B.TechSemester 52022-23Digital Signal ProcessingKEC503

Digital Signal Processing (KEC503) - AKTU Question Paper 2022-23

B.Tech · Semester 5 · Free PDF Download

This is the official AKTU Digital Signal Processing Previous Year Question Paper for B.Tech Semester 5, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 5

Session:2022-23

University:AKTU / UPTU

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Questions Asked in 2022-23

Digital Signal Processing (KEC503) — complete question paper

Section AAttempt all questions in brief. 2 x 10 = 20

a
Explain the basic elements r equired for realization of digital system
b
Differentiate between recur sive and non-recursive systems
c
Calculate the DFT of the s equence x(n) = {1, 2, 1, 3}
d
What is Twiddle factor? Write its properties
e
What is the difference between circular convolution and lin ear convolution?
f
What is Frequency Warping?
g
Demonstrate the term Gibb’s Phenomenon with schematic diagram
h
Write the expression for Hanning window. (i) Explain the term Decimat ion with suitable example. (j) Find the output of the sequence [1 2 3] after up sampling b y a factor N=3

Section BAttempt any three of the following: 10 x 3 = 30

a
Determine DF – I & DF – II realization for a following IIR transfer function
b
Explain Impulse response inva riance method of IIR digital f ilter design. Also explain mapping of poles from analog domain to digital domain
c
Explain finite word length e ffect in digital filters. Also explain (i) Coefficient quantization error (ii) Quantization noise – truncation and rounding
d
Derive and draw the flow gra ph for DIT FFT algorithm for N=8
e
Discuss QMF and sub-band coding of speech signals in detail

Section CAttempt any one part of the following: 10 x 1 = 10

a
Obtain direct form and casc ade form realization for the t ransfer function of a FIR system given by
b
(i) Explain the technologi es used for DSP in detail. (ii) Compare IIR and FIR digital filters
a
Using bilinear transformati on, design a Butterworth filter which satisfies the following conditions
b
Obtain system function of digital filter which is resonant at 𝜔௥ ൌ Bilinear Transformation from the system function of analog filter given as
a
Design a symmetric FIR low pass digital filter whose desired frequency response is as- The length of the filter is 7 and 𝜔௖ ൌ 1 𝑟𝑎𝑑𝑖𝑎𝑛 /𝑠𝑎𝑚𝑝𝑙𝑒. Use rectangular window function
b
Explain the concept of the Limit Cycle Oscillations & dead band effect with suitable example
a
Determine the DFT of the sequence x(n) = {1, 1, 2, 2, 3, 3} and determine the corresponding amplitude and phase spectrum
b
Find the DFT of the followi ng discrete time sequence using DIF FFT algorithm
```
x(n)= {1, -1, -1, -1, 1, 1, 1, -1}
```
a
Calculate the circ ular convolution using graphical method for x(n) = [1, 2, 3, 4] and h(n) = [4, 3, 2, 1]
b
Explain the process of mul tirate signal processing in detai l. Also enlist the advantages of multirate signal processing

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KEC503

Questions that appeared in more than one session, found by comparing 3 years of Digital Signal Processing papers (2021-22, 2022-23, 2023-24)

Differentiate between recur sive and non-recursive systems