Download PTU B.Tech 2021 Jan EE 7th Sem 71938 Digital Signal Processing Question Paper

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Roll No.

Total No. of Pages : 02

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Total No. of Questions : 18

B.Tech. (ΕΕ) (2011 Onwards Elective-II) (Sem.-7)
DIGITAL SIGNAL PROCESSING
Subject Code : BTEE-804C
M.Code : 71938

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INSTRUCTIONS 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.

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3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

Write briefly :

1. What is an Energy and Power signal?
2. Define recursive and non-recursive system.

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3. Determine the fundamental period of the signal.
4. Check for following system is stable or unstable.
5. State the convolution property of Fourier Transform.
6. What is ROC in Z-Transform?
7. State the time reversal property of Z-transform.

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8. Why the result of circular and linear convolution is not same?
9. What are the various methods to design IIR filters?
10. Write the steps involved in FIR filter design.

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SECTION-B

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11. Explain the classification of discrete systems.
12. Find the Z-transform and sketch the ROC :
    x (n) = a" cos & nu (n)
13. Obtain inverse Z-transform of :
14. Compute the Fourier Transform of x(n) = 2"u(n).

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15. Determine the length-4 sequence from its DFT :
    X(K) = [2, 1-j, 0,1+j]

SECTION-C

16. The system function of analog filter is as given
17. Design a FIR low pass filter using Kaiser Window having following specifications :

    Pass-band cut-off frequency = 1501
    

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    Stopband cut-off frequency = 250 Hz
    Passband ripple = 0.1 dB
    Stopband attenuation = 40 dB
    Sampling frequency = 1000 Hz

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18. a) State and prove convolution property of DFT.
    b) Determine the length-4 sequence from its DFT
    X(K) = [2, 1-j, 0, 1 + j]

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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