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摘 要
本文分析了FIR数字滤波器的基本结构和线性相位FIR数字滤波器的条件与特点，
介绍了FIR数字滤波器的设计原理、性能指标以及滤波器的分析设计工具FDATool，提出了如何利用窗函数法、频率采样法和切比雪夫逼近法设计FIR数字滤波器。对比了利用窗函数法、频率采样法和切比雪夫逼近法设计的FIR数字滤波器的性能指标，其中切比雪夫逼近法是一种优化设计法，它克服了窗函数和频率采样法的缺点，使最大误差最小化，并在整个逼近频段上均匀分布。
关键词：FIR数字滤波器；窗函数法；频率采样法；切比雪夫逼近法；MATLAB仿真设计；
第1个回答 2010-12-24
Abstract
This paper analyzes the basic structure of FIR digital filter and linear phase FIR digital filter conditions and characteristics,
Introduced the principle of FIR digital filter design, performance indicators and filter analysis and design tools FDATool, how to use the window function proposed method, frequency sampling method and Chebyshev design of FIR digital filter approximation method. Compared the use of window functions, frequency sampling method and the Chebyshev approximation of FIR digital filter design performance indicators, including Chebyshev approximation method is an optimal design method, which overcomes the sampling window function and the frequency of the shortcomings of That minimize the maximum error, and evenly distributed throughout the band approximation
This paper analyzes the basic structure of FIR digital filter and linear phase FIR digital filter conditions and characteristics,
Introduced the principle of FIR digital filter design, performance indicators and filter analysis and design tools FDATool, how to use the window function proposed method, frequency sampling method and Chebyshev design of FIR digital filter approximation method. Compared the use of window functions, frequency sampling method and the Chebyshev approximation of FIR digital filter design performance indicators, including Chebyshev approximation method is an optimal design method, which overcomes the sampling window function and the frequency of the shortcomings of That minimize the maximum error, and evenly distributed throughout the band approximation
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