Download JNTUK M-Tech 2020 R19 ECE Advanced Digital Signal Processing Model Question Paper

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[M19CS1102]

I M. Tech I Semester (R19) Regular Examinations

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ADVANCED DIGITAL SIGNAL PROCESSING

DEPARTMENT OF ELECTRONICS & COMMUNICATIONS ENGINEERING

MODEL QUESTION PAPER

TIME: 3Hrs. Max. Marks: 75 M

Answer ONE Question from EACH UNIT.

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All questions carry equal marks.

UNIT-I

1. a). Using Decimation in Time algorithm find the FFT of x[n]={1,2,3,1,-1,3,-4}.
   b). Perform the two-band poly-phase decomposition of the transfer function
   H(z) = (2+z^-1) / (1+3z^-1+5z^-2)

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OR

2. a). Describe the frequency domain description of an Interpolator.
   b). Calculate the DFT of x[n]={1,0,1,2,1,3,1,4}.

UNIT-II

3. a). Describe the oversampling A/D and D/A converters.
   

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   b). Explain the implementation of sampling rate converters using Polyphase filters.

OR

4. a). Explain how sampling rate conversion of band pass signals can be achieved.
   b). Draw and explain the block diagram of two channel QMF bank.

UNIT-III

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5. a). Explain the Blackmann and Tukey method of smoothing the periodogram.
   b). Derive the expressions for quality-factor for various non-parametric methods.

OR

6. a). Discuss in brief about Bartlett method of power spectrum estimation.
   b). Explain the Welch’s method for the power spectrum estimation.

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UNIT-IV

7. a). Explain the operation of Backward Linear predictor with a neat derivation.
   b). What are the advantages of lattice structures?

OR

8. a). Explain lattice structures for IIR filters.
   

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   b). Explain the quantization and round off errors in a digital filter.

UNIT-V

9. a). Explain Burg method of power spectrum estimation.
   b). Explain the autocorrelation function with its properties.

OR

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10. a). Explain the MA & ARMA models for power spectrum estimation.
    b). Describe the Yule-Walker method of power spectrum estimation.

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