基于DSP的IIR滤波器系统设计 毕业论文.docx

基于DSP的IIR滤波器系统设计 摘要：DSP数字信号处理(Digital Signal Processing，简称DSP)是一门涉及许多学科而又广泛应用于许多领域的新兴学科。DSP 芯片是一种特别适合数字信号处理运算的微处理器，主要用来实时、快速地实现各种数字信号处理算法。用DSP 芯片实现IIR 数字滤波器，不仅具有精确度高、不受环境影响等优点，而且因DSP 芯片的可编程性，可方便地修改滤波器参数，从而改变滤波器的特性，设计十分灵活。 本课题主要应用DSP集成开发环境——CCS调试汇编程序，主要结合TMS320C54x的结构特点，介绍了一种IIR滤波器在TMS320C54x中的实现方法。文中程序已经过硬件验证，仿真结果表明该设计符合要求。 关键词：数字滤波；无限 HYPERLINK /view/1176449.htm \t _blank 脉冲响应滤波器；数字信号处理器；TMS320C54x 中图分类号：TN911120 文献标志码：A DSP-based IIR filter system design Lihuanhuan (1. Department of Electronic and Information Engineering ,Liaoning University of Technology, Hudao,Liaoning 125100, China) Abstract:DSP Digital Signal Processing (Digital Signal Processing, referred to as DSP) is one involving many disciplines but is widely used in many areas of the emerging discipline. DSP chip is particularly suitable for digital signal processing operations of the microprocessor, is mainly used in real time, quickly achieve a variety of digital signal processing algorithms. Realization of IIR digital filter with a DSP chip, not only has high accuracy, without environmental impact, etc., but also because of a programmable DSP chip, can easily modify the filter parameters, thereby changing the characteristics of the filter, the design is very flexible. The main subject of the application DSP integrated development environment - CCS debugging assembler, the main structural features combined with the TMS320C54x introduces a method of IIR filter in the TMS320C54x. This paper has been hardware verification procedures, simulation results show that the design meets the requirements. Key words: Digital filtering; IIR；DSP；TMS320C54x 前言 随着信息时代和数字世界的到来，数字信号处理已成为当今一门极其重要的学科和技术领域。目前数字信号处理在通信、语音、图像、自动控制、雷达、军事、航空航天、医疗和家用电器等众多领域得到了广泛的应用。在数字信号处理中起着重要的作用并已获得广泛应用的是数字滤波器（DF，Digital?Filter），根据其单位冲激响应函数的时域特性可分为两类：无限冲激响应IIR（Infinite?Impulse?Response）滤波器和有限冲激响应FIR（Finite?Impulse?Response）滤波器。与FIR滤波器相比，IIR的实现采用的是递归结构，极点须在单位圆内，在相同设计指标下，实现IIR滤波器的阶次较低，即所用的存储单元少，从而经济效率高。 1、用 DSP(Digital Signal Proce