Howtosignalprocessing
- What is the FFT of a sine wave?
- How do you find the sample of a sine wave?
- What is the result of FFT?
- How do you find the Fourier transform of a sine function in Matlab?
What is the FFT of a sine wave?
The FFT. The function fft( ) estimates the coefficients of the Fourier transform, transforming a time-domain signal (i.e., an observed fMRI time series) into a series of sine waves with different amplitudes and phases. Fourier coefficients are complex numbers, with values in the real and imaginary planes.
How do you find the sample of a sine wave?
Digitizing the sine wave
We can thus use the formula sn = A � sin(2πfn/sr) where n is a positive integer to generate samples for a frequency of f cycles per second. To make the arithmetic easier, imagine sr = 10,000 and f = 100. n should then range over 0 to 100 for one complete cycle to be output.
What is the result of FFT?
The FFT function returns a result equal to the complex, discrete Fourier transform of Array. The result of this function is a single- or double-precision complex array.
How do you find the Fourier transform of a sine function in Matlab?
f = -fs/2:fs/(N-1):fs/2; z = fftshift(fft(x)); subplot(2,1,2); plot(f,abs(z));
