(DEC 411) - anucde.info · ... Name a few applications of Directional coupler. e) ... Explain the operation of TWT with neat diagram. b) ... Derive the Scattering matrix for series

(DEC 411)

B.Tech. DEGREE EXAMINATION, DEC. - 2013

(Examination at the end of Final Year)

Electronics and Communication Engg.

Paper - I : INDUSTRIAL MANAGEMENT

Time : 03 Hours Maximum Marks : 75

Answer question No. 1 is comulsory and Four from remaining.

All questions carry equal marks.

1) Write short notes on:

a) Joint Stock Company

b) Depreciation

c) Control Charts

d) EOQ

e) Marketing

2) Explain the concept of management along with the functions?

3) Explain the salient features of sole proprietorship?

4) Explain the basic methods of annual equivalent method?

5) What are the various method of deprecation explain it?

6) What is production management and describe the types of production systems?

7) Explain the concept and types of Inspection?

8) Explain the functions of personnel management?

9) What are the different methods of channels of distribution?

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(DEC 412)




Paper – II : SATELLITE COMMUNICATION


Answer Question No. 1 compulsory [15]

Answer One Question from each section [4 x 15 = 60]

1) a) Give Kepler’s laws of planetary motion.

b) What are orbital elements ?

c) Explain CDMA

d) What is C/N ratio of satellite links ?

e) Explain probability of errors

f) Explain DSSS

g) Explain slow frequency hopping

SECTION – A

2) a) Give brief history of satellite communication.

b) Explain about launch and launch vehicles.

(OR)

3) a) Explain about orbital perturbations

b) Explain about the different types of orbits

SECTION – B

4) a) Explain about space craft sub systems

b) Explain about CDMA encoder and decoder

(OR)

5) a) Compare CDMA, FDMA & TDMA

b) Explain Space DAMA satellite system

SECTION – C

6) a) Explain system noise temperature and G/T ratio.

b) Explain about small earth station antennas.

(OR)

7) a) Explain the design of uplink and downlink models.

b) Explain about the equipment for earth stations.

SECTION – D

8) a) Explain FHSS

b) Explain Acquisition and tracking

(OR)

9) a) Explain the types of practical jammer

b) Explain THSS

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(DEC 413)



ELECTRONICS & COMMUNICATION ENGINEERING

Paper – III : Microwave Engineering


Answer Question No. 1 Compulsory (15)

Answer ONE question from each unit (4 × 15 = 60)

1) a) Explain bunching process in brief.

b) Expand IMPATT and TRAPATT.

c) Draw the diagram of two cavity klystron amplifier.

d) Name a few applications of Directional coupler.

e) What is Faraday rotation?

f) Explain the necessity of Isolator.

g) What are the dominant modes of TE and TM in rectangular waveguides and

draw one of the mode pattern.

UNIT - I

2) a) Draw and explain two cavity klystron amplifier.

b) Explain the qualitative analysis of BWO.

OR

3) a) Explain the operation of TWT with neat diagram.

b) Explain the bunching process involved in Reflex klystron amplifier with the

help of Applegate diagram.

UNIT - II

4) a) Explain about Magic Tee and derive its S-matrix.

b) What is the magic associated with magic Tee.

OR

5) a) Derive the Scattering matrix for series (or) E-plane Tee.

b) Explain the operation of Gyrator with neat diagram.

UNIT - III

6) a) What are the modes of oscillation of a Gunn diode? Explain with necessary

diagrams and conditions for oscillations.

b) Explain about varactor diodes.

OR

7) a) Justify the classification of IMPATT under Avalanche Transit Time devices.

b) What are transferred electron devices? List out the conditions for RWH

theory to be satisfied by a semi conductor material.

UNIT - IV

8) a) With a suitable diagram of microwave bench set-up using slotted line,

explain how VSWR for a given load can be measured.

b) List out the necessary precautions for setting a reflex klystron based

microwave bench for lab measurements.

OR

9) a) With the help of necessary experimental set up, describe the measurement of

Unknown load impedance.

b) With the help of necessary experimental set up, describe the measurement of

Power.

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(DEC 414)

B.Tech. Degree Examination, DEC. - 2013


Electronic & Communications Engg.

