(DEC 411) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Time : Three hours INDUSTRIAL MANAGEMENT Maximum : 75 marks Question No. 1 is compulsory and answer any FOUR from the remaining. All questions carry equal marks. 1. Write short notes : (a) (e) (f) (g) (h) Management profession. Partnership firm. Concept of interest. Future worth method. Diminishing balance method. Product analysis. X-chart. EOQ. 2. What are the principles of scientific management? 3. State the features of Joint Stock Company.
4. How do you organise economic evaluation of alternatives? 5. State the reasons for providing depreciation. 6. Enumerate the functions of production planning and control. 7. How do you motivate employees in a concern? 8. Discuss the techniques employed in the selection of employees. 9. Critically examine the stages in the product life cycle. 2 (DEC 411)
(DEC 412) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper II SATELLITE COMMUNICATION Time : Three hours Maximum : 75 marks Answer Question No. 1 is compulsory and any FOUR from the remaining. 1. (a) Define the terms space and satellite. (2) What is the dependence of space on altitude? (2) Define satellite orbit and axes. (2) Define Ascending node and eccentricity. (2) (e) What is a slant range? (2) (f) What is API? (2) (g) Define G/T ratio of an earth station. (2) (h) List the advantages of TDMA. (1) UNIT I 2. (a) State and explain Kepler's laws of planetary motion. The earth rotates once per side real day of 23 hrs 56 min 4.09 sec. Show that the radius of GEO is 42, 164.17 km.
Discuss orbital effects in communication system performance. Explain the location of satellite with respect to the Earth. 3. (a) Explain CDMA. UNIT II Discuss spacecraft antennas. Explain TTC. Compare CDMA, FDMA and TDMA. UNIT III 4. (a) Derive Link power budget equation. Explain VSAT. Describe about system noise temperature. Write short notes on small earth station Antennas. 2 (DEC 412)
UNIT IV 5. (a) Explain DSSS with CBPSK. Write short notes on slow frequency hopping. Explain how acquisition and tracking is done. Discuss practical jammers. 3 (DEC 412)
(DEC 413) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper III MICROWAVE ENGINEERING Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. (a) What are the advantages of microwaves? (2) What is a circulator? (2) What is an isolator? (2) What are the uses of directional coupler? (2) (e) Define Gunn effect. (2) (f) What is a Magnetron? (2) (g) What are the advantages of TWT? (3)
UNIT I 2. (a) Explain the operation of Klystron amplifies. Write short notes on cylindrical magnetron. Explain the operation of TWT and derive its gain. Discuss output power and beam loading of a Klystron. UNIT II 3. (a) Explain the features of shunt or H-plane Tee. Write short notes on Microwave resonators. Write about directional couplers. Discuss Gyrator working. UNIT III 4. Explain the working of (a) PIN diode IMPATT diode. Explain the working of Avalanche transit time diode Crystal detectors. 2 (DEC 413)
UNIT IV 5. (a) Explain different components of Microwave bench. Explain the method of VSWR measurement. Discuss scattering coefficient measurement. Explain the detection of microwaves. 3 (DEC 413)
(DEC 414) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper IV ANTENNAS AND PROPAGATION Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. Write brief notes on : (a) Define isotropic radiator. (2) Define gain and Beam width of an antenna. (3) What is an uniform liner array? (2) What is tapering of array? (2) (e) What is a smart antenna? (2) (f) What is Duct propagation? (2) (g) Define virtual height. (2)
UNIT I 2. (a) What is radiation intensity and explain in terms of poynting vector? Derive an expression for the far field of a half wave dipole of an antenna. Explain the working of travelling wave antenna. Calculate the radiation resistance of an antenna which is radiating 1000 W and drawing current of 5 A. UNIT II 3. (a) Explain directive gain and power gain. Write short notes on uniform linear array. Discuss the effective aperture of antenna. What is the basic principle of Dolph- Tschebyscheff array? UNIT III 4. (a) Explain the principle of Vand Rhombic antennas. Give the applications of reflectors. 2 (DEC 414)
Discuss the features of micro strip antennas. Mention the antennas used in medium frequency range and explain any one in detail. UNIT IV 5. (a) Explain the effect of Earth s magnetic field on Radio wave propagation. Write short notes on critical frequency. What are the atmospheric effects in spacewave propagation? Explain the maximum usable frequency. 3 (DEC 414)
(DEC 415) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Time : Three hours Paper V VLSI Design Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. (a) Compare nmos and pmos. (3) Give the applications of PLA. (2) Draw the Twin - tub structure. (2) What is stick diagram? (2) (e) Define Latch - up. (2) (f) What is photo resist coating and masking? (2) (g) What is Test bench? (2) UNIT I 2. (a) Explain in detail the electrical model of a MOS transistor. Discuss pull-up to pull-down ratio.
