摘要
从理论上分析巴特沃斯低通滤波器以及基于圆周卷积的设计方法,以截止频率为1k Hz的巴特沃斯低通滤波器为例,给出了一种基于C语言的通用巴特沃斯低通滤波器设计方法。从时间开销和处理时延等方面,与基于Matlab的设计方法进行比较。仿真结果表明:处理时间是基于Matlab的设计方法的1/200。
In this article we analyzed theoretically the design methods of Butterworth low - pass filter based on circular convolution. Taken the Butterworth low - pass filter with the cutoff fre- quency 1 k Hz for an example, we present a design method of general Butterworth low - pass fil- ter based on C language. From the time overhead, processing delay and so on, we compare the method based on the C language with the method based on Matlab. Simulation results show that the processing time of the method given in this paper is 1/200 of that of the method based on Matlab.
出处
《大连民族学院学报》
CAS
2013年第1期72-75,共4页
Journal of Dalian Nationalities University
关键词
巴特沃斯滤波器
圆周卷积
C语言
Butterworth filter
circular convolution
C language
