iUNIVERSITY COLLEGE OF ENGINEERING TINDIVANAM

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERINGSUB: EC2302-Digital Signal Processing SEM:V ECE DATE:31.10.12 (AN) DURATION:1Hr&30mins ASSESSMENT -III

Part-A (2X5=10) Answer all questions

1. Why bilinear transformation is better than Impulse Invariance method?2. What is warping effect? State, how can you overcome it?

3. What do you meant by Finite Word Length effects?

4. Truncate the sequences to 4 bits 5. Signal power is 36 and no bits used for quantization is 5 bits. Estimate S/N ratio in dB.

Part- B Answer any Four questions

6. Two systems are cascaded with transfer functions and input is quantized to 3 bits. Calculate its output noise power in dB. (15) 7. Design a Digital Butterworth filter satisfying conditions 0.707H(ejw)1 for 0w/2 and H(ejw)0.2 for 3/4w with T=1sec using Bilinear transformation and Impulse invariance method.(15)8. Explain in detail with examples about limit cycle oscillations and co-efficient quantization error. (10)

UNIVERSITY COLLEGE OF ENGINEERING TINDIVANAM

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERINGSUB: EC2302-Digital Signal Processing SEM:V ECE DATE:31.10.12 (AN) DURATION:1Hr&30mins

ASSESSMENT -III

Part-A (2X5=10) Answer all questions 1. Why bilinear transformation is better than Impulse Invariance method?

2. What is warping effect? State, how can you overcome it?

3. What do you meant by Finite Word Length effects?

4. Truncate the sequences to 4 bits 5. Signal power is 36 and no bits used for quantization is 5 bits. Estimate S/N ratio in dB.

Part- B Answer all questions

6. Two systems are cascaded with transfer functions and input is quantized to 3 bits. Calculate its output noise power in dB. (15) 7. Design a Digital Butterworth filter satisfying conditions 0.707H(ejw)1 for 0w/2 and H(ejw)0.2 for 3/4w with T=1sec using Bilinear transformation and Impulse invariance method.(15)

8. Explain in detail with examples about limit cycle oscillations and co-efficient quantization error. (10)