Digital Communication Important Questions for Anna Univ 2013 May June Exams

Digital Communication Important Questions for Anna Univ 2013 May June Exams

Important Questions In Digital Communication 5th Sem ECE BE/B.TECH

Anna University 5th Semester Important Questions For ECE students are updated by rejinpaul.com Digital Communication EC2301 Helps Students From 3rd year ece, 4th year ECE students to perform well in May / June 2013 Anna Univ Examination

Digital Communication Anna Univ Important Questions 2013

University : Anna University

Subject : EC2301 Digital Communication

Departments : 5th Semester ECE

Regulation : 2008

Question Paper : May/June 2013 Important Question Paper

Semester : ECE 5th Semester Questions

DOWNLOAD A COPY FOR DC QUESTIONS HERE

MICROPROCESSORS AND MICROCONTROLLERS EC2304 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2011

Microprocessors and Microcontrollers EC2304  

ANNA UNIVERSITY EXAMINATIONS

NOV/DEC 2011  Question Paper

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EC2304 MICROPROCESSOR AND MICRO CONTROLLERS ANNA UNIVERSITY NOV/DEC 2010 QUESTION PAPER

B.E/B.Tech. DEGREE EXAMINATION, Nov/Dec 2010

FIFTH SEMESTER

ELECTRONICS AND COMMUNICATION ENGINEERING

EC2304- MICROPROCESSOR AND MICRO CONTROLLERS

(Regulation 2008)

PART-A(10*2=20marks)

1.What are tri-state devices?
2.Mention the advantages of using the Direct Memory Access.
3.What is the purpose of the following commands in 8086?(a)AAD,(b)RCL
4.Write an 8086 assembly language program to multiply two 16 bit unsigned numbers to provide a 32 bit result.Assume that the two numbers are stored in CX and DX.
5.Give the salient features of the 8254 Programmable interval timer.
6.What is a Sample and Hold circuit?
7.What are the advantages of the register indirect addressing mode in 8051 microcontroller?
8.Write an 8051 program to monitor PI continuously for the value 63H.It should get out of the monitoring only if P1=63H.
9.How is the microcontroller used for the traffic light control application?
10.Differentiate microprocessor from microcontroller in system design.

PART B (5 16 = 80 Marks)

11(a)(i)Explain the 8085 bus structure with a neat sketch.
(ii)What are the peripheral I/O instructions?Write its syntax and explain the same with the timing diagram.

or

(b)Explain the 8086 interrupts types in detail.

12(a)Explain the 8086 bit manipulation instructions with an example for each.

or

(b)Write an 8086 program to convert BCD data to binary data.

13(a)Explain the 8279 keyboard and sisplay controller with a neat sketch.

or

(b)Describe the architecture and working of 8253 timer.

14(a)Assume that 5 BCD data items are stored in RAM locations starting at 40H as shown below.Write an 8051 program to find the sum of all the numbers.The result must be in BCD.
40=(71),41=(11),42=(65),43=(59),44(37)

or

(b)Explain the working of the 8051 microcontroller.Give a neat sketch.

15(a)Explain how microcontrollers and microprocessors can be used for the washing machine control application.Use sketches.

or

(b)Explain with a neat sketch how microcontrollers and microprocessors can be used for the stepper motor control application.

DIGITAL SIGNAL PROCESSING EC2302 APRIL/MAY 2011 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, April/May 2011

Fifth Semester

Electronics and Communication Engineering

EC 2302 DIGITAL SIGNAL PROCESSING

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A (10 2 = 20 Marks)

1.State the advantages of FFT over DFTs.
2.What is mean by bit reversal?
3.Why do we go for analog approximation to deisgn a digital filter?
4.Give any two properties of chebyshev filters.
5.State the properties of FIR filters.
6.What is mean by Gibbs phenomenon?
7.What is mean by fixed point arithmetic?Give example.
8.Explain the meaning of limit cycle oscillator.
9.State the various applications of DSP.
10.What is echo cancellation?

PART B (5 16 = 80 Marks)

11(a)With appropriate diagrams describe (i)overlap-save method,(ii)overlap-add method.

or

(b)Explain Radix-2 DIF-FFT algorithm.Compare it with DIT-FFT algorithms.
12(a)Explain in detail Butterworth filter approximation.

or

(b)Expalin the bilinear transform method of IR filter design.What is warping effect?Explain the poles and zeros mapping procedure clearly.
13(a)Realize the system function H(z)=(2/3)z+1+(2/3)z(to the power -1) by linear phase FIR structure.

or

(b)Explain the designing of FIR filters using windows.
14(a)Explain the quantization process and errors introduced due to quantisation.

or

(b)(i)Explain how reduction of product round-off error is achieved in digital filters.
(ii)Explain the effects of coefficient quantisation in FIR filters.
15(a)(i)Explain how various sound effects can be generated with the help of DSP.
(ii)State the applications of multirate signal processing.

or

(b)(i)Expalin how DSP can be used for speech processing.
(ii)Explain in detail about decimation and interpolation.

