基于MATLAB的FIR数字带通滤波器的设计研究
关键词 滤波器 FIR 窗函数 MTALAB 滤波器系数
毕业设计说明书（论文）外文摘要
Title DESIGN AND RESEARCH of FIR DIGITAL BANDPASS FILTER BASE ON MATLAB
Abstract
Since the development of human society, technological innovation continue to make breakthroughs. In the wireless communications industry, communications technology is moving digital, intelligent, humane direction, which played a filter can be described as tripartite balance of power. In this paper, using MATLAB software to design and simulate FIR band-pass filter through the window function method, frequency sampling method, Chebyshev approximation method, as well as MATLAB toolbox FDATool comes to design, and gives the specific implementation and parameters. According to the structure of different filters and then analyzed and discussed similarities and differences between the direct, cascade, frequency sampling type structure. Meanwhile, the specific implementation of the filter coefficients of the number of bits used, and the effects of rounding brought analyzed. Finally, we summarize the main problems encountered in the design process and solutions.
Keywords Filter FIR window function filter coefficients
目 次
1 绪论 1
1.1 滤波器的发展与前景 1
1.2 滤波器的分类 1
1.3 FIR滤波器的设计和实现 2
2 FIR数字滤波器的特性 4
2.1 FIR滤波器的相位特性 4
2.2 FIR滤波器的幅度特性 5
3 基于MATLAB的程序设计 7
3.1 窗函数法 7
3.2 频率采样法 16
3.3 切比雪夫逼近法 18
3.4 MATLAB工具箱FDATool设计 19
3.5 最小二乘法 22
3.6 本章小结 24
4 FIR数字带通滤波器的实现与讨论 25
4.1 结构的选择 25
4.2 对滤波器系数量化的讨论 26
4.3 舍入的影响 31
4.4 本章小结 33
5 运用Simulink仿真实现 34
6 FIR滤波器的其他实现途径 37
7 设计中遇到的问题和解决办法 40
结 论 41
致 谢 42
参考文献43
1 绪论
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