..:: Frequency Analysis of Signals and Systems on Digital Signal Processing related Questions and Answers

Frequency Analysis of Signals and Systems on Digital Signal Processing related Questions and Answers

Question : What is the energy density spectrum Sxx(ω) of the signal x(n)=aⁿu(n), |a|<1?
1. 1/(1+2acosω+a² )
2. 1/(1+2asinω+a² )
3. 1/(1-2asinω+a² )
4. 1/(1-2acosω+a² )
Answer : 4 - 1/(1-2acosω+a² )

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