ANNA UNIVERSITY NOV/DEC 2011 EC2301 DIGITAL COMMUNICATION QUESTION PAPER DOWNLOAD

EC2301 DIGITAL COMMUNICATION APRIL/MAY 2011 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, April/May 2011

Fifth Semester

Electronics and Communication Engineering

EC 2301 DIGITAL COMMUNICATION

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A (10*2 = 20 Marks)

1.Give an example each for time limited and time unlimited signals.
2.Give an advantage and a disadvantage of digital communication.
3.State sampling theorem.
4.What is quantization error?
5.Define hamming distance.
6.What is mean by transparency with respect to line codes?
7.What is a matched filter?
8.Give two applications for eye pattern.
9.Draw the PSK waveform for 011011.
10.What is a non-coherent detection system?

PART B (5*16 = 80 Marks)

11(a)Explain how PWM and PPM signals are generated.

or

11(b)(i)Classify channels.Explain the mathematical model of any two communication channels.(6)
(ii)Explain Binary symmetric channel and Gaussian channel with
their mathematical models. (Marks 10)

12(a)(i)Explain a non-uniform quantization process.
(ii)Write notes on temporal waveform coding.

or

12(b)(i)Explain a spectral waveform encoding porcess.
(ii)Compare various speeches encoding methods.

(13)(a)(i)Assume a (2,1) convolutional coder with constraint length 6.Draw the tree diagram,state diagram and trellis diagram for the assumed coder.
(ii)Find the (7,4) linear systematic block code word corresponding to 1101.Assume a suitable generator matrix.

or

13(b)Draw the power spectra of polar codes and on-off codes.Discuss their characteristics.

14(a)Derive the expression for bit error probability due to a matched filter.

or

(b)Disucss on signal design for ISI elimination.

15(a)Derive the bit error probability due to coherent ASK,PSK and FSK systems.Compare the performance of these systems.

or

15(b)(i)Disucss QPSK signalling
(b)(ii)Derive the bit error probability due to QPSK receiver.Compare the performance of QPSK receiver with that of PSK receiver.

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HIGH SPEED NETWORKS MODEL QUESTION PAPER ANNA UNIVERSITY

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Seventh Semester

Electronics and Communication Engineering

CS2060 � HIGH SPEED NETWORKS

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A � (10 � 2 = 20 marks)

1. List and explain the types of frame relay messages.

2. Give some examples of ATM applications.

3. State the key characteristics to be considered for deriving the analytic

equations for the queuing model.

4. What are meant by choke packets?

5. What is meant by a credit allocation scheme?

6. List and explain the mechanism available for supporting rate guarantees

in an ATM GFR service.

7. List some requirements for inelastic traffic.

8. State and explain the types of PHBs for differentiated services.

9. List the various reservation attributes and styles of the RSV Protocol in

detail.

10. What is meant be traffic engineering?

PART B � (5 � 16 = 80 marks)

11. (a) (i) With a neat sketch explain the various fields of an ATM cell. (10)

(ii) Discuss the various non real time ATM services. (6)

Or

(b) (i) Explain the fiber channel protocol architecture in detail. (8)

(ii) Give the requirements of wireless LAN in detail. (8)

12. (a) (i) Describe the single server queuing model with its structures

and parameters. (10)

(ii) Explain the Kendall�s notation and the common distributions

for the queuing model. (6)

Or

(b) (i) Explain in detail the explicit and implicit congestion signaling.(8)

(ii) List and explain the frame relay congestion control techniques.(8)

13. (a) (i) Describe the TCP implementation policy details. (8)

(ii) List and explain the categories of switch algorithms used for ATM congestion control and fair capacity allocation. (8)

Or

(b) Discuss in detail the ways in which TCP deals with the calculation of retransmission timers. (16)

14. (a) (i) Explain the Integrated services architecture and the QoS support functions. (8)

(ii) List and explain the various categories of Integrated services Architecture. (8)

Or

(b) Explain the Random Early Detection. (16)

15. (a) Explain the design goals and characteristics of the Resource reservation protocol in detail. (16)

Or

(b) Explain the RTProtocol architecture and draw its header format. (16)

COMPUTER ARCHITECTURE AND ORGANIZATION EC2303 ANNA UNIVERSITY PREVIOUS YEAR/MODEL QUESTION PAPER ECE DEPARTMENT

B.E./B.Tech DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Fifth Semester

Electronics and Communication Engineering

EC 2303 � COMPUTER ARCHITECTURE AND ORGANIZATION

(Common to Sixth Semester Biomedical Engineering)

(Regulation 2008)

(Common to PTEC 2303 � Computer Architecture and Organization for B.E.

