PTU B.Tech ECE 5th Semester May 2019 70546 DIGITAL SIGNAL PROCESSING Question Papers

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Roll No. EEEEEEEEEEN Total No. of Pages : 02
Total No. of Questions : 09

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INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt ANY FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt ANY TWO questions.

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SECTION-A

1. Write briefly :
   1. Whether the signal y(n) = sin 3# is periodic or non-periodic?
   2. Is the system y(n) = x(n) cos(wn) linear or non-linear?
   3. Give two advantages of digital signal processing over analog signal processing.
   4. Why the ROC of Z-transform cannot contain any pole ?

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   5. Why it is not possible to take the DFT of sequency having infinite length?
   6. In the implementation of a digital system what are the effects of finite-word-length?
   7. Give the various steps involved in the design of IIR filter.
   8. Differentiate between FIR and IIR filter.
   9. What is Gibbs Phenomenon?

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   10. List the various features of DSP processors.

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SECTION-B

1. Compute the convolution of x(n) = u (n) — u (n—15), h(n)=[1, 2, 2, 1]

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2. Determine the Z-transform and sketch the ROC of :
   x(n)=-aⁿ u(-n-1)
3. Obtain inverse Z-transform using partial fraction expansion method where :
   x(n) is causal
   1

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4. The transfer function of analog filter is :
   3
   16
   With T = 0.1sec. Design the digital filter using Bilnear Transformation Technique.
5. Obtain the direct form ldirect form 11, cascade & parallel structure for the following system :
   

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   y(m)==0.1y(n-1)+0.2y(n—1)+ 3x(n) +3.6x(n—1) + 0.6x(n — 2)

SECTION-C

1. Explain the different types of structures for the realization of FIR filter.
2. Compute the 8-point DFT of a sequence
   x(n)= 1,1,1,1,0,0,0,0,
   

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   Using in-place radix-2 decimation-in-time (DIT) FFT algorithm.
3. With the help of neat diagram describe the memory architecture of TMS320C54X and give the comparison between DSP processor and general purpose microprocessor.

NOTE : Disclosure of identity by writing mobile number or making passing request on any page of Answer sheet will lead to UMC case against the Student.

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