DTFT of any finite sequence in matlab

1. How do you find the DTFT of a sequence?
2. How do you find the FFT of a sequence in MATLAB?
3. How do you find the 8 point DFT of a sequence?

How do you find the DTFT of a sequence?

Find the DTFT of the sequence x(n)=u(n−k). ⇒F[u(n−k)]=e−jωk+e−jω(k+1)+e−jω(k+2)+... ⇒F[u(n−k)]=e−jωk(1+e−jω+e−j2ω+e−j3ω+...)

How do you find the FFT of a sequence in MATLAB?

Description. Y = fft( X ) computes the discrete Fourier transform (DFT) of X using a fast Fourier transform (FFT) algorithm. If X is a vector, then fft(X) returns the Fourier transform of the vector. If X is a matrix, then fft(X) treats the columns of X as vectors and returns the Fourier transform of each column.

How do you find the 8 point DFT of a sequence?

x[7]] the 8-point discrete Fourier transform (DFT) is denoted by X̅ = DFT (x̅) = X[0], X[1], ...., X[7]], where X [ k ] = ∑ n = 0 7 x [ n ] e x p ( − j 2 π 8 n k ) Here j = √-1, if x̅ = [1, 0, 0, 0, 2, 0, 0, 0] and y̅ = (DFT (x̅)), then the value of y[0] is ________ (rounded off to one decimal place).