(Part-time) Electronics and Communication Engineering

Fourth Semester Regulation � 2009)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A � (10 � 2 = 20 marks)

1. Define priority encoder.

2. What are the factors to be considered in selecting a number representation

to be used in a computer?

3. Write down the equation for carry generate and propagate.

4. Define coprocessor.

5. Compare the two methods to design the hardwired controller.

6. What is the use of micro assembler?

7. What is DRO and NDRO?

8. What is temporal locality?

9. What are the limitations of programmed IO?

10. Write down the CPU steps to determine the status of IO device.

PART B � (5 � 16 = 80 marks)

11. (a) (i) Draw the block diagram of a 4 bit register level magnitude comparator and explain. (8)

(ii) Briefly explain the organization of IAS computer with its instruction set. (8)

Or

(b) (i) How does one detect and correct errors during data transmission ? (8)

(ii) Describe in detail the different kinds of addressing mode with an example. (8)

12. (a) Explain 2�s complement multiplier with a neat block diagram. (16)

Or

(b) Explain floating point adder pipeline with neat block diagram. (16)

13. (a) (i) Write short notes on Nano programming. (8)

(ii) Describe the characteristics of supper scalar processing. (8)

Or

(b) Design a micro programmed control unit of non-pipelined general purpose computers (16)

14. (a) Describe in detail magnetic tape memories and disk memories. (16)

Or

(b) Describe cache memory in detail. (16)

15. (a) (i) What is DMA? Draw the block diagram and explain it in detail.(8)

(ii) Describe vectored interrupt scheme with a neat block diagram.(8)

Or

(b) (i) Define fault tolerance. How is it related to redundancy? Explain different approaches for designing fault tolerance systems. (8)

(ii) Explain different types of bus arbitration scheme. (8)

PRINCIPLES OF MANAGEMENT MG2351 ANNA UNIVERSITY NOVEMBER/DECEMBER 2011 QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Seventh Semester

Electrical and Electronics Engineering

MG 2351 � PRINCIPLES OF MANAGEMENT

(Common to Seventh Semester � Polymer Technology, Textile Technology,

Textile Technology (Fashion Technology) and common to Sixth Semester

Aeronautical Engineering, Automobile Engineering, Civil Engineering,

Electronics and Communication Engineering and Mechanical Engineering)

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A � (10 � 2 = 20 marks)

1. What are the various functions of management?

2. What is scientific management?

3. What is the main purpose of planning?

4. Define the term strategic planning.

5. What is division of labour?

6. Define the term functional authority.

7. What is non-verbal communication?

8. Define Job enlargement.

9. List the basic types of control.

10. What are the three potential pitfalls of budgets?

PART B � (5 � 16 = 80 marks)

11. (a) Explain in detail Henry Fayol�s contribution towards classical approach towards management.

Or

(b) (i) Describe the relative importance of each type of the skills to lower, middle and upper level managers. (8)

(ii) Explain the system based approach towards the management.(8)

12. (a) (i) Discuss the types and steps involved in decision making process. (8)

(ii) Explain Business portfolio matrix. (8)

Or

(b) (i) Describe in detail the various types of organizational plans. (8)

(ii) What are the different types decision and decision-making processes? (8)

13. (a) What do you understand by organizational chart? Explain the basis of the departmentalization.

Or

(b) Discuss the steps involved in providing appropriate human resources.

14. (a) (i) Explain the types of formal organizational communications. (8)

(ii) Discuss the barriers of effective interpersonal communications.(8)

Or

(b) Does motivation important for organization development/achievement? Justify your answer with Maslow�s hierarchy of needs.

15. (a) Explain the term operations management and major activities associated with operations management.

Or

(b) Discuss briefly the tools for organizational control.

WIRELESS COMMUNICATION EC2401 ANNA UNIVERSITY PREVIOUS YEAR MODEL QUESTION PAPER FOE ECE

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Seventh Semester

Electronics and Communication Engineering

EC 2401 � WIRELESS COMMUNICATION

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A � (10 � 2 = 20 marks)

1. Differentiate Cellular telephony and Cordless telephony.

2. When does a WLAN become a personal Area Network (PAN)?

3. Compute the Rayleigh distance of a square Antenna with 20 dB gain.

4. List out any two properties of wideband channel.

5. Draw the mathematical link model for analysis of modulation schemes.

6. What is OQPSK?

7. Mention any four common methods of micro diversity.

8. Define Hamming distance and Euclidean distance between two codes.

9. Discuss the principle of OFDM modulation scheme.

10. Give three important functional blocks of GSM system.

PART B � (5 � 16 = 80 marks)

11. (a) (i) Compare and contrast wired and wireless communication. (8)

(ii) Discuss briefly about the requirements of services for a wireless system. (8)

Or

 (b) (i) Discuss in detail the constructive and destructive interference.(8)