Explain BICMOS inverters. Give the relationship between Id s versus Vd s. UNIT II 3. (a) Explain the significance of sheet resistance. Discuss various scaling models. Explain propagation delays. Explain design rules and layout. UNIT III 4. (a) Explain switch logic. Write short notes on Multipliers. Write short notes on Design of an ALU subsystem. Discuss different architectural issues. 2 (DEC 415)
UNIT IV 5. (a) Explain case statement in VHDL with an example. Discuss behavioural design elements. Explain CPLD's. Discuss libraries and packages. 3 (DEC 415)
(DEC 416 A) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper VI COMPUTER NETWORKS Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. Answer ONE question from each Unit. 1. (a) What is Routing? (2) List protocol layers. (3) Define Ethernet. (2) What is network topology? (2) (e) What are the advantages of blue tooth? (2) (f) What is a switch? (2) (g) List the advantages of broadband wireless. (2) UNIT I 2. (a) Explain OSI model. Discuss the error detection and correction.
Explain the working of wireless transmission. Discuss sliding window protocols. UNIT II 3. (a) Explain wireless LANs. Discuss the working of data link layer switching. Explain the significance of multiple access protocols. Explain distance vector routing. 4. (a) Explain OSPF. UNIT III What are the techniques for achieving good quality of service? Discuss internet control protocols. Explain TCP protocol. 2 (DEC 416 A)
UNIT IV 5. (a) Explain the working of electronic mail. Discuss authentication protocols. Discuss e-mail security. Explain public key algorithms. 3 (DEC 416 A)
(DEC 416 B) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Time : Three hours Paper VI SPEECH PROCESSING Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. (a) Define Pitch. (2) What is a sampling theorem? (2) What is an Echo? (2) What do you mean by autocorrelation? (2) (e) What are the types of filters used in speech processing? (2) (f) List the advantages of Delta modulation. (3) (g) What is meant by categoriation of speech sounds? (2) UNIT I 2. (a) Discuss anatomy and physiology of speech production. Discuss short time energy with regard to speech process.
Explain uniform tube model. Discuss pitch period estimation using autocorrelation. UNIT II 3. (a) Explain signal estimation from STFT. Discuss DPCM. Explain the process of pitch estimation based on a comb filter. Discuss instantaneous quantization of speech waveform. UNIT III 4. (a) Explain homomorphic system for convolution. Write short notes on synthesis structure. Discuss spectral root homomorphic filtering. Explain short-time speech analysis. 2 (DEC 416 B)
UNIT IV 5. (a) Discuss spectral features for speaker recognition. Write short notes on vector quantization. Explain the error minimization of speech coding. Discuss any one speaker recognition algorithm. 3 (DEC 416 B)
(DEC 421) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper VII RADAR AND NAVIGATION AIDS Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. Write briefly on : (a) What is Range ambiguity? When does it occur? (2) What is a Clutter? (1) Define CFAR. (2) What is meant by pulse compression? (2) (e) Mention some applications of radar. (2) (f) What is Doppler effect? (2) (g) What is range gating? (2) (h) Define blind speed. (2) UNIT I 2. (a) Derive the simple radar range equation. Explain the effect of Altimeter.
Explain minimum detectable signal and receiver noise. Discuss PRF and range ambiguities. UNIT II 3. (a) Explain clutter attenuation. How does the mono pulse tracking takes place? Explain. Write short notes on Doppler filter banks. Discuss about sequential lobing. UNIT III 4. (a) Explain the working of a super heterodyne receiver. Discuss stealth applications. Explain the function of Radomes. Discuss the effect of noise jamming. 2 (DEC 421)
UNIT IV 5. (a) Draw the block diagram of ILS and explain its function. Explain about LORAN navigation system. Explain the Automatic direction finder with a block diagram. Write short notes on OMEGA. 3 (DEC 421)
(DEC 422) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper VIII OPTICAL COMMUNICATION Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. Write briefly on : (a) List the advantages of ray optics theory. (2) Define group delay. (2) Define responsiorty of a photodetector. (2) Define fiber attenuation. (2) (e) What are the types of bends? (2) (f) Differentiate step index and Graded index fibre. (3) (g) Define refractive index. (2) UNIT I 2. (a) Explain the significance of Acceptance angle and critical angle. Discuss different modes of propagation.
Draw the structure of single step index fiber with typical dimensions and explain its features. Discuss different fiber material. UNIT II 3. (a) Explain the inter model and intramodel. Write short notes on fiber optic couplers. Write short notes on fiber optic switches. Discuss scattering and bending losses in fibers. UNIT III 4. (a) Explain the salient features of Edge emitting super luminescent LED. Discuss Avalanche photodiode and its characteristics. Write short notes on modulation bandwidth and reliability of LED. Explain the working of a DH injection laser. 2 (DEC 422)
UNIT IV 5. (a) Explain the digital receiver performance. Discuss OTDR. Discuss different preamplifier types. Write short notes on dispersion losses in fiber measurement. 3 (DEC 422)
(DEC 423) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper IX MOBILE AND CELLULAR COMMUNICATION (WAVES) Time : Three hours Maximum : 75 marks Answer Question No. 1 compulsorily. (15) Answer ONE question from each Unit. (4 15 = 60) 1. Write briefly on the following : (a) Give the equation for C/I ratio. (2) What are the features of omni directional antenna system? (2) What is the effect of long distance propagation? (3) What are the difficulties in propagation over water? (2) (e) What is an Access channel? (2) (f) List the advantages of CDMA system. (2) (g) What are the advantages of fixed channel assignment? (2)
UNIT I 2. (a) Explain the significance of mobile radio communication. Discuss the methods involved in improving coverage and capacity in cellular systems. Explain the channel assignment strategies. What will be the effect of interference on the system capacity? UNIT II 3. (a) Explain reflection and diffraction scattering. Discuss frequency diversity. Distinguish linear equalizers and nonlinear equalizer. Explain the fading effects due to multipath time delay. UNIT III 4. (a) Explain base station system of GSM. Discuss the location tracking of GSM. Explain IS-95 architecture. Discuss the network and switching sub system of GSM. 2 (DEC 423)
UNIT IV 5. (a) Distinguish 3G and 2.5G services. Explain WAP model. Explain the working of GPRS functional groups. Discuss upper layer and link layer of CDMA. 3 (DEC 423)
(DEC 424 A) B.Tech. DEGREE EXAMINATION, MAY 2011. (Examination at the end of Final Year) Electronics and Communication Engineering Paper X DIGITAL IMAGE PROCESSING Time : Three hours Maximum : 75 marks Answer question No.1 compulsory. (15) Answer ONE question from each Unit. (4 15 = 60) 1. (a) What do you mean by Quantization? (2) What are linear operations? (2) List few properties of fourier transform. (3) What is the advantage of sharpening? (2) (e) Distinguish spatial and frequency filtering. (2) (f) What is meant by Adjacency of a pixel? (2) (g) What is an image restoration? (2) UNIT I 2. (a) Discuss the fundamental steps of Digital image processing. What are non-linear operations?
Discuss the elements of visual perception. List the fields that uses digital image processing. UNIT II 3. (a) Explain about Histogram processing enhancement. Discuss sharpening frequency domain filters. Explain smoothing spatial filters. Discuss about ideal high pass filters. UNIT III 4. (a) Discuss the restoration of an image in the presence of Noise. Explain Error-free compression. Explain about Lossy compression. Discuss periodic Noise reduction by frequency domain filtering. 2 (DEC 424 A)
UNIT IV 5. (a) Explain the detection of discontinuities. What are the representation schemes? Discuss edge based segmentation. What are boundary descriptors? Explain. 3 (DEC 424 A)
(DEC 424 B) B.Tech. DEGREE EXAMINATION, MAY 2011 (Examination at the end of Final Year) Electronics and Communication Engineering Paper X MICROCONTROLLERS AND EMBEDDED SYSTEMS Time : Three hours 1. Write brief notes on the following : Maximum : 75 marks (a) List the various software resources in ES. (2) What is pipelined architecture? (2) How are the interrupts masked? (2) What are the register banks in 8051 microcontroller? (2) (e) Define EQU and HLDA. (3) (f) Why ES are realized as real time systems. (2) (g) What is a mailbox? (2) UNIT I 2. (a) Discuss different addressing modes of 8051 micro controller. Explain CPU timings of 8051.
Explain memory organization of 8 bit micro controller. Discuss the interrupt priorities. UNIT II 3. (a) Explain the modes of operation of serial port. Discuss the features of 1 2 C. Explain input and output device interfaces. Write short notes on USB. UNIT III 4. (a) Discuss in brief components of ES. Write short notes on OS security issues. Explain Hard and Soft real time ES. Write short notes on Semaphores. UNIT IV 5. (a) Explain the working of a Automatic Vending machine. Discuss the issues involved in designing ES. 2 (DEC 424 B)
Explain the mechanism of writing drivers for printers. Discuss smart card working. 3 (DEC 424 B)