FIR 数字滤波器与频率采样

Finite Impulse Response Digital Filters and Samplings in Frequency Domain

本文在频率采样理论的基础上提出了用矩降设计 FIR 数学滤波器的原理和方法。讨论了数字滤波器过渡带确定的规律和有关参数与滤波器质量指标之间的关系,推导出了闭合表达式,实现计算机分析的工程过程。

This paper,based on then theory of the samplings in frequency domain,discussed not only the principles and the methods of designing FIR digital filters by matrix but also the decided patterns of the transitional bands in digital filters and the relations between the related parameters and the indexes of the filters qualities.It also derived the formulas under closed con- ditions.Thus,the process in which the engineering was analysed by a computer was realized.