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西安欧亚学院

本科毕业论文（设计）

题 目： GSM移动通信系统中低通滤 波器的设计与仿真

GSM移动通信系统中低通滤波器的设计与仿真

摘要：本文应用MATLAB软件中的Simulink平台分别研究了FIR数字低通滤波器和IIR数字低通滤波器的设计方法和实现方法，并进行模拟仿真设计，以显示本文所介绍数字低通滤波器的多种特性。

在无限脉冲响应（IIR）数字低通滤波器设计中，应用了冲击响应不变法和双线性Z变换法，先进行模拟滤波器的设计，然后把模拟滤波器转换为数字滤波器，最后进行滤波器的频带转换，使用MATLAB软件按两种方法编辑程序并通过图形展示IIF低通滤波器的各种参数和性能指标。在有限脉冲响应（FIR）低通数字滤波器设计中，讨论了FIR线性相位滤波器的特点和用窗函数法设计FIR滤波器两个问题。这两类低通滤波器整个设计过程都是按照理论分析、编程设计、模拟仿真、具体实现的步骤进行的。

关键词：数字低通滤波器、MATLAB、Simulink

GSM mobile communication system design and simulation of the

low-pass filter

Abstract：In this paper, the application of MATLAB software Simulink platform respectively studied the FIR digital low-pass filter and IIR low-pass filter design methods and implementation method, and carries on the simulation design,to display a variety of characteristics of digital low-pass filter, presented in this paper.

In infinite impulse response (IIR) digital low-pass filter design, the application of shock response is not political reform and bilinear z-transform method, first for the design of analog filter, then converted to a digital filter, the analog filter to filter the frequency conversion, using MATLAB software according to the two methods of editing program and through the graphic display of IIF low-pass filter parameters and performance indicators. In finite impulse response (FIR) low-pass digital filter design, discussed the characteristics of the FIR linear phase filter and FIR filter with window function method with two problems. These two types of low-pass filter the whole design process is in accordance with the theoretical analysis, programming design, simulation and implementation steps.

Keywords: digital low-pass filter, the MATLAB, Simulink,