基于VHDL的FIR滤波器设计_毕业设计论文.doc

PAGE II PAGE 1 基于VHDL的FIR滤波器设计 摘 要 随着电子技术的快速发展，滤波器已成为人们进行各种信号处理和通信时使用的重要器件，同时滤波器随着电子工业技术的高速发展已经从模拟滤波器时代向数字滤波器时代迈进，出现了数字滤波器与模拟滤波器并存现象，并且数字滤波器有逐步取代模拟滤波器的情况。本论文契合技术的发展，详细讨论并设计实现一种基于VHDL的FIR数字滤波器，该滤波器是数字信号处理系统中最基本的元件，它可以在保证任意幅频特性的同时具有严格的线性相频特性，同时其单位抽样响应为有限长，其特点为：能满足滤波器对幅度和相位特性的严格要求，避免模拟滤波器所无法克服的电压漂移、温度漂移和噪声等问题。论文将针对FPGA器件的特点和VHDL语言的特点，结合MATLAB数学工具软件实现FIR滤波器的功能仿真、程序编辑及编译和最终功能的实现。 关键词：FPGA；VHDL；MATLAB；FIR滤波器 ABSTRACT As the rapid development of electronic technique, filter has become an important device when people use for communication and deal with all kinds of signals. At the same time, with the quick development of electronic industrial technique, filter has already changed from analog filter time to digital filter time, and with a situation that the latter substitute for the former. This dissertation correspond to technological developing, bat around and design a FIR digital filter based on VHDL which is a basic component in digital signal dealing system. It can assure arbitrary amplitude-frequency characteristic, strictly Linear phase frequency characteristics and its unit sample response is finite. Its characteristic is to content filters strict demands with range and phase characteristic and devoid problems of voltage drift, temperature drift, and noise that are beyond analog filters ability. Take FPGA device and VHDL languages character into account and combine with MATLAB mathematical tool software, the papers aim is to achieve FIR filters functional simulation, Programs edits and compiling and its final functions realizing. Key words：FPGA, VHDL, MATLAB, FIR filter PAGE 29 目录 TOC \o 1-3 \h \z \u 第1章 引 言 h 1 1.1 研究背景及课题意义 h 1 1.1.1 数字滤波器 h 1 1.1.2 FIR滤波器 h 1 1.1.3 FIR滤波器的现状 h 2 1.2 国内外研究现状及研究成果 h 2 1.2.1 FIR滤波器国内外的研究现状 h 2 1.2.2 FIR滤波器目前的研究成果 h 3 1.3 本论文实现的基本要求 h 3 第2章 FIR滤波器的硬件方案 h 5 2.1 FIR滤波器的硬件方案 h 5 2.1.1概述 h 5 2.1.2硬件方案比较与选择 h 5 2.1.2硬件方案的确定 h 8 2.2 FPGA简介 h 8 2.2.1 FPGA的背景 h 8 2.2.2 FPGA的工作原理及内部结构图