railway RRB JE (CBT I + CBT II) Mock Test 2024 Signals and Systems Discrete Fourier Transform (DFT) and Discrete Fourier Series (DFS) Properties of Discrete Fourier Transform
For given x(n), X(ejω) is the discrete time fourier transform. If \(x\left( n \right) = {\left( {\frac{1}{2}} \right)^n}u\left( n \right)\) and y(n) = x2(n), then the value of Y(ej0) is:
1
\(\frac{1}{4}\)
2
20
3
4
4
\(\frac{4}{3}\)