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

Roll No. Total No. of Pages : 02

Total No. of Questions : 18

B.Tech. (EE) (2011 Onwards Elective-II) (Sem.-7)

--- Content provided by‌ FirstRanker.com ---

DIGITAL SIGNAL PROCESSING

Subject Code : BTEE-804C

M.Code : 71938

Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

--- Content provided by‌ FirstRanker.com ---

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.

SECTION-A

Write briefly :

--- Content provided by‌ FirstRanker.com ---

1. What is an Energy and Power signal?
2. Define recursive and non-recursive system.
3. Determine the fundamental period of the signal.
   x(n) = cos(^30pn/₁₀₅)
4. Check for following system is stable or unstable.
   

   --- Content provided by‌ FirstRanker.com ---

   y(x) = x(¹/_2n)
5. State the convolution property of Fourier Transform.
6. What is ROC in Z-Transform?
7. State the time reversal property of Z-transform.
8. Why the result of circular and linear convolution is not same?

--- Content provided by‍ FirstRanker.com ---

9. What are the various methods to design IIR filters?
10. Write the steps involved in FIR filter design.

SECTION-B

11. Explain the classification of discrete systems.
12. Find the Z-transform and sketch the ROC :
    

    --- Content provided by​ FirstRanker.com ---

    x (n) = aⁿ cos n u (n)
13. Obtain inverse Z-transform of:
    X(Z) = ¹/_{1 - ¹/2Z^-1} , |z| > 1/2
14. Compute the Fourier Transform of x(n) = 2ⁿu(n).
15. Determine the length-4 sequence from its DFT :
    

    --- Content provided by​ FirstRanker.com ---

    X(K) = [2, 1-j, 0, 1+j]

SECTION-C

16. The system function of analog filter is as given
    H(S) = ^{s + 0.1}/_{(s + 0.1)² + 9}
17. Design a FIR low pass filter using Kaiser Window having following specifications :
    

    --- Content provided by FirstRanker.com ---

    Pass-band cut-off frequency = 150 Hz
    Stopband cut-off frequency = 250 Hz
    Passband ripple = 0.1 dB
    Stopband attenuation = 40 dB
    Sampling frequency = 1000 Hz

--- Content provided by FirstRanker.com ---

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.

FirstRanker.com

--- Content provided by⁠ FirstRanker.com ---