SystemView与MATLAB在数字滤波中的应用设计.doc

System View与MATLAB在数字滤波中的
应用设计
摘要：数字滤波器是数字信号处理的重要基础，在通信系统、数字仪器仪表、语音、图像处理等方面都是必不可少的部分。文章利用MATLAB和System View两款仿真软件为工作平台和开发工具，将二者结合起来用于FIR（有限冲激响应）数字滤波器和椭圆模拟滤波器的仿真实现。本文给出了FIR（有限冲激响应）数字滤波器和椭圆模拟滤波器的MATLAB和System View仿真实例，目的是对数字滤波器和模拟滤波器的设计方法和性能特点进行简单的比较，说明数字滤波的优势。另外，论文结合抽样定理的System View实现，验证了抽样定理的正确性，且说明了滤波器在在抽样定理中的作用。仿真结果表明，数字滤波器的设计需要借助成熟的模拟滤波器设计思想，但设计出的数字滤波器具有比模拟滤波器更高的精度，能够实现模拟滤波器在理论上无法达到的性能。而利用MATLAB和System View设计的滤波器能够达到滤波器指标要求，且设计过程简单易行,具有一定的实用价值。
通过数字滤波器的MATLAB和System View仿真实现，可以看到MATLAB和System View都是非常方便实用的仿真软件，在现今的教学和软件设计中起到举足轻重的作用。
关键词：System View；MATLAB；数字滤波器；滤波器设计；仿真
Application of digital filter design based on
System View and MATLAB
ABSTRACT ：MATLAB and System View as the platform and development tool in this paper. MATLAB and System View be used for design and implementation of filter that the Finite Impulse Response (FIR) filter and elliptic analog filter. Through MATLAB language design Finite Impulse Response (FIR) digital low-pass filter based on the window functions methods, and investigate the window functions methods about filter design. Take elliptic analog filter as an example, introduce how to use the toolbox functions. This paper use the System View realize Finite Impulse Response (FIR) digital filter and elliptic analog filter, show the method of System View design filter. Implementation of sampling theorem in System View, verify the accuracy of sampling theorem, and shows the effects of filter in the sampling theorem.
The simulation results show that design results can meet the requirements very well，and the design procedures simple and practical. Using MATLAB and System View can be compared design requirements and filter characteristics anytime, its can be adjust the parameters of the corresponding, intuition and simple.
MATLAB and System View used in digital filter design that greatly reduces the workload of technical staff, in particular, the workload from computational. so technicians have mor