(DEC 411)(c) Draw the equivalent circuit of magic Tee and discuss its characteristics. (d) Explain the Faraday Rotation isolator. UNIT III 4. (a) Explain the features of microwave

(DEC 411)

B.Tech. DEGREE EXAMINATION, JUNE 2010.

Final Year

Electronics and Communication Engineering

INDUSTRIAL MANAGEMENT

Time : Three hours Maximum : 75 marks

Answer Question No.1 Compulsory.

(15)

Answer ONE question from each Unit.

(4 × 15 = 60)

1. (a) Concept of Management.

(b) Compound interest.

(c) Net present value.

(d) Depletion.

(e) Production function.

(f) C-chart.

(g) ‘X’ theory.

(h) ABC analysis.

(DEC 411) 2

UNIT I

2. (a) Discuss the functions of management

logically.

Or

(b) What are the formalities involved in the

formation of joint stock company.

UNIT II

3. (a) State different methods of providing

depreciation.

Or

(b) Bring out basics methods of economic

evaluation of alternatives.

UNIT III

4. (a) Discuss different types of control charts for

quality control.

Or

(b) Elucidate the significance of job analysis in

personnel function.

(DEC 411) 3

UNIT IV

5. (a) Describe the steps involved in market

research.

Or

(b) Give an account of purchase procedure

followed in a company.

———————

(DEC 412)


Final Year


Paper II — SATELLITE COMMUNICATION


Answer Question No. 1 compulsorily.

(1 × 15 = 15)


(4 × 15 = 60)

1. (a) What are the advantages of geosynchronous

satellites? (3)

(b) Define Azimuth and Elevation angle. (2)

(c) What do you mean by the sun-transit

outage? (2)

(d) Define pitch and yaw. (2)

(e) Define eccentricity and assending node. (2)

(f) What are Ionospheric losses? (2)

(g) Define G/T ratio of an earth station. (2)

(DEC 412) 2

UNIT I

2. (a) State and explain Kepler’s laws of planetary motion.

(b) Explain orbital perturbation.

Or

(c) What do you mean by look angles? Explain them with reference to a geo-stationary satellite and the earth station.

(d) Give a brief history of satellite communications.

UNIT II

3. (a) What are attitude and orbit control sub system? Explain how they perform their functions.

(b) Explain the features of FDMA.

Or

(c) Compare CDMA and TDMA.

(d) Explain why (TT and C) telemetry, tracking and command are necessary for a satellite system.

UNIT III

4. (a) Briefly explain the sources of noise in satellite communication.

(b) Explain VSAT.

Or

(DEC 412) 3

(c) Discuss earth station design.

(d) Derive general link equation. Find out the

expressions for C/N and G/T ratios.

UNIT IV

5. (a) Explain acquisition and tracking.

(b) Discuss fast frequency hopping.

Or

(c) Explain practical jammer types.

(d) Discuss DSSS with CBPSK.

——————

(DEC 413)


Final Year


Paper III — MICROWAVE ENGINEERING


Answer question No. 1 compulsorily.


1. (a) What is a circulator? (2)

(b) What are the applications of isolators? (2)

(c) Define VSWR. (2)

(d) Draw the figure of a PIN diode. (3)

(e) Define Transit time of a klystron. (2)

(f) Draw a series of E-plane tee. (2)

(g) List the applications of crystal detectors. (2)

UNIT I

2. (a) Explain the function of a Klystron amplifier.

(b) Write note on CFA.

Or

(DEC 413) 2

(c) Explain the cylindrical magnetron.

(d) Derive an expression for output current and

output power of two cavity klystron.

UNIT II

3. (a) Explain the function of Directional couplers.

(b) With a neat figure discuss about cylindrical

cavity resonators.

Or

(c) Draw the equivalent circuit of magic Tee and

discuss its characteristics.

(d) Explain the Faraday Rotation isolator.

UNIT III

4. (a) Explain the features of microwave tunnel

diode.

(b) Discuss the varactor diodes and mention few

applications of the same.

Or

(c) With a neat figure explain IMATT diode.

(d) Explain the modes of operation of a GUNN

diode.

(DEC 413) 3

UNIT IV

5. (a) Explain the method to measure medium and

high microwave powers.

(b) Calculate the SWR of a transmission system

operating at 8GHz. The distance between

twice minimum power points is 0.9 mm on a

slotted line whose velocity factor is unity.

Or

(c) Explain the determination of cavity Q by

VSWR measurement.

(d) Discuss the component of microwave bench.

——————

(DEC 414)


Final Year


Paper IV — ANTENNAS AND PROPAGATION


Answer Question No.1 Compulsorily and ONE question

from each Unit.

