EC202 SIGNALS & SYSTEMS Module5 QUESTION BANK

1. NEHRU COLLEGE OF ENGINEERING AND RESEARCH CENTRE
QUESTION BANK
EC 202: SIGNALS & SYSTEMS
MODULE V
1. Evaluate the inverse Z-transform of
2. Evaluate the DTFT of following signal
3. Find the DTFT of x(n) = 0.25n u(n+2)
4. Give the Parseval’s theorem for DTFT. Prove it.
5. Compute the energy of the sequence
6. An LTI system is characterized by the system function given as
Under what conditions the system will be obey causality and stability?
Determine the impulse response of the system such that
i) The system is causal ii) The system is stable
Justify the answers.
7. Find the z-transform and specify ROC
8. Write the Fourier series representation of a discrete time periodic signal with
periodicity N. What is the difference between continuous time and discrete time
Fourier series?