基于DSP Builder的FIR数字滤波器的仿真设计.doc

数字信号处理课程设计
题目:基于DSP Builder的FIR数字滤波器的仿真设计
姓名:
专业:电子信息工程
班级: 08级3班
院系:信息科学与工程学院
入学年度:2008年
指导教师:
日期: 2011年3月13日
基于DSP Builder的FIR数字滤波器的仿真设计
摘要:数字滤波器是数字信号处理中的核心环节,而FIR数字滤波器因其具有严格的线性相位,系统总是稳定等特点而广泛应用于数字信号处理的各个领域,因此是一个重要的研究课题。随着微电子技术的发展,数字信号处理得到了飞速发展。数字滤波器是谱分析、雷达信号处理、通信信号处理应用中的基本处理算法,在数字音频、图像处理、数据传输、生物医学等领域得到了广泛应用。
本文内容包括FIR数字滤波器的网络结构、线形相位条件和特点以及设计方法、基于MATLAB/Simulink的DSP设计技术、详细的设计流程向导、ModelSim仿真等。本文通过一个设计实例,提出了一种采用DSP Builder实现有限冲激响应滤波器的设计方案,并以一个24阶低通数字滤波器的实现为例,设计并完成软件仿真与验证。
通过仿真与验证,本系统所设计的数字滤波器能够成功运行,且所设计滤波器稳定性好,精确度高,不易受环境影响。在利用FPGA进行数字滤波器的开发时,采用基于Matlab环境的DSP Builder作为设计工具可以更方便的建立模型,完成整个设计。
关键词:MATLAB;数字滤波器;DSP Builder;仿真
The Design Of The FIR Digital Filter
Based On DSP Builder
Abstract: Digital filter algorithm is one of the core techniques in signal processing. The FIR digital filter has been widely used in signal processing field because of its strict linear phase and stability. With the development of microelectronics technology, digital signal processing has made rapid development. Digital filter is the basic processing algorithms in respect of spectral analysis, radar signal processing munications signal processing applications, and receive widely application at the field of digital audio, Image processing, data transmission and biomedical etc.
This content includes FIR digital work structure, linear-phase conditions, characteristics, design methods, DSP design technology of MATLAB-based, detailed design flow guide and ModelSim simulation and so on. This paper posed a design example through using the DSP Builder realize Finite Impulse Response Filter plete hardware design simulation and verification as an example by the realization of 24-step low-pass digital FIR filter.
Through simulation and verification, the system of the digital filter designed can run essfully, and the designed filter has good stability, high accuracy, less susceptible to environmental impacts. In the use of FPGA for the development of digital filters using Matlab-based