1. (a) Define field radiation pattern. (2)

(b) Define Directivity. (2)

(c) What do you mean by Radiation resistance?

(2)

(d) What is the length of dipole? (2)

(e) What is a Binomial array? (2)

(f) List the advantage of rhombic antenna. (3)

(g) Define critical frequency. (2)

(DEC 414) 2

UNIT I

2. (a) The radiation resistance of an antenna is

72Ω and the loss resistance is 8Ω . What is

the Directivity if the power gain is 16?

(b) Derive an expression for the power radiated

by current element.

Or

(c) Discuss the effect of the point of feed on

standing wave antenna.

(d) Explain the features of Travelling wave

antennas.

UNIT II

3. (a) Explain the terms related to antenna

(i) Effective length

(ii) Effective aperture

(iii) HPBW.

(DEC 414) 3

(b) Obtain the relation between maximum

effective aperture and directivity.

Or

(c) Discuss Antenna polarisation.

(d) Explain the effect of earth on vertical

patterns.

UNIT III

4. (a) Explain with a neat sketch log periodic

dipole array.

(b) Discuss the basic principles of micro strip

antenna.

Or

(c) Explain working of YAGI-UDA array.

(d) Explain the features of paraboloid cylinder.

UNIT IV

5. (a) Discuss the salient features of space wave

propagation.

(b) Discuss Gyro frequency.

Or

(DEC 414) 4

(c) Explain the Refraction and reflection of Sky

wave by the ionosphere.

(d) Discuss Duct propagation and Radio-

Horizon.

———————

(DEC 415)


Final Year


Paper V — VLSI DESIGN



(1 × 15 = 15)


(4 × 15 = 60)

1. (a) Define Threshold voltage. (2)

(b) Define latch-up. (2)

(c) Compare nMOS and pMOS. (3)

(d) Define rise time and fall time. (2)

(e) List the applications of PLAS. (2)

(f) What do you mean by DFT? (2)

(g) What is a pull down device? (2)

(DEC 415) 2

UNIT I

2. (a) Explain the principle of CMOS inverter with

V-I waveform.

(b) Explain how cost and delay of a logic gate

varies with different IC technologies.

Or

(c) Discuss Latch-up in CMOS circuit.

(d) Explain dsI versus dcV relationships.

UNIT II

3. (a) Discuss stick diagram.

(b) Explain scaling factors for device

parameters.

Or

(c) Explain propagation delays.

(d) Explain design rules and layout.

UNIT III

4. (a) What are the various simulators used for

combinational logic? Explain their need.

(b) Compare merits and demerits of various

switch logic circuits.

Or

(DEC 415) 3

(c) Briefly explain the architecture testing

related architecture VLSI design.

(d) Write note on adders and multipliers.

UNIT IV

5. (a) Compare the different types of ASICs.

(b) Explain CPLDs.

Or

(c) Write note on libraries and packages.

(d) Explain Gate array based ASICs.

——————

(DEC 416 A)


Final Year


Paper VI — COMPUTER NETWORKS


Answer Q. No. 1 compulsorily.

Answer ONE Question from each Unit.

1. (a) What is the use of the transport layer

protocol? (2)

(b) Distinguish between forwarding and routing.

(3)

(c) What is cyclic Redundancy check (CRC)

code? (2)

(d) What is polyaphabetic encryption? (2)

(e) What is network management? (2)

(f) How is HTTP similar to SMTP? (2)

(g) Name the layers of OSI model. (2)

UNIT I

2. (a) Explain the various services provided by OSI

model layers.

(b) Discuss sliding window protocols.

Or

(DEC 416 A) 2

(c) Write note on wireless transmission.

(d) Explain Error detection and correction in

data link layer.

UNIT II

3. (a) Explain Broadband wireless.

(b) Discuss the method of shortest path routing.

Or

(c) Give the significance of Blue tooth.

(d) Explain Hierarchical Routing and Broadcast

Routing.

UNIT III

4. (a) Discuss on various internet control protocols.

(b) Explain TCP transport protocol.

Or

(c) Explain the techniques for achieving good

quality of service.

(d) Explain RTP.

UNIT IV

5. (a) Explain electronic mail.

(b) Write note on Digital signature.

Or

(DEC 416 A) 3

(c) Discuss different Authentication Protocols.

(d) List different web security threats and

explain to get rid of them.

———————

(DEC 416 B)


Final Year


Paper VI — SPEECH PROCESSING


Answer Question No. 1 Compulsorily.

(1 × 15 = 15)


(4 × 15 = 60)

1. (a) What is speech signal processing?

