摘要
本文提出并说明了用模块法设计有限长冲激响应滤波器的原理和方法，文中给出了算例，与其它方法比较具有设计简单、工程实用方便等优点。
Anew method is described for designing FIR digital filter. A desired frequen-cy response can be requarded as the sum of elementary frequency units (EFV) trapezoidshaped with different central frequency.The article compared the new method with thewindow method,and supplied some examples.The article also discussed the relation be-tween quality target and unit paramcter.