Paper - IV : ANTENNAS AND PROPAGATION


Answer Question No. 1 is compulsory. [15]

Answer ONE question from each unit [4 × 15 = 60]

1) a) What is the basic principle of small circular loop antenna.

b) Give any 2 applications of short antennas.

c) What is directive gain?

d) Give the equation of First transmission and explain shortly.

e) What is radiation efficiency?

f) Short notes on effect of earth on vertical patterns.

g) Give applications of parabolic reflector antennas.

h) What is Skip distance.

i) Explain about Binary array.

UNIT I

2) a) Explain and derive power radiated by currect element.

b) Explain about the heuristic approach in potential function.

OR

3) a) Explain the basic principle of small circular loop antenna.

b) Explain the radiation from monopole and half wave dipole.

UNIT II

4) a) Explain radiation intensity and power gain.

b) Derive beam width of an end fire array.

OR

5) a) Write the relation between maximum effective aperture and directivity.

b) Explain the principle of multiplication of patterns.

UNIT III

6) a) Explain uniform linear array.

b) Explain the basic principle of Slot antennas and micro strip antennas.

OR

7) a) Explain basic principle of Dolph-Tschebyscheff array.

b) Explain Cassegrain system of reflectors.

UNIT IV

8) a) Explain variation of field strength with height in space wave propagation.

b) Explain atmospheric effects in space wave propagation.

OR

9) a) Explain about Duct propagation.

b) What is Gyro frequency? Explain reflection and refraction of sky waves by

the Ionosphere.

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(DEC 415)

B.Tech. DEGREE EXAMINATION, DEC. 2013


Electronics and Communication Engineering

Paper – V: VLSI DESIGN

Time: 03 Hours Maximum Marks: 75

Answer Question No.1 compulsory

Answer One question from each Unit.

[15]

[4 x 15 = 60]

1) a) What is Moore’s law in VLSI circuits.

b) Draw the stick diagram for ( )( )y a b c d= + + for CMOS logic

c) What is Figure of merit.

d) What is delta delay for digital circuits.

e) Expand CPLD, FPGA, ASIC, PLA and PAL.

f) Write the syntax for If-else statement in HDL.

g) What is sheet resistance.

UNIT - I

2) a) Explain with neat diagrams the CMOS transistor fabrication process.

b) What is Latchup in CMOS circuits. Explain.

(OR)

3) a) Explain the process of BiCMOS fabrication in an n-well process.

b) Write brief note on:

i) Pass transistor

ii) Figure of merit

iii) Transconductance

UNIT - II

4) a) Draw the stick diagram and a mask layout for an 8:1 nMOS inverter circuit.

Both the input and output points should be on the Poly silicon layer. Also

explain the diagram.

b) How do we estimate CMOS inverter delay?

OR

5) a) What are the effects of scaling on device parameters? Derive the expressions

of parameters.

b) Draw the stick diagram and layout for NMOS inverter.

UNIT - III

6) a) Explain the principle of multiplication in Booth Multiplier.

b) Draw the Schematic and mask layout of array adder used in Booth Multiplier.

OR

7) a) Design a magnitude comparator based on the data path operators.

b) Explain about design of an ALU subsystem.

UNIT - IV

8) a) Draw a neat CPLD cell structure and explain.

b) What are the different types of ASICs and the design constraints?

OR

9) a) Write note on HDL design circuits: Package body and declaration.

b) Write a brief note on :

i) Critical path delay in a design.

ii) Behavioral model Vs. structured model in HDL.

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(DEC416A)

B. Tech. DEGREE EXAMINATION, DEC. – 2013



Paper - VI : COMPUTER NETWORKS


Answer Question No. 1 compulsory (15)



a) Transmission media

b) RTP

c) Cryptography

d) E – mail

e) Symmetric key

Unit - I

2) Explain OSI reference model.

OR

3) Explain sliding window protocols.

Unit - II

4) Explain Wireless LANS and bluetooth.

OR

5) Explain about link state routing and distance vector routing.

Unit - III

6) Discuss about TCP.

OR

7) Explain any two congestion control algorithms.

Unit - IV

8) Explain any one public key algorithm with example.

OR

9) Discuss about digital signatures and multimedia.

