Download GTU BE/B.Tech 2019 Summer 7th Sem New 2172409 Digital Signal Processing For Power Electronics Question Paper

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Subject Code: 2172409
GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
Subject Name: Digital Signal Processing for Power Electronics
Time: 02:30 PM TO 05:00 PM
Date: 27/05/2019
Total Marks: 70

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Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

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Q.1 (a) Define and classify signals. MARKS 03
(b) Explain the requirement of Fourier transformation. MARKS 04
(c) Describe round-off effect in digital filters. Explain the concept of limit cycle oscillations. MARKS 07

Q.2 (a) What is FFT? List the applications of FFT. MARKS 03

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(b) Explain Modified Harvard Architecture of DSP. MARKS 04
(c) Explain the concept of pipelining in DSP using an example. MARKS 07

OR

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Q.2 (a) What is MAC in DSP? Describe its features and advantages in DSP. MARKS 07
(b) What is ROC? List its properties. MARKS 03
(c) List the properties of DTFT. MARKS 04

Q.3 (a) Derive and explain the relationship between Z transform and DFT transform. MARKS 07

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OR

Q.3 (a) What do you understand by frequency domain sampling? MARKS 03
(b) Compare DTFT and DFT. MARKS 04

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(c) Derive and explain the relationship between Z transform and Fourier transform. MARKS 07

Q.4 (a) What is FFT? What are its types? MARKS 03
(b) Explain sampling process and reconstruction of signal. MARKS 04
(c) Explain Radix-2 FFT algorithm with a suitable example. MARKS 07

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OR

Q.4 (a) Explain quantization effects in computation of DFT. MARKS 03
(b) Differentiate FFT from DFT. Which one is more efficient and why? MARKS 04

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(c) Explain DIT FFT algorithm with a suitable example. MARKS 07

Q.5 (a) Explain the need of Z transform in Power Electronics applications with reference to DSP. MARKS 03
(b) Explain the interconnection of LTI systems in brief. MARKS 04
(c) Discuss cascade realization of FIR system in detail. MARKS 07

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OR

Q.5 (a) List the applications of DSP in Power Electronics. MARKS 03
(b) Sketch the signal represented by x1(t) = dcos(t) MARKS 04

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(c) Define: 1) ROC 2) Convolution 3) LTI system 4) Periodicity 5) Aliasing 6) State Space 7) Correlation MARKS 07

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