DTFT of sine wave using freqz

1. What is Freqz?
2. How do you find the DFT of a sine wave in Matlab?
3. What is the FFT of a sine wave?

What is Freqz?

freqz determines the transfer function from the (real or complex) numerator and denominator polynomials you specify and returns the complex frequency response, H(e^jω), of a digital filter. The frequency response is evaluated at sample points determined by the syntax that you use.

How do you find the DFT of a sine wave in Matlab?

f = -fs/2:fs/(N-1):fs/2; z = fftshift(fft(x)); subplot(2,1,2); plot(f,abs(z));

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.