1 绪论................................................................... 1
1.1 数字滤波器的优点 ....................................................................................................... 2
1.2 数字滤波器的发展概况 ................................................................................................ 3
1.3 开发工具 ..................................................................................................................... 4
1.3.1 MATLAB 软件简介········································································································ 4
1.3.2 MATLAB 特点 ············································································································· 5
2 数字滤波器理论研究 .................................................... 6
2.1 滤波器的设计................................................................................................................ 6
2.2 数字滤波器的定义 ....................................................................................................... 7
2.3 滤波器的设计步骤......................................................................................................... 8
2.4 数字滤波器的类型......................................................................................................... 8
2.5 滤波器的选择................................................................................................................ 9
2.5.1 FIR 和 IIR 数字滤波器的比较····················································································· 9
2.5.2 FIR 或 IIR 滤波器的选取原则··················································································· 10
2.6 数字滤波器的实现方法................................................................................................ 10
3 IIR 滤波器的设计 ....................................................... 11
3.1 数字滤波器 ....................................................................................................................11
3.2 IIR 数字滤波器设计方法 ............................................................................................. 12
3.2.1 用脉冲相应不变法设计 IIR 数字滤波器 ······································································ 13
3.2．2 用双线性变换法设计 IIR 数字滤波器······································································ 15
4 IIR 数字带通滤波器设计过程 ............................................ 18
4.1 设计步骤： ................................................................................................................. 18
4.2 程序流程框图： .......................................................................................................... 19
4.3 MATLAB 程序：............................................................................................................. 19
结论..................................................................... 22
参考文献................................................................. 23
致谢..................................................................... 24
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