Digital Signal Processing
Signal Processing & Communication Lab
Digital Signal Processing
Unit-1
1. What is
difference between digital signal & discrete signal
2. What is
difference between digital signal processing & analog signal processing
3. What are
the applications of digital signal processing
4. What are
the different types of signals & system. Give examples
5. List
standard test signals
6. What is
aliasing effect
7. What are
the properties of LTI system
8. Define
impulse response
9. What is
auto correlation & cross correlation & state its applications
10. What are
the advantages of Z transform
11. Compare
Z transform & Fourier Transform
12. How to
check stability & causality of the system in Z domain
13. What are
the properties of ROC
14. What are
the properties Z transform
15. Explain
the significance of pole location in determining the behavior of the system
16. What is
system function
17. What are
different methods to find out inverse z transform
18. Compare
analog filter with digital filter
19. Compare
butterworth & chebyshev
approximation
20. What is
roc of following sequences
- Finite causal
- Finite anti-causal
- Infinite causal
- Infinite anti-causal
Unit-2
- Define DFT & state its properties
- What is difference between DTFT & DFT
- What is difference between linear & circular convolution
- What is difference twiddle factor and what is its significance
- Write the formula of DFT & IDFT
- Form the twiddle factor for matrix of size N
- What is leakage effect of in FFT
- Compare the computational complexity of DFT & FFT
- Define DIT &DIF algorithms
- What is difference between overlap add & overlap save method
- What is necessity of overlap add & overlap save method
- Draw signal flow graph of 4 point, 8 point & 16 point DIT FFT
- What is Radix
- What is application of FFT
15. How many
no. Of stages of decimation are required in the case of 8 point & 16 point,
32 point & 64 point Radix DIT FFT
- Explain inpalce computation
Unit-3
1. What are
the characteristic of FIR filter
2. State
different types of window & their characteristic
3. Compare
all the windows
4. What are
symmetric & anti symmetric filters
5. What is
Gibb’s phenomenon
6. Why rectangular
window is not preferred
7. Draw the
spectrum of all the windows
8. Explain
different forms of realization
9. List the
DSP processor & its manufacturers
10. Why
windowing is necessary
Unit-4
1.
What is difference between FIR & IIR filters
2.
What are the methods for designing IIR filter
3.
How to map the poles from S plane to Z plane
4.
What is the approximation impulse invariance
& bilinear transformation
5.
What is warping effect
6.
What is frequency transformation
7.
State the applications of iir & fir filters
8.
Whether iir filter is physically realizable or
not
9.
What are the different parameters of speech
signal
10. Explain
echo cancellation
Unit-5
- What is multirate digital signal processing?
- Define Decimation with an example?
- Explain interpolation with an example?
- Draw the block diagram of multirate decimator and interpolator?
- What is sub-baud coding?
- List the different types of A/D converter and D/A converter?
- What is oversampling and undersampling ADC?
- What is STFT? Discuss its advantages and disadvantages?
- Compare between Fourier Transform and Wavelet Transform?
- What are the applications of Wavelet Transform?
Unit
-6
- What is word length?
- What are finite word length effects?
- What is fixed point representation?
- What is floating point representation?
- What is truncation?
- What is rounding?
- Compare between fixed and floating point arithmetic?
- Difference between microprocessor and DSP?
- What are the desirable features of DSP?
- What are limit cycle oscillations
- Mention any one application in which DSP is used in day to day life?
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