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(DEC 416B)




Paper – VI : SPEECH PROCESSING


Answer Question No. 1 is compulsorily (15)



a) Define step size.

b) What is meant by categorization of speech sounds?

c) What is format?

d) What is the filter, what are the types of filters?

e) What is meant by auto – correlation.

f) Define acoustics of speech production.

g) What is meant by quantization?

h) What is subband coding?

i) What is speech communication?

j) Define a Discrete – Time signal.

k) What is meant by quantization?

l) What are the domain models for speech processing?

m) What is the significance of minimum distance classifier?

UNIT - I

2) a) Discuss anatomy and physiology of speech production.

b) Discuss how to produce the speech sounds.

OR

3) Explain time-domain models for speech processing.

UNIT - II

4) a) Explain the concept of delta modulation.

b) Write short note on Instantaneous quantization.

OR

5) a) Discuss instantaneous quantization of speech waveform.

b) Explain about signal estimation from the modified STFT.

UNIT - III

6) a) Explain short – time speech analysis.

b) Explain spectral root homomorphic filtering.

OR

7) a) Explain about speech analysis and synthesis structures.

b) Explain the concept of short time energy.

UNIT – IV

8) a) Explain briefly about Levinson Recursion.

b) Discuss speaker recognition algorithms.

OR

9) What are the spectral features of speaker recognition?

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(DEC 421)




Paper – VII : RADAR AND NAVIGATIONAL AIDS


Answer Question No. 1 compulsory. (15)

Answer ONE question from each unit. (4×15 = 60)

1) Write briefly on:

a) Draw Monostatic, Bistatic RADAR diagrams.

b) What are the components of Pulsed RADAR Transmitter.

c) Duplexer

d) Elevation angle

e) Range of RADAR

f) PRF (Pulse Repetition Frequency)

g) Radome

h) PPI (Plan Position Indicator)

UNIT - I

2) a) Write short notes on

i) Receiver noise and SNR

ii) Radar cross section of targets

iii) Integration of Radar pulses

OR

b) i) Describe the working principle of Basic Radar System

ii) Explain Maximum Unambiguous Range

iii) What are the applications and limitations of Radar

UNIT – II

3) a) Draw and Explain frequency response of single delay line canceller.

b) Explain sequential lubing.

OR

c) Compare different types of tracking radar systems.

d) Explain conical scanning.

UNIT – III

4) a) Draw and explain superheterodyne receiver.

b) Explain noise jamming.

OR

c) Explain principle of operation of Branch type duplexer.

d) Discuss stealth applications.

UNIT – IV

5) a) Discuss salient features of LORAN.

b) Explain ILS.

OR

c) Give salient features of DECCA.

d) Explain principle of operation of MLS.

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(DEC 422)




Paper – VIII : Optical Communication


Answer Question No.1 compulsorily

Answer ONE question from each Unit

[15]

[4 x 15 = 60]

1) a) Define Acceptance angle.

b) What are the applications of optical fiber?

c) Define Dispersion.

d) Compare between inter model & intra model.

e) Explain the principles of photo detection.

f) What are the limitations of optic sources?

g) What is direct intensity modulation?

UNIT – I

2) a) Explain Step index fiber structure in detail.

b) The core of an optical fiber is made of glass of refractive index 1.55 and in

clad with another glass of refractive index 1.50. Determine.

i) Numerical Aperture

ii) Acceptance angle

iii) Critical angle

OR

3) a) Explain Graded index fiber structure in detail.

b) Calculate the number of modes at 1550nm in a graded index optical having a

parabolic index profile a 20µm core radius.

UNIT – II

4) a) Explain briefly about Scattering losses.

b) Explain about the bending losses in optical fibers.

OR

5) a) Explain about the butt-joined connectors?

b) What are the splicing techniques, which are used for adjoining of optical

fiber.

UNIT – III

6) a) Write the difference between surface and edge emitting LED’s.

b) Explain the principle of operating of LASERS.

OR

7) a) Explain the working principle of the PIN photo detector with neat diagram.

b) Derive the expression for lasing and threshold.

UNIT – IV

8) a) Explain about the digital receiver performance of optical fiber system.

b) Explain the error sources of optical fiber system.

OR

9) a) Explain the operating principle of WDM.

b) Discuss the cut-back method of optical fiber.

