# Fourier Transform of a signal

3 visualizaciones (últimos 30 días)
mar gal el 29 de Dic. de 2020
Respondida: Steve Eddins el 29 de Dic. de 2020
I've been trying to attempt this, but I'm not entirely sure how to start, I tried looking up the fft function but I don't know how it works
##### 0 comentariosMostrar -2 comentarios más antiguosOcultar -2 comentarios más antiguos

Iniciar sesión para comentar.

### Respuestas (1)

Steve Eddins el 29 de Dic. de 2020
The fft function in MATLAB computes something called the discrete Fourier transform. Your problem here is asking you to find something that I would call the continuous-time Fourier transform. The two things are related but are not the same, and I do not think that any output from fft would be considered a satisfactory solution to the problem.
The functions and are functions that have continuous-time Fourier transforms with relatively simple, mathematical forms. You can look up the Fourier transforms of the sinc and cos functions in a textbook. Then, apply Fourier transform properties (time scaling, multiplication of two signals) to figure out the equations for the Fourier transforms of and . These Fourier transforms can then be plotted accurately by hand.
##### 0 comentariosMostrar -2 comentarios más antiguosOcultar -2 comentarios más antiguos

Iniciar sesión para comentar.

### Categorías

Más información sobre Discrete Fourier and Cosine Transforms en Help Center y File Exchange.

### Community Treasure Hunt

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

Start Hunting!

Translated by