摘要
求信号的傅里叶变换有很多种方法,除了根据傅里叶变换的定义计算积分,也可以在已知傅里叶变换对的基础上利用性质来求,还可以利用拉普拉斯变换求傅里叶变换.本文主要研究利用信号的拉普拉斯变换求傅里叶变换的方法,分析其适用条件,并举例说明方法的运用.
There are multiple methods to obtain the Fourier transforms of signals.Besides calculating the Fourier integral or taking use of properties of Fourier transform on the base of given transform pair,utilizing Laplace transform to get Fourier transform is also an effective way.This paper studies and illustrates the method with which to obtain the Fourier transform of a signal from its Laplace transform,and expounds the applicable condition of this method with examples.
作者
宋琪
陆三兰
SONG Qi;LU Sanlan(School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《湖南理工学院学报（自然科学版）》
CAS
2021年第4期88-90,共3页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
基金
华中科技大学校级教学研究专项项目“信息技术与信号处理类课程教学的深度融合的研究与实践”(2018016)。
关键词
傅里叶变换
拉普拉斯变换
信号与系统
绝对可积
Fourier transform
Laplace transform
signals and systems
absolutely integrable
