Vinayaka Missions University 2009 B.E Information Technology FUNDAMENTALS OF DIGITAL SIGNAL PROCESSING BANK - Question Paper

UNIT II
PART A

1. List down any 4 properties of DTFT.
2. Define DFT.
3. State shifting property of DFT.
4. What is zero padding?
5. Find Fourier transform of a sequence
6. What is DIT radix-2 FFT?
7. Find the calculation efficiency of 1024 point FFT over 1024 point DFT.
8. Why FFT is needed?
9. What is the sufficient condition for the existence of DTFT?
10. Distinguish ranging from DTFT and DFT.
11. How many multiplications and additions are needed to calculate N-point DFT using radix-2 FFT.
12. What are the applications of FFT algorithms?
13. Give relationship ranging from DTFT, DFT and Z- transform.
14. Write the application of Fourier transforms.
15. Determine the DTFT of the sequence x(n) = {1,-1,1,-1).
16. Draw the radix-2 butterfly diagram for DIT and DIF algorithms.
17. Arrange the eight point sequence x(n)={1,2,3,4,-1,-2,-3,-4} in bit reversed order.
18. What are the differences ranging from DIT and DIF algorithms?

PART B

1. Find the DFT of the sequence of = {1, 1, 0, 0} (12marks)

2. obtain the eight point DFT of the sequence (12marks)

3. obtain the DFT of the sequence
for N = three and N = 5. (12marks)

4. An 8-point sequence is provided by calculate 8-point
DFT of by radix-2 DIF-FFT. (12marks)

5. In eight point sequence is provided by x(n)=(2,1,1,2,1,1,1,1) calculate eight point DFT of x(n) by radix-2
DIT-FFT (12marks)

6. i) ) obtain four point DFT of the subsequent signal x(n)=sin(n?/2) (8marks)
ii) Compare the DIT and DIF radix-2 FFT. (4marks)


UNIT III
PART A

1. Draw the general realization structure in direct form-I of IIR system.
2. State the condition for the stability of digital filter.
3. Define IIR.
4. Mention any 2 procedures for digitizing transfer function of an analog filter.
5. Compare the digital and analog filter.
6. Mention the important features of IIR filters.
7. How bilinear transformation is performed?
8. What are the advantages of bilinear transformation?
9. List out the basic properties of IIR filters.
10. Classify the filters based on frequency response.
11. How will you determine the order N of chebyshev filter?
12. What are the steps involved in the design of digital IIR filter.
13. Give the transformation used in the approximation of derivates.

Earning:   Approval pending.