Question

z

幫解(a)(b)(c)(d)

1. A periodic signal x[n] is shown below.
x(n]
th
0
2
11
4
5
8
It's Fourier series representation is as follows:
x[n]
avejkuyn
k=<N>
(a) Determine the fundamental period N of the periodic signal x[n].
(b) Determine the fundamental frequency wo.
(c) Plot the real part of ejern (denoted by Re{ejun}). (hint: eje
= cose + jsin)
, Refeiwn}
→n
(d) Plot Re{ej2wyn}
• Referawang
→n
3
5
2