한양대학교 통신시스템 2021 중간기말
분야
pdfDerive
the
Fourier transfonn
of
the
following
functions.
Write down the detailed steps
(No
point will
be given for the result only).
Assume
that
X;(j)
=
FT{x;(t)}
(5pts/each, total 20pts)
(a) xi(t) = sine(/) =
sin(1tt)/1tt
(b)
x2(t)
= 1 (c)
X3(t)
=
exp(;21t/ct)
(d)
X4(t)
= cos(2efit)
cos(21tfit)
wherefi
>fi
> 0 andfi
-fi
> 0.
2.
Let s(t) =
Acm1(t)cos(2efct+(>c)
+
Adm2(t)cos(2,ifdt+(>c)
where
W1
and
W2
are the
maximum
frequencies
of
m1(t)
and
m2(t),
and
O
여러 과목 판매하고 있으니 판매자료 참고 부탁드립니다.
