摘要
针对滤波器阶数太高,滤波器系统不稳定,造成滤波器的输出数据出现inf或NAN的缺点,文中结合实例用"降采样"和"fdesign+design"的Matlab编程方法设计了巴特沃斯数字滤波器,并给出了这两种方法的Matlab程序,仿真表明所设计的巴特沃斯数字滤波器可以有效地解决上面的问题,而且"fdesign+design"方法不用通过降采样同样可以得到相似的幅值响应曲线,可以一次设计多个IIR滤波器,比经典方法要简单。
Because the filter order is too high and the filter system is unstable,the output data of the filter will be inf or NAN.In this paper,the butterworth digital filter is designed with the Matlab programming method of＂descending sampling＂and＂fdesign＋design＂,and the Matlab program of these methods is given. The simulation shows that the design of butterworth digital filter can effectively solve the above problems,and the＂fdesign＋design＂method can also get similar amplitude response curves without descending sampling,can design multiple IIR filters at a time,which is simpler than the classical method.
作者
吴冉
阮晨
WU Ran;RUAN Chen(College of Computer and Information Engineering,Nanyang Institute of Technology,Nanyang 473004;Huazhong University of Science and Technology,Wuhan 430074)
出处
《舰船电子工程》
2018年第8期190-193,共4页
Ship Electronic Engineering
基金
国家自然科学基金(编号:31671360)资助
