基于DSP的IIR数字滤波器的设计

范文编号:TX208 范文字数:6167,页数:20

摘　要
数字滤波器在各种数字信号处理中发挥着十分重要的作用，数字滤波器设计一直是信号处理领域的重要研究课题。常用的数字滤波器有FIR滤波器和IIR滤波器,其中IIR数字滤波器因具有结构简单、占用存储空间少、运算速度快、较高的计算精度和能够用较低的阶数实现较好的选频特性等特点[1]，得到了广泛应用。DSP芯片有适合于数字信号处理的软件资源和硬件资源，是实现数字信号处理的重要途径[2]。目前所见文献，多数为滤波器的模型设计，所得结果也是在MATLAB等实验环境下模拟仿真完成的，带有很大的局限性。本文讨论IIR数字滤波器在DSP上的实现思路，并对其实现方法进行了分析。该范文叙述了IIR数字滤波器的设计原理及其在DSP上的实现思路，并对用DSP实现IIR数字滤波的方法进行了分析。用MATLAB计算出IIR数字滤波器的系数，考虑到溢出问题，采用级联的形式对滤波器进行分解，最后在TMS320VC5416 DSP上得以实现，并通过CCS(come composer studio)的输入输出功能和RTDX(real-time data exchange)的功能保证实现结果和仿真结果的一致性。
关键字：DSP  Matlab  IIR

Abstract
Digital filter in digital signal processing of various plays very important role in design, digital filter is an important research field of signal processing. Common digital filter has FIR filters and IIR filter, including IIR digital filter is occupied by simple structure, less storage space, faster, higher precision and can be used for realization of low frequency characteristics choose good characteristics [1], the widely used. DSP is suitable for digital signal processing software and hardware resources, is the resource of the realization of digital signal processing is an important way to [2]. Currently, most of which saw filters, model design results in MATLAB simulation experimental environment etc, with great limitations. Based on DSP IIR discussion on digital filter, and the realization of its realization methods are analyzed. This paper describes the design principle of IIR digital filter and the realization of digital signal processor (DSP), and the realization of digital filtering IIR DSP methods are analyzed. MATLAB IIR calculated the digital filter coefficients, considering the overflow problems, using a cascade of filter decomposition, finally realized in the TMS320VC5416 DSP and come by CCS (composer studio) input and output functions and RTDX (real data exchange) - time function ensure the consistency of the results and simulation results.

Keyword: DSP  Matlab  IIR

目录
摘　要 I
Abstract II
第1章 绪论 1
1.1 课题来源 1
1.2 课题特点及意义 1
1.3课题内容 2
1.4课题实现方法 2
第2章 概要设计 4
2.1基于DSP数字滤波器系统框图 4
2.2 IIR数字滤波器的MATLAB实现 4
2.3 模/数接口设计 5
2.3基于DSP的数字滤波器的设计 6
第3章 详细设计 8
3.1 IIR数字滤波器的MATLAB设计 8
3.2 基于DSP的IIR滤波器设计 9
第4章 仿真结果 12
4.1 输入波形图 12
4.2 输出波形图 13
参考文献 14
致谢 15

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