Download AKTU B-Tech 5th Sem 2018-2019 REC 503 Digital Signal Processing Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 5th Semester (Fifth Semester) 2018-2019 REC 503 Digital Signal Processing Question Paper

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BTECH
(SEM V) THEORY EXAMINATION 2018-19
DIGITAL SIGNAL PROCESSING
Time: 3 Hours 1 T otal Marks: 70
Note: 1. Attempt all Sections. lf require any missing data; then choose suitably.
SECTION A
l. Attempt all questions in brief. 2 x 7 = 14
a) What is the main disadvantage of direct form realization?
b) What is the wraping effect?
0) Compare FIR and HR ?lter?
d) What are the advantages of Kaiser window?
6) What is window and why it is necessary?
f) What is down sampling and up sampling?
/? g) De?ne decimation?
SECTION B
2. Attempt any three of the following: l3 s 7 x 3 = 21
a) Obtain the Cascade form realization- . _ 7
y(n)= y(n?l)? l/2y(n? 2)+l/4y(n~2)+x(n) x(n-l)+x(n? 2) ? :3: ?
b) Find the order and cut off frequency of dgigital ?lter with the following speci?cation- 1;
0.89<= 1 H (ej?JD )|<=1 ,0<;=c?o <=0.4n L
? . \Vixhx? ? ? Iii, 1',
I H (er12018 , 0.61t<= (1) <=1t use the impulse invarian?e method?
c) The desired response efa low?pass ?lter is H d (elm) = 6'31?): , -3"lt/4<= (o <=31t/4
/? Detemiine H(ej??) for M= 7 using a hamming Window.
(I) Find the 8 point DFT of the sequence x(n)= {l l ,,l l l 0, 0 ,0} using DlT FFT?
e) Discuss abothuadrature mirror filters In detail?
SECIIQN c
3. Attempt any one part of the fouovivf?g: 7 x 1 = 7
a) Obtain the parallel form realizatxo?-
(1 +1 / 22 1%}
(1?z"+1/4z?2)(1a,z +1/2z?2)
b) Obtain the Direct form I and II form realization
?1 ??1
11(2): (_ll+z )(1+_212 ) 4
(1+1/22 )(1?1/4z )(1+1/82 )
H(Z)=
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4. Attempt any one part of the following: 7 x l = 7
a) Using bilinear transformation, design a Butterworth ?lter which satis?es the following
condition0.8<= | H(er )|<=1 , 0<= co <=0.21t
I H(er )|<=0.2 , 0.61t<= a) <=1l:
b) What is the difference Butterworth and Chebyshev? Explain the frequency
transformation is done?
5. Attempt any one part of the following: 7 x 1 = 7
a) Using a rectangular window technique design a low pass ?lter with passband gain of unity,
cutoff frequency of 1000 Hz and working at a sampling frequency of 5 kHz. The length of the
impulse response should be 7.
b) Discuss the Finite Word length effects in digital ?lters?
6. Attempt any one part of the following: 7 x 1 = 7
?
. . . . . ?2" . .
a) Find the linear convolution usmg c1rculaI cogvo?i?on 0f the followmg sequence g
x(n)={1,2,1} h(n)={1,2}?
?f?
b) F ind the 8 point DFT of the sequence x(n)={ 1,21%:4321?532,? using DIF FFT?
. ??.. yliv?g Q
E; 2; i
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7. Attempt any one part of the goggivv?ng: 7x1? 7
f
a) What is multirate digital signal Rf ?sing? Discuss about application areaaoEit?:
em
b) Discuss about Interpolation j ainpling rate conversion in detail?
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