数字滤波器是数字信号处理中最重要的组成部分之一。在许多科学领域中，广泛使用滤波器对信号进行处理。数字滤波器可以分为两种，即有限冲激响应数字滤波器（FIR）和无限冲激响应数字滤波器（IIR）。本文就对有限冲激响应数字滤波器的设计及实现来进行分析和研究。

在FIR滤波器的设计中过程中主要探讨了两个问题，其一是FIR线性相位滤波器的特点及相关公式推导；其二是用窗函数法设计FIR滤波器。在FIR滤波器的整个设计过程都是按照理论分析、编程设计和具体实现的步骤来进行的。

 

『关键词』 数字滤波器  有限冲激响应  Verilog

Digital filter is one of the most important parts of digital signal processing in many fields of science and technology. It is widely used for signal processing. Digital filter can be divided as the Finite Impulse Response digital filter (FIR) and the Infinite Impulse Response digital filter (IIR). The paper aims at respective study in the design and realization of the Finite Impulse Response digital filter.

Two major points are discussed about the design of FIR filters: the characteristics of FIR linear phase filter and the reasoning of related formulas; the other is about the design of the FIR filters by means of window functions. The design of FIR follows the procedures of theoretical analysis, programming design and concrete realization.

 

[Key Words] Digital Filter     FIR      Verilog