CAJ | 학술논문

无限冲击响应(IIR)数字滤波器设计通常需要先设计S域滤波器，再变换到Z域。为简化 IIR数字滤波器的设计过程，本文提出利用单自由度系统(SDOF)模型直接设计 IIR数字滤波器的方法，包括低通、带通、高通、带阻等。仿真结果表明设计过程直接、简单，滤波器参数不需要随采样频率而变，具有良好特性，是一种设计 IIR数字滤波器的简便易用的新方法。
무한충격향응(IIR)수자려파기설계통상수요선설계S역려파기，재변환도Z역。위간화 IIR수자려파기적설계과정，본문제출이용단자유도계통(SDOF)모형직접설계 IIR수자려파기적방법，포괄저통、대통、고통、대조등。방진결과표명설계과정직접、간단，려파기삼수불수요수채양빈솔이변，구유량호특성，시일충설계 IIR수자려파기적간편역용적신방법。
Infinite Impulse Response(IIR) digital filter is designed usually inS-domain firstly, then theS-domain transfer function is transferred toZ-domain. To simplify the design process, a direct design method of filter based on Single Degree of Freedom(SDOF) model is presented, including the types of LP filter, HP filter, BP filter, BS filter. Simulation results show that the design process is direct and simple, and the designed filter bears good frequency characteristics. Another advantage of the proposed method is that the filter parameters needn’t change with system sample time. Therefore, it is a new method for IIR digital filter design with good usability.