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(DEC423)

B.Tech. DEGREE EXAMINATION, DEC - 2013

(Examination at the end of Final Year )


Paper – IX : MOBILE AND CELLULAR COMMUNICATION (WAVES)


Answer Question No.1 compulsory. (15)

Answer ONE Question from each unit (4×15=60)

1) Write briefly on the following:

a) What is Trunking.

b) MTSO (Mobile Telephone Switching Office).

c) Define coverage area.

d) GOS (Grade of service).

e) Write about Dropped Calls.

f) Give relation between delay spread and coherence Bandwidth.

g) Explain 800-MHz-emission noise.

h) What are the basic problems existed in first generation.

UNIT-I

2) a) Explain the components of cellular system.

b) Explain the frequency reuse distance in cellular radio system.

OR

3) a) Discuss evolution of mobile communication systems.

b) Explain Handoff Mechanism.

UNIT-II

4) a) Explain about the different types of fading techniques and how it can

be overcome?

b) Discuss Frequency Diversity Schemes.

OR

5) a) Explain the concept of free space propagation model.

b) Explain about RAKE receiver.

UNIT-III

6) a) Explain the significance of SIM in mobile station.

b) Explain about BSS (Base Station Subsystem) of GSM architecture.

OR

7) a) Write short notes on GSM.

b) Explain about Network and switching Subsystem (NSS) of GSM

architecture.

UNIT-IV

8) a) Write about GPRS architecture.

b) Discuss WAP properties.

OR

9) a) Explain about WAP Gateway.

b) Write about

i) Cordless telephone systems.

ii) Types of small scale fading.

.

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(DEC 424A)




Paper - X : DIGITAL IMAGE PROCESSING


Answer Question No. 1 compulsory (15)


1) a) Name the components present in image processing system.

b) What do you mean by image filtering.

c) Define compression.

d) Define histogram

e) What do you mean by image restoration

f) What do you mean by thresholding

g) What do you mean by image transformation

Unit - I

2) a) Explain the fundamental steps involved in image processing.

b) Explain the elements of visual perception.

OR

3) a) Explain about the basic relationships between pixels.

b) Explain about linear and non linear operations related to image processing.

Unit - II

4) a) Explain about Walsh Hadamard transform and generate Hadamard matrix.

b) Explain the basics of filtering in frequency domain.

OR

5) a) Explain about Histogram specifications.

b) Explain about sharpening of order derivative filters.

Unit - III

6) a) Explain about linear, position invariant degradations.

b) Explain about error free compression model.

OR

7) a) Explain about inverse filtering.

b) Discuss about lossy compression.

Unit - IV

8) a) Discuss about Region based segmentation.

b) Explain about the multi variable thresholding.

OR

9) a) Explain about fourier descriptors in detail.

b) Explain about topological descriptors in detail.

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(DEC424B)




Paper - X : MICROCONTROLLERS AND EMBEDDED SYSTEMS


Answer Question No. 1 compulsorily. (15)

Answer ONE question from each unit. (4×15 = 60)

1) a) What is Micro controller?

b) Write the addressing modes of 8bit microcontroller.

c) What do you mean by tasks?

d) Explain about Mail boxes.

e) What are the OS security issues of embedded systems?

f) Write the issues involved in designing ES.

g) What is a semaphore?

UNIT - I

2) a) Draw and explain Architecture of 8051 microcontroller.

b) Write the memory organization of 8031 family.

OR

c) Write about the interrupt structure and interrupt priorities of Microcontroller.

d) Explain briefly the addressing modes of 8051 microcontroller.

UNIT - II

3) a) Explain serial communication and its mode of operation.

b) Explain about RS 232C serial communication standard.

OR

c) Explain the following buses:

i) ISA ii) PCI

d) Explain Timer/Counter function and its modes of operations.

UNIT - III

4) a) Write the architecture of Embedded system.

b) Write short note on Mutex and message queues.

OR

c) Explain the architecture of the kernel.

d) Explain about the task and task scheduling.

UNIT - IV

5) a) Explain the interrupt service mechanism used in Embedded system.

b) Write the need of writing drivers for printers in Embedded system.

OR

c) Explain the working of a smart card.

d) Write short note on Adaptive cruise control system.

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(DEC 411) - anucde.info · ... Name a few applications of Directional coupler. e) ... Explain the operation of TWT with neat diagram. b) ... Derive the Scattering matrix for series