(ii) Explain how Inter Symbol Interference is caused and how it is eliminated. (8)

12. (a) (i) Describe any two methods of diffraction by multiple screens. (8)

(ii) Discuss about ultra wide band channel. (8)

Or

(b) (i) Compare Coherence Bandwidth and Coherence time (8)

(ii) Discuss the mathematical formulation for narrowband and wideband system, with relevant figures. (8)

13. (a) Compute the ratio of signal power to adjacent channel interference

When using (i) raised cosine pulses (ii) root raised cosine pulses with a = 0.5, when two considered signals have center frequencies 0 and 1.25/ T. (16)

Or

(b) (i) Discuss in detail any two demodulation techniques of minimum shift keying method. (8)

(ii) Explain in detail about optimum receiver structure for Non-coherent detection. (8)

14. (a) Explain the Viterbi decoding scheme if the decoder input sequence is �010 000 100 001 011 110 001�. (16)

Or

(b) (i) With a neat block diagram discuss the structure of a decision feedback equalizer. (8)

(ii) Discuss linear predictive vocoder with block diagram. (8)

15. (a) (i) Explain the principle of direct sequence spread spectrum technique.

(8)

(ii) Discuss some methods to increase the capacity of wireless communication system. (8)

Or

(b) (i) Explain in detail about the GSM logical channels. (8)

(ii) Explain the block diagram of IS-95 transmitter. (8)

ELECTRICAL ENGINEERING EC2201 NOV/DEC 2010 QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010

Third Semester
Electronics and Communication Engineering
EC 2201 � ELECTRICAL ENGINEERING
(Regulation 2008)
Time : Three hours Maximum : 100 Marks
Answer ALL questions
PART A � (10 � 2 = 20 Marks)

1. What is a dc compound generator?
2. What is the need for starter in dc motor?
3. Why is the core of transformer laminated?
4. Define voltage regulation of a transformer.
5. What are the types of 3-ph induction motors?
6. Name the starting methods for cage motors.
7. Why should an alternator run always at synchronous speed?
8. Write down the emf equation of alternator.
9. What are the various stages of an electric power system?
10. Mention the disadvantages of HVDC transmission.

PART B � (5 � 16 = 80 Marks)

11. (a) (i) Briefly explain the construction of a DC machine with neat diagram. (Marks 10)
(ii) A dc shunt generator has a terminal voltage of 160 V and a no-load induced emf of 168 V. The resistances of armature and field are 0.03 and 20 . Find the armature current, field current and load current. Neglect armature reaction. (Marks 6)

Or

(b) (i) Explain the characteristics of series, shunt and compound motors.(9)
(ii) Explain the Ward Leonard method of speed control of dc shunt motor. (Marks 7)

12. (a) (i) Derive the emf equation of a transformer. (Marks 10)
(ii) A single phase transformer is rated at 240/120 V, 50 Hz, Find voltage and frequency of secondary at no-load (1) if primary voltage is 120 V, 25 Hz and (2) if primary voltage is 240 V dc. (Marks 6)

Or

(b) (i) Deduce the equivalent circuit of 1-ph transformer. (Marks 6)

     (ii) A 1-ph transformer is rated at 10 KVA, 50 Hz. The secondary rated voltage is 240 V and the turns ratio is 10. The resistance and leakage reactant as referred to primary are 8.4 and 13.7 respectively. Find voltage regulation at full-load and power factors of 0.8 lagging, 0.8 leading and unity. (Marks 10)

13. (a) (i) Explain the principle of operation of 3-ph induction motor and (Marks 5)
(ii) A 3-ph, 6 pole 50 Hz cage motor is running with a slip of 4%. Find speed of the rotating field relative to the stator winding, motor speed and frequency of emf induced in the rotor. (Marks 6)
(iii) Briefly explain the starting of squirrel cage motor using star-delta starter. (Marks 5)

Or

(b) Discuss the operation of following types of 1-ph induction motors with neat circuit diagrams and speed-torque characteristics.
(i) Capacitor-start, capacitor-run motor (Marks 8)
(ii) Shaded pole motor. (Marks 8)


14. (a) Briefly discuss the construction of the following :
(i) Stator of synchronous machine (Marks 8)
(ii) Salient pole and cylindrical rotors. (Marks 8)

Or

(b) Explain the construction and operation of the following :
(i) Reluctance motor (Marks 8)
(ii) Hysteresis motor. (Marks 8)


15. (a) (i) Draw the one-line diagram of a typical power supply system. Mark all the components. (Marks 10)
(ii) What are the advantages of dc transmission systems over ac transmission systems? Explain. (Marks 6)

Or

(b) (i) What are the main components used in transmission and distribution systems? Write down the functions of each. (Marks 8)
(ii) Compare overhead lines and underground cable systems. (Marks 8)