FourierSeries`
FourierSeries`
DTFourierTransform
As of Version 7.0, DTFourierTransform has been renamed to FourierSequenceTransform and is part of the built-in Wolfram Language kernel.
DTFourierTransform[expr,n,ω]
gives the discrete time Fourier transform of expr as a function of ω, where expr is a function of n.
更多信息和选项
- To use DTFourierTransform, you first need to load the Fourier Series Package using Needs["FourierSeries`"].
- The discrete time Fourier transform of expr is by default defined to be
expr 2πω. - DTFourierTransform returns a periodic function of ω with default period 1.
- Different choices for the definition of the discrete time Fourier transform can be specified using the option FourierParameters.
- With the setting FourierParameters->{a,b}, the discrete time Fourier transform computed by DTFourierTransform is
expr 2 πω, a periodic function of ω with a default period of 
.
范例
Wolfram Research (2008)，DTFourierTransform，Wolfram 语言函数，https://reference.wolfram.com/language/FourierSeries/ref/DTFourierTransform.html.
文本
Wolfram Research (2008)，DTFourierTransform，Wolfram 语言函数，https://reference.wolfram.com/language/FourierSeries/ref/DTFourierTransform.html.
CMS
Wolfram 语言. 2008. "DTFourierTransform." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/FourierSeries/ref/DTFourierTransform.html.
APA
Wolfram 语言. (2008). DTFourierTransform. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/FourierSeries/ref/DTFourierTransform.html 年