基于FPGA的波形合成与设计

发布时间：2018-01-26 05:51

本文关键词： DDS 常规波形李萨如图形 SPWM波模拟调制波　出处：《宁夏大学》2017年硕士论文　论文类型：学位论文

【摘要】：由于当今电子技术的快速进步,在一些领域内所需的信号越来越复杂,单一的信号合成已经不能满足人们的需要,为此人们开始关注于一些复杂的信号,以此来满足不同领域的需求。首先,本课题对传统频率合成器以及直接数字频率合成器(DDS)的原理进行了说明,并对它们各自的优缺点进行简要的分析,总结了 DDS的工作特点、频谱分析,并着重对非理想情况下的杂散进行了深入的解析。其次,随着现场可编程门阵列(Field—Programmable Gate Array)的高速发展,人们越来越关注其应用。因此本文对FPGA的发展过程、硬件的开发环境、硬件描述语言(主要是VHDL语言和Verilog HDL语言)以及FPGA的开发流程进行了详细的介绍。本文在深入研究直接数字频率合成技术的基础上,通过VHDL硬件描述语言对DDS的构成部分进行了设计,并且通过DDS技术产生了不同的波形。该技术可以生成正弦波、锯齿波、方波、三角波等四种普通信号,在物理实验室中经常遇见的李萨如图形,电力电子技术中的控制信号SPWM波,以及模拟调制波中的AM、FM、PM波形,并且对各自的工作原理和数学模型进行了详细说明。通过Quartus II软件设计了它们各自的模块并实现模块化,并对各个波形模块进行了仿真。最后,将完成的各个模块下载到FPGA芯片中进行验证。最后,通过对波形合成的验证,以及示波器显示的各种波形形状与其相应的原理产生的波形基本相似,表明了该方案的可行性。
[Abstract]:Due to the rapid progress of electronic technology, the signals needed in some fields are becoming more and more complex, the single signal synthesis can not meet the needs of people, so people begin to pay attention to some complex signals. In order to meet the needs of different fields. Firstly, the principle of traditional frequency synthesizer and direct digital frequency synthesizer (DDS) is explained, and their advantages and disadvantages are analyzed briefly. This paper summarizes the work characteristics of DDS, spectrum analysis, and focuses on the non-ideal case of stray in-depth analysis. Secondly. With the rapid development of Field Programmable Gate Array (Field-Programmable Gate Array). People pay more and more attention to its application. Therefore, this paper discusses the development process of FPGA and the hardware development environment. Hardware description language (mainly VHDL and Verilog HDL). And the development process of FPGA is introduced in detail. This paper deeply studies the technology of direct digital frequency synthesis (DDS). The components of DDS are designed by VHDL hardware description language, and different waveforms are generated by DDS technology, which can generate sine wave, sawtooth wave and square wave. There are four kinds of common signals, such as triangle wave, Lisaru figure, control signal SPWM wave in power electronics and analog modulation wave, which are often encountered in physics laboratory. Their working principles and mathematical models are explained in detail. Their modules are designed and modularized by Quartus II software. Finally, the completed modules are downloaded to the FPGA chip to verify. Finally, through the waveform synthesis verification. All kinds of waveforms displayed by oscilloscope are similar to the corresponding waveforms, which shows the feasibility of the scheme.
【学位授予单位】：宁夏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN791;TN741

【参考文献】