Wednesday, October 28, 2009
DIGITAL SIGNAL PROCESSING, |
PART – A (10 X 2 = 20 MARKS) |
1. State and prove the convolution property of Z transform. |
2. Check the system is linear or not y(n) = x(n)+ay(n-1) |
3. Write equations for finding DFT and IDFT using Z transform. |
4. Draw the radix 2 butterfly structure for DIF |
5. Draw the implementation for the generalized for IIR filter using direct form II. |
6. Explain how the addition and multiplication of (H1, H2) impulse responses |
implemented in filter design |
7. Write equations for Hanning and Blackman window. |
8. Why frequency prewarping procedure is adopted in the design of IIR filter? |
9. Write two advantages of musical sound processing and briefly explain. |
10. Explain the effects due to upsampling. |
PART - B (5 x 16 = 80 Marks) |
11.i) The impulse response of a linear TI system is h(n) = {1, 0, 1, -1}. Find the response |
of the system to the input signal x(n) = {1, 0, 2, 1}. |
ii) Check whether the system y(n) = x(n) – x(n-1) is LTI and stable. |
12.a) Develop and draw the 8 point radix-2 DIT FFT algorithm for DFT computation. |
(OR) |
12.b) Compute the DFT of the following sequence x(n) = 0 0£ n £ 2= 1 3£ n £ 6= 0 n=7 Plot |
magnitude and phase spectra |
13.a) Design a LPF with following specifications. Use Hamming window and at least 8 |
points. |
(OR) |
13.b)i) Obtain H(z) from H(s) when T = 1 sec. |
ii) Design a digital BPF using w1 & w2 as cutoff frequencies |
14.a)i) Perform the following using Floating Point arithmetic.1.5 x 1.75 and 1.5 x 1.75 |
ii) Realize the following H(z) given byusing cascade and Parallel form with Direct form-I. |
(OR) |
14.b)i) What is meant by quantization error? Explain briefly. |
ii) Realize the following filter using cascade technique with DF-I and DF-II. |
15.a) Briefly explaina. Interpolatorb. Decimatorc. Effects due to sampling rate conversion |
(OR) |
15.b)i) Write a note on Musical sound processing |
ii) Explain how the data compression is achieved in speech signal and discuss a technique |
to check the quality. |
http://www.ziddu.com/download/7201562/dsp2.pdf.html