Power Spectral Density of a sequence x(n)using N-point DFT

The power spectral density (PSD) of the signal describes the power present in the signal as a function of frequency, per unit frequency.

Enter the sequence x(n):
[1 2 2 1]
Enter the value of N
4

PSD =

9.0000 0.5000 0.0000 0.5000

Enter the sequence x(n):
[1 2 2 1]
Enter the value of N
8

PSD =

4.5000 2.4874 0.2500 0.0126 0.0000 0.0126 0.2500 2.4874