(b) Define Acoustics of speech production.

(c) What is Tube concatenation?

(d) What is the significance of pitch in speech

processing?

(e) What is the role of short time analysis?

(f) How Delta modulation needed in the speech

processing?

(g) What is convolution?

(DEC 416 B) 2

(h) Define speech analysis.

(i) What is linear prediction?

(j) What is the use of Lattice filter?

(k) What is vector Quantization?

(l) What is Distortion measure?

(m) What is Speaker Recognition?

(n) List out the features for the speaker

Recognition.

(o) What is the significance of minimum -

distance classifier?

UNIT I

2. (a) Discuss uniform tube model.

(b) Explain Discrete-Time model based on Tube

concatenation.

Or

3. Explain the following :

(a) Zero crossing Rate

(b) Pitch period estimation using autocorrelation.

(DEC 416 B) 3

UNIT II

4. Discuss the following :

(a) Signal estimation from STFT.

(b) Frequency Domain pitch estimation.

Or

5. Explain Delta modulation and DPCM in detail.

UNIT III


(a) Homomorphic systems for convolution.

(b) Spectral root homomorphic filtering.

Or


(a) Short-time Homomorphic analysis.

(b) Short-time speech analysis.

(DEC 416 B) 4

UNIT IV

8. (a) Explain Error Minimization and Distortion

measure sub-bond coding in detail.

(b) Discuss Levinsen Recursion and Vector

Quantization.

Or

9. What are the spectral features of Speaker

Recognition? Explain Speaker Recognition

Algorithms.

———————

(DEC 421)


Final Year


Paper VII — RADAR AND NAVIGATIONAL AIDS



(1 × 15 = 15)


(4 × 15 = 60)

1. (a) What is Range ambiguity? (1)

(b) Define Doppler effect. (2)

(c) What is a clutter? (1)

(d) What is Radar? (1)

(e) What is FM CW altimeter? (1)

(f) What is the function of Adcock antenna? (1)

(g) What are the equipments that are used in

VOR receiver? (1)

(h) What do you mean by LORAN–A? (1)

(i) What is the function of Localizer? (1)

(DEC 421) 2

(j) What are the types of landing system? (1)

(k) What are the drawbacks of ILS? (2)

(l) Mention some application of Radar. (2)

UNIT I

2. (a) Derive the simple radar equation.

(b) Discuss the limitations of CW Radar.

Or

(c) Explain minimum detectable signal and

receiver noise.

(d) Write short notes on Radar Cross section of

targets.

UNIT II

3. (a) Explain with a block diagram a non-coherent

MTI Radar.

(b) Explain Doppler fitter banks.

Or

(c) Explain N-pulse delay line canceller.

(d) Explain conical scan tracking.

(DEC 421) 3

UNIT III

4. (a) Explain Radomes.

(b) Explain with a block diagram the receiver

protector.

Or

(c) Discuss Noise jamming.

(d) Explain electronic counter to counter

measures.

UNIT IV

5. (a) Explain in detail about LORAN navigation

system.

(b) Discuss about automatic direction finder.

Or

(c) Explain TACAN secondary radar systems.

(d) Draw the block diagram of ILS and explain.

——————

(DEC 422)


Final Year


Paper VIII — OPTICAL COMMUNICATION


Answer question No. 1 compulsorily.

(1 × 15 = 15)


(4 × 15 = 60)

1. (a) List advantages of optical fibers. (2)

(b) Define critical angle fiber. (2)

(c) What do you mean by fiber attenuation? (2)

(d) Draw the structure of an optical fiber. (2)

(e) What are the causes for absorption? (2)

(f) What is meant by leaky modes? (2)

(g) List advantages of photo diode. (3)

(DEC 422) 2

UNIT I

2. (a) Explain with a neat block diagram the

fundamentals of optical fiber

communications.

(b) Discuss briefly about linearly polarized

modes.

Or

(c) Discuss different fiber types.

(d) Explain total internal reflection and

Numerical operator.

UNIT II

3. (a) Explain the scattering and bending losses

that occur is an optical fiber with relevant

diagrams.

(b) Discuss fiber optic couples.

Or

(c) Explain inter model.

(d) Discuss different fiber optic switches.

UNIT III

4. (a) Draw the structure of Edge-Emitting LED

and explain the operation.

(b) Explain the working of a DH injection laser.

(DEC 422) 3

Or

(c) With a neat sketch explain the principle of

operation of Avalanche photodiode.

(d) Explain the output spectrum and modulation

bandwidth of a LED.

UNIT IV

5. (a) Explain LED drive circuits.

(b) Discuss Numerical aperture and attenuation.

Or

(c) Explain in detail the Link power – budget of

a fiber optic point to point.

(d) Explain digital receiver performance.

———————

(DEC 423)


Final Year


Paper IX — MOBILE AND CELLULAR

COMMUNICATION (Waves)


Answer ALL questions.

1. (a) Define dropped call rate. (2)

(b) What do you mean by voice quality? (2)

(c) What is paging channels? (2)

(d) Define µ for a signal cell. (2)

(e) What is mean by hand offs? (2)

(f) Define Dynamic splitting. (2)

(g) What do you mean by Location tracking? (3)

UNIT I

2. (a) Write notes on cordlers telephones systems.

(b) Explain the concept of frequency reuse of

channels.

Or

(DEC 423) 2

(c) Explain how to improve the coverage in

cellular systems.

(d) Discuss the paging system.

UNIT II

3. (a) Explain about small scale multi path

propagation.

(b) Discuss Non-linear equalizers.

Or

(c) Explain Diffraction scattering.

(d) Discuss Decision feedback equalizers.

UNIT III

4. (a) Discuss in detail mobile station.

(b) Explain Location Tracking and cell set up.

Or

(c) Discuss the role of Radio interference.

(d) Explain Network and switching sub system.

(DEC 423) 3

UNIT IV

5. (a) Explain 2.5 G mobile series.

(b) Discuss WAP protocol.

Or

(c) Give a note on CDMA 2000 layering

structure.

(d) Explain GPRS architecture.

———————

(DEC 424 A)


Final Year

Electronics & Communication Engineering

Paper X – DIGITAL IMAGE PROCESSING


Answer Question No.1 compulsorily.

(15 marks)

Answer ONE question from each unit.

(4 × 15 = 60) 1. (a) What is Sampling theorem? (2)

(b) What is an image filter? (2)

(c) Define a Pixel (2)

(d) What is a Grey level image? (2)

(e) Define Restoration (2)

(f) Define Fidelity criteria (3)

(g) What do you mean by connectivity? (2)

UNIT I

2. (a) Explain the fundamental steps in Digital

image processing.

(b) What do you mean by linear operations?

Explain.

(Or)

(DEC 424 A) 2

(c) Explain the terms Adjacency, Boundaries

and Rotation in the aspect of digital images.

(d) Discuss the elements of visual perception.

UNIT II

3. (a) Explain fourier transform is useful in image

enhancement.

(b) Explain the enhancement by point

processing.

(Or)

(c) Explain sharpening spatial filters.

(d) Discuss how to obtain smoothing image in

frequency domain.

UNIT III

4. (a) Explain how wiener filtering is helpful in

image processing.

(b) Discuss lossy compression.

(Or)

(c) Explain how image can be restored in the

presence of Noise.

(d) Explain error free compression.

(DEC 424 A) 3

UNIT IV

5. (a) Define Thresholding and explain its

significance in segmentation.

(b) Explain one method for Boundary detection.

(Or)

(c) Explain region oriented segmentation

(d) Explain any one boundary descriptors.

———————

(DEC 424B)


Final Year


Paper X — MICROCONTROLLERS and EMBEDDED

SYSTEMS


Answer questions No.1 compulsorily.

and Answer ONE question from each Unit.

1. (a) List interrupt priorities. (2)

(b) List different types of memories. (2)

(c) Define Mutex. (2)

(d) List OS security issues. (3)

(e) What is the function performed by gate

signal in 8254 times? (2)

(f) What are the register banks in 8051

microcontroller? (2)

(g) What are the parameters used to

characterize a real time task? (2)

(DEC 424B) 2

UNIT I

2. (a) Explain different addressing modes of

microcontroller.

(b) Discuss interrupt priorities.

Or

(c) Explain the memory organization of

microcontroller.

(d) Discuss CALL instructions.

UNIT II

3. (a) Discuss different modes of serial port

operation.

(b) Explain USB.

Or

(c) Explain input and output device interface.

(d) Explain RS 232 C.

UNIT III

4. (a) Draw and explain the CPU architecture of

ARM processor.

(b) Explain semaphores.

Or

(c) Write short notes on message queue.

(d) Discuss mail boxes.

(DEC 424B) 3

UNIT IV

5. (a) Explain interrupt service mechanism.

(b) Discuss writing drives for printers.

Or

(c) Explain the Automatic Vending Machine.

(d) What are the issues involved in designing

ES?

——————

Documents

(DEC 411)(c) Draw the equivalent circuit of magic Tee and discuss its characteristics. (d) Explain the Faraday Rotation isolator. UNIT III 4. (a) Explain the features of microwave