Question 1
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What is the expression for Fourier series coefficient ck in terms of the discrete signal x(n)?
Explanation: We know that, the Fourier series representation of a discrete signal x(n) is given as
Question 5
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What is the average power of the discrete time periodic signal x(n) with period N?
Explanation: Let us consider a discrete time periodic signal x(n) with period N.
Question 6
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What is the Fourier transform X(ω) of a finite energy discrete time signal x(n)?
Explanation: If we consider a signal x(n) which is discrete in nature and has finite energy, then the Fourier transform of that signal is given as
Question 7
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Pass Ratio : 100%
What is the energy density spectrum Sxx(ω) of the signal x(n)=anu(n), |a|<1?
Explanation: Since |a|<1, the sequence x(n) is absolutely summable, as can be verified by applying the geometric summation formula.