摘要
介绍了如何由物理不可实现的理想低通滤波器到实际可实现的数值模拟滤波器的具体过程,具体采用了巴特沃斯响应逼近理想特性,并说明了滤波器的阶次是影响低通滤波器精度的主要因素,最后结合实例,借助MATLAB进行了模拟低通滤波器的设计仿真。
This paper mainly describes the process of how can we carry out the numerical modeling filter from the ideal low-pass filter which can＇t carry out by the physics. Here, Butterworth-respond method is adopted to approach ideal characteristic, and the rank order of the filter showed to be the main factor that influences a low-pass filter accuracy. In the end, we link an example with MATLAB to realize the program design of analogue low-pass filter
出处
《湖南科技学院学报》
2009年第4期48-49,共2页
Journal of Hunan University of Science and Engineering
基金
陕西省教育厅专项科研基金资助项目(08JK286)
渭南师范学院研究生基金项目(07YKZ001)
