GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Code: 2172409
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
Subject Name: Digital Signal Processing for Power Electronics
Time: 10:30 AM TO 12:30 PM
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Give three examples of continuous time signals. | 03 |
| (b) Explain the use of Fourier transformation in Power Electronics applications. | 04 | |
| (c) Explain DT, DTFT, DFT and Z transform in brief. | 07 | |
| Q.2 | (a) Explain Von-Neumann DSP architecture. | 03 |
| (b) Explain Harvard Architecture of DSP. | 04 | |
| (c) Explain the concept of pipelining in DSP using suitable example. | 07 | |
| Q.3 | (a) Find the N point DFT of finite duration sequence of length L given as x(n)=1 for 0| 03 | |
| (b) What is reconstruction of signal? Explain the requirement of signal reconstruction. | 04 | |
| (c) Derive the relationship between Z and DFT transform. | 07 | |
| Q.4 | (a) What do you understand by frequency domain sampling? | 03 |
| (b) Explain round-off effect in digital filters | 04 | |
| (c) Derive the relationship between Z and-Fourier transform. | 07 | |
| Q.5 | (a) How is scaling useful in DSP? | 03 |
| (b) Explain ROC and list its properties. | 04 | |
| (c) Explain DIT FFT algorithm. | 07 | |
| Q.6 | (a) What is quantization effect in computation of DFT? | 03 |
| (b) Explain in brief any two applications of DSP in Power Electronics. | 04 | |
| (c) Explain Radix-2 FFT algorithm. | 07 | |
| Q.7 | (a) Draw an example parallel form structure. | 03 |
| (b) Find the mantissa and exponent required respectively to represent ‘5’ in binary floating-point representation. | 04 | |
| (c) Discuss cascade realization of FIR system in detail. | 07 | |
| Q.8 | (a) Explain the interconnection of LTI systems in brief. | 03 |
| (b) Sketch the signal represented by x1(t) = dcos(t) | 04 | |
| (c) Define: 1) ROC 2) Convolution 3) LTI system 4) Periodicity 5) Aliasing 6) State Space 7) Correlation | 07 |
Date: 30/01/2021
Total Marks: 56
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