper also gives a method to extract synchronization carrier: COSTAS PLL. Further analysis of the working principle of COSTAS bad road, and the main sub module are introduced and designed in detail, and the simulation of the MATLAB, the simulation results show that the synchronization algorithm simplifies the demodulation process, reduces the calculation amount, good anti-interference performance.
Keywords ： carrier synchronization, COSTAS loop, matlab
目 次
1 绪论 1
1.1 研究的背景及意义 1
1.2 国内外研究现状 1
1.3 本文主要工作 2
2.1 载波同步的概念 3
2.1.1 直接法 3
2.1.2 插入导频法 5
2.2.1 相位误差 7
2.2.2 同步建立时间和保持时间 9
2.3 载波同步频移产生的原因 10
3.1 锁相环的工作原理 11
3.1.1 鉴相器 11
3.1.2 环路滤波器 12
3.1.3 压控振荡器 12
3.2 COSTAS环的工作原理 12
3.3 锁相环的噪声分析 14
3.3.1 锁相环的输入噪声 14
3.3.2 压控振荡器的噪声 15
3.3.3 相位噪声的抑制 16
4.1 任务要求 18
4.2 程序代码 19
4.3 仿真结果 20
结 论 23
致 谢 24
参考文献25
1 绪论