Use the Fourier transform of cos(k2ot) to find the Fourier transform of a periodic signal x(t) with a Fourier series x(1) = 1+(0.5) cos(k2ot). k=1

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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5.7 Use the properties of the Fourier transform in the following problems.
(a) Use the Fourier transform of cos(k2ot) to find the Fourier transform of a periodic signal
x (t) with a Fourier series
00
x(t) = 1+(0.5)* cos(k2ot).
k=1
(b) Find the Fourier transform of
1
x1(t)=
a > 0
12+ a²
by considering the properties of the transform. Hint: use the FT of e¬alrl for a > 0.
Answer: (b) X1(S2) = (1/a)e¬a\2].
Transcribed Image Text:5.7 Use the properties of the Fourier transform in the following problems. (a) Use the Fourier transform of cos(k2ot) to find the Fourier transform of a periodic signal x (t) with a Fourier series 00 x(t) = 1+(0.5)* cos(k2ot). k=1 (b) Find the Fourier transform of 1 x1(t)= a > 0 12+ a² by considering the properties of the transform. Hint: use the FT of e¬alrl for a > 0. Answer: (b) X1(S2) = (1/a)e¬a\2].
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