基于DSP的FIR数字滤波器的设计与实现.doc

淮北师范大学 2011届学士学位论文 基于DSP的FIR数字滤波器的 设计与实现 学院、专业 物理与电子信息学院  电子信息工程 研 究 方 向 数字信号处理 学 生 姓 名 桑 建 军 学 号 20070403036 指导教师姓名 周 建 芳 指导教师职称 讲 师 2011年04月28日 基于DSP的FIR数字滤波器的设计与实现 桑建军 淮北师范大学物理与电子信息学院235000 摘要 数字滤波器是数字信号处理中最重要的组成部分之一，数字滤波器由数字乘法器、加法器和延时单元组成的一种算法或装置ealization of FIR digital filter Based on DSP Sang Jianjun Department of Physics and Electronic information , Huai Bei Normal University 235000 Abstract A digital filter, which is one of the most important parts of digital signal processing, is an algorithm or a device made of digital on time-multiplier, adder and delay of elements. It can be used to be the pretreatment of signal by application program. The FIR digital filter Based on DSP has many features ,such as uninfluenced ,high accuracy ,good stability and highly flexible .The digital filter is widely used in fields of speech image processing, digital communication, spectrum analysis, pattern recognition and automatic control, etc. It will has broad space for development. This paper firstly introduces the concept of digital filter ,classification, and the realization method of digital filter. On the basis of understanding FIR filters working principle and design method , we use rectangular window to realize the design of FIR low-pass filters under the MATLAB environment. Then ,making the design of FIR digital low-pass filters come true through programming by combination of the DSP and CCS2.0. The simulation results show that the filter based on DSP realizing have good stability, high precision, flexibility,etc, and can also realize real-time filtering. Key words FIR digital filter；DSP；Window method；MATLAB；TMS320C5402 目 次 1 引言 1 1.1 数字滤波器的概念 1 1.2 数字滤波器的分类 1 1.3 数字的滤波器的发展及其优越性 2 1.4 数字滤波器的实现方法 2 2 FIR数字滤波器的设计原理及MATLAB的实现 4 2.1 FIR数字滤波器的基本网络结构