B.E./B.Tech Degree Examination,April/May 2010
Fourth/Third Semester
EC1207 Principles of Communication Engineering(common to cse,it,eee,eie and ice)
part-a (10 * 2 = 20 marks)
answer all the questions
1.define amplitude modulation.
2.state the disadvantages of TRF receiver
3.define modulation index in FM system
4.what is the need for limiter in FM receiver
5.Distinguish between Binary and M-ary Signalling Scheme.
6.What do you mean by Duobinary encoding?
7.State sampling theorem for law pass signals.
8.define Inter Symbol Interference.
9.define TDMA
10.Mention any two applicatons of Spread Spectrum Modulation.
part-b (5 * 16 = 80 marks)
11.explain in detail the method of producing amplitude modulated signal and derive the frequency spectrum of an AM signal [16 marks]
Or
12.Draw the block diagram of Superheterodyne receiver and explain the function of each block in detail.[16 marks]
13.Derive the expression for frequency modulated wave and hence explain the generation of FM wave.
or
14.(a)Discuss on transmission bandwidth of FM.[6 marks]
(b) Draw the block diagram of FM receiver and explain its operation.[10 marks]
15.With necessary equations and signal space diagram,explain in detail about Binary FSK system.[16 marks]
or
16.Draw the signal space diagram of QPSK signal. Explain the QPSK modulation process and its performance.[16 marks]
17 (a)State and prove Sampling theorem [8 marks]
(b)Discuss on Quadruture sampling of band pass signals [8 marks]
or
18.Explain in detail the principle of baseband binary transmission system and derive the Nyquist criterion for distortion less transmission [16 marks]
19. Explain the direct sequence spread spectrum modulation with coherent binary PSK and discuss on processing gain. [16 marks]
or
20.Describe the different types of multiple access techniques with neat sketches (16 marks).
KEYWORDS:2010 ANNA UNIVERSITY CHENNAI B.E EC1207 PRINCIPLES OF COMMUNICATION ENGINEERING, APRIL/MