使用MATLAB進行快速傅立葉轉換 指導老師 張仁宗 學生 吳政達 2008/12/24 本教學利用一個簡單範例，說明如何使用MATLAB對一離散數列進行快速傅立葉轉換。 欲對一筆離散資料進行頻域分析時，快速傅立葉轉換(Fast Fourier Transform, FFT)是經常使用到的工具。
10-2 Discrete Fourier Transform (離散傅立葉轉換) 如果 x[n] 恰巧是這些基本弦波中的其中一個，那麼計算出來的雙邊頻譜，應該只有兩個係數不為零，我們可用 MATLAB 驗證如下： Example 2: fft01.m % This example demonstrates the two-side DFT of a sinusoidal function % (此範例展示一個簡單正弦波的傅立葉 ...
Fast Fourier transform - MATLAB fft - MathWorks This MATLAB function returns the discrete Fourier transform (DFT) of vector x, ... f = Fs/2*linspace(0,1,NFFT/2+1); % Plot single-sided amplitude spectrum. plot(f ...
Fourier transform - MATLAB fourier - MathWorks This MATLAB function computes the Fourier transform of f with respect to the transformation variable trans_var at the point eval_point.
Fast Fourier transform - MATLAB fft - MathWorks - MATLAB and Simulink for Technical Computing - A This MATLAB function returns the discrete Fourier transform (DFT) of vector x, computed with a fast Fourier transform (FFT) algorithm. ... The FFT functions (fft, fft2, fftn, ifft, ifft2, ifftn) are based on a library called FFTW [3],[4]. To compute an N-
Fast Fourier Transform (FFT) - MATLAB & Simulink - MathWorks The MATLAB® functions fft, fft2, and fftn (and their inverses ifft, ifft2, and ifftn, respectively) all use fast ...
Fast Fourier transform - MATLAB fft - MathWorks United Kingdom This MATLAB function returns the discrete Fourier transform (DFT) of vector x, computed with a fast ...
Computing Fourier Series and Power Spectrum with MATLAB Computing Fourier Series and Power Spectrum with MATLAB By Brian D. Storey 1. Introduction Fourierseriesprovidesanalternatewayofrepresentingdata:insteadofrepresent-ingthesignalamplitudeasafunctionoftime,werepresentthesignalbyhowmuch information is ...
Fourier Analysis and Filtering - MATLAB & Simulink - MathWorks fft, Fast Fourier transform. fft2, 2-D fast Fourier transform. fftn, N-D fast Fourier ... ifft2, 2-D inverse fast Fourier transform. ifftn, N-D inverse fast Fourier transform.
Fourier Series - MATLAB & Simulink - MathWorks The Fourier series is a sum of sine and cosine functions that describes a periodic signal. ... (Optional) Click Fit Options to specify coefficient starting values and ...
