Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 1 (Q.No. 17)
17.
Which of the following cannot be the Fourier series expansion of a periodic signal?
Answer: Option
Explanation:
x(t) = cos t + 0.5
not satisfies the Dirichlet condition.
The integration of constant term is ∞.
Discussion:
11 comments Page 1 of 2.
Rohit prakash said:
1 decade ago
We can say that it's a Fourier series so it should contain sin or cosine terms.
Dhiman biswas said:
10 years ago
It signifies that we know Fourier series expansion is possible only in periodic signal in correct option there is a dc term.
Eswar said:
9 years ago
In option B irrational numbers will get.
Anirban Sengupta said:
9 years ago
The answer is incorrect. Option B will be the right answer. Because the ratio of two frequencies is not rational. So that's why it is not a periodic function and hence can't be expressed as Fourier series.
Amit said:
9 years ago
The Answer should be B.
Abhishek said:
8 years ago
The answer should be B because it is not at all periodic signal.
Venkatesh said:
8 years ago
Yes. Option B will be right. Because it's not a periodic signal and we cannot find Fourier series for a periodic signal.
Sunil said:
8 years ago
Option B is right.
Venkatesh said:
7 years ago
Option B is correct. Because it was a non periodic signal.
Chand said:
6 years ago
Option B is the correct answer.
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