how can I do the fourier transform of triangular pulse using 'fft' function?

19 次查看（过去 30 天）
Tahiatul Islam
Tahiatul Islam 2013-8-11
评论： Image Analyst 2020-5-4
body of the function is- f(t)=[1-|t|/T], when|t|<T, else 0.
  1 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2013-8-11
编辑：Azzi Abdelmalek 2013-8-11
What is your problem? how to use fft function or how to generate a triangular pulse?. You have also, to specify the time interval

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2013-8-12
Sounds like homework, though you didn't say. Hint: Try using linspace() to create rising and falling ramps, then stitch together.
risingRamp = linspace(0, 1, int(T/2));
triangularPulse = [zeros(1, N), risingRamp, fallingRamp, zeros(1, N)];
see what you can do with that. Then call fft(). Try it yourself.
  9 个评论
显示 7更早的评论
Image Analyst
Image Analyst 2018-10-7
No. Since the fft of a rect function is a sinc, and two rects convolved with each other give a triangle, then the fft of a triangle will give the multiplication of the ffts of a single rect, in other words, it will be a sinc squared.
ft(rect) => sinc
rect ** rect => triangle
ft(triangle) = ft(rect ** rect) = ft(rect) * ft(rect) = sinc^2

请先登录，再进行评论。

更多回答（1 个）

Priya Kasture
Priya Kasture 2020-5-4
Find FOURIER TRANSFORM of triangular pulse x(t)= triang(t/2pi) using heaviside function. Pls solve stepwise and show.

类别

在 Help Center 和 File Exchange 中查找有关 Simulink 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by