1. DIGITAL SIGNAL PROCESSING
(DSP-8CC09)
VSQ’s on Units- 4,5,6
VSQ’s on Units- 4,5,6
Faculty: V.RAJENDRA CHARY(VRC),
Assistant Professor,ECE,SNIST
Class: III B.Tech,I Semester, ECE
2. SYLLABUS
UNIT-
1. INTRODUCTION
2. DISCRETE FOURIER TRANSFORM
3. FAST FOURIER TRANSFORMS
3. FAST FOURIER TRANSFORMS
…..mid 1
4. DIGITAL IIR FILTERS
5. DIGITAL FIR FILTERS
6. MULTIRATE DIGITAL SIGNAL PROCESSING
…..mid 2
RAJENDRA CHARY 2
3. UNIT-IV DIGITAL IIR FILTERS
• ANALOG FILTER APPROXIMATIONS – Butterworth and
Chebyshev Approximations.
• IIR DIGITAL FILTERS: Design of IIR Digital filters from analog
filters-Impulse Invariance, Step invariance and Bilinear
filters-Impulse Invariance, Step invariance and Bilinear
Transformation methods, Design Examples, Analog-Digital
transformations.Basic structures of IIR systems, Transposed forms,
• Applications: Design of IIR digital filter conforming to given
specifications.
RAJENDRA CHARY 3
4. UNIT-V DIGITAL FIR FILTERS
• FIR DIGITAL FILTERS:Characteristics of FIR Digital Filters,
frequency response, Design of FIR Digital Filters using Fourier
series method, Windowing Techniques-Rectangular, Triangular,
Hamming, Hanning and Bartlett’s Windows, Steps in Kaiser
Hamming, Hanning and Bartlett’s Windows, Steps in Kaiser
windowing method, Frequency Sampling technique, Comparison
of IIR and FIR filters.Basic structures of FIR systems
• Applications: Design of FIR digital filter conforming to given
specifications.
RAJENDRA CHARY 4
5. UNIT-VI MULTIRATE DIGITAL SIGNAL
PROCESSING
• Decimation, interpolation, sampling rate conversion. Introduction
to DSP Processors.
• Applications of Multirate Digital Signal processing: Design of
digital filter banks and quadrature mirror filters etc.
digital filter banks and quadrature mirror filters etc.
RAJENDRA CHARY 5
8. 1)Distinguish between Butterworth and Chebyshev filters. (A17 Reg
Dec 2019) (A14 Supply Nov 2017)
2)What is the disadvantage of impulse invariant method? (A17 Reg
Dec 2019)
3)Explain Round off noise in IIR Digital filters.
3)Explain Round off noise in IIR Digital filters.
4)Give any two properties of Butterworth low pass filter.
5)Distinguish between analog and digital filters.
6)What are the realization structures used for the implementation of
IIR filter?
RAJENDRA CHARY 8
9. 7)Compare Direct form-I and Direct form-II realizations.
8)Define IIR filter. (R3,7.1)
9)Classify filters based on frequency response.(R3 7.4)
10)What are the requirements for an analog filter to be stable and
causal. (R ,7.6)
causal. (R3,7.6)
11)What are the requirements for an digital filter to be stable and
causal. (R3,7.7)
12)Define ripples in a filter. (R3,7.9)
RAJENDRA CHARY 9
10. 13)Mention any two techniques for digitizing the transfer function of
an analog filter. (R3,7.11)
14)What is the relation between digital and analog frequencies in
impulse invariance transformation. (R3,7.22)
15)What is aliasing. (R3,7.23)
16) What is the relation between digital and analog frequencies in
16) What is the relation between digital and analog frequencies in
bilinear transformation. (R3,7.29)
17)What is prewarping?why is it employed. (R3,7.34)
18)Compare impulse invariance and bilinear
transformation.(R3,7.36)
RAJENDRA CHARY 10
11. 19)What is frequency warping. (R2,unit8,Q19)
20)What are the advantages and disadvantages of bilinear
transformation. (R2,unit8,Q20)
21)How the order of the filter affects the frequency response of
Butterworth filter. (R2,unit8,Q31)
22)Give any two properties of Butterworth low pass filter. (R
22)Give any two properties of Butterworth low pass filter. (R1
unit5,Q2)
23)What are the properties of Chebyshevfilter.(R1 unit5,Q3)
24)What are the different types of structures for realization of IIR
filter. (R1 unit5,Q39)
RAJENDRA CHARY 11
12. 25)How many no.of additions,multiplications and memory locations
are required to realize a system H(z) having M zeros and N poles
in direct form-I and direct form-II realization? (R1 unit5,Q40)
26)Give direct form-I and direct form-II structure of second order
system realization. (R1 unit5,Q43)
system realization. (R1 unit5,Q43)
27)What is the main advantage of dircet form-II over direct form-I.
(R1 unit5,Q44)
28)What are the factors that influence the choice of structure for
realization of an LTI system. (R2, unit4,Q8)
RAJENDRA CHARY 12
13. 29)Why direct form-I is called non-canonical structure.
(R2,unit4,Q11)
30)Why direct form-II is called canonical structure. (R2,unit4,Q12)
RAJENDRA CHARY 13
15. 1)What is frequency warping? Explain. (A17 Reg Dec 2019)
2)What is Pre warping? Why it is employed in filter design?(A14
Supply Nov 2017)
3)Are FIR filters always stable or not and why? (A14 Supply Nov
2017)
2017)
4)Compare IIR and FIR Filters.
5)Compare Hamming Window with Kaiser Window.
6)What are the advantages of FIR Filters?
7)What is Gibb’s Phenomenon?
RAJENDRA CHARY 15
16. 8)What is the principle of designing FIR filter using frequency
sampling method?
9)What are the advantages of Digital filter over analog filter?
10) What are the characteristics of FIR filter?
11)What is the necessary and sufficient condition for the linear phase
11)What is the necessary and sufficient condition for the linear phase
characteristics of an FIR filter. (R3,6.7)
12)Write the two concepts that lead to the Fourier series method of
designing FIR filters. (R3,6.19)
RAJENDRA CHARY 16
17. 13)What are the desirable characteristics of the frequency response
of window function. (R3,6.24)
14)Why is triangular window not a good choice for designing FIR
filter . (R3,6.34)
15)What are the disadvantages of Fourier series method
15)What are the disadvantages of Fourier series method
(R2,unit9,Q19)
16)What is a window and why it is necessary.(R2,unit9,Q21)
17)Name the methods to design FIR filter.
RAJENDRA CHARY 17
18. 18)What is the reasin that FIR filter is always stable.(R1,unit6,Q12)
19)For what type of filters,frequency sampling method is
suitable.(R1,unit6,Q45)
20)What is the advantage of linear phase realization of FIR
filter.(R3,3.30)
filter.(R3,3.30)
RAJENDRA CHARY 18
20. 1)What is Multirate Signal Processing? (A17 Reg Dec 2019)
2)What are the advantages of multirate signal processing? (A14
Supply Nov 2017)
3)What is meant by up sampling and if the Z transform of a sequence
x(n) is x(z), then what is the Z transform of a sequence up sampled
x(n) is x(z), then what is the Z transform of a sequence up sampled
by a factor L?
4)What is multi rate signal processing and if the Z transform of a
sequence x[n] is X(z), then what is the Z-transform of a sequence
down sampled by a factor M.
RAJENDRA CHARY 20
21. 5). Explain the terms up sampling and down sampling
6)What is the need for Anti imaging filter in multi rate signal
processing?
7)How aliasing can be reduced to multirate signal processing?
8)How does sampling rate conversion is done by a non integer
8)How does sampling rate conversion is done by a non integer
factor?
9)What are the basic operations required for sampling rate
conversion.
RAJENDRA CHARY 21
22. 10)Write the expression for output spectrum, Y(ejw) of decimator in
terms of input spectrum, X(ejw). (R3 9.11)
11)Write the expression for output spectrum Y(ejw) of Interpolator in
terms of input spectrum, X(ejw). (R3 9.16)
12)What is anti-aliasing filter. (R3 9.12)
12)What is anti-aliasing filter. (R3 9.12)
13)What is anti-imaging filter. (R3 9.17)
14) What are the special features of DSP processors (R3 11.2)
15) What are the addressing modes of TMS320C5X DSP
Processor.(R3 11.13)
RAJENDRA CHARY 22
23. 16)How is decimation achieved. (R2 unit10,Q16)
17)How is interpolation achieved.(R2 unit10,Q17)
18)If the spectrum of a sequence x(n) is X(w),then what is specctrum
of a signal downsampled by a factor 2. (R2 unit10,Q22)
19) If the Z-transform of a sequence is X(z),then what is the Z-
transform of the sequence downsampled by a factor of D.(R
19) If the Z-transform of a sequence is X(z),then what is the Z-
transform of the sequence downsampled by a factor of D.(R2
unit10,Q23)
20) If the Z-transform of a sequence is X(z),then what is the Z-
transform of the sequence upsampled by a factor of I.(R2
unit10,Q24)
RAJENDRA CHARY 23
24. 21)What is the need of anti aliasing filter prior to downsampling? (R2
unit10,Q30)
22)What is the need of anti imaging filter after upsampling a signal.
(R2 unit10,Q31)
23) Name few architectures used for P-DSPs (R2 unit11,Q9)
23) Name few architectures used for P-DSPs (R2 unit11,Q9)
RAJENDRA CHARY 24
25. Thank you
For Your Attention !
For Your Attention !
Any Questions
RAJENDRA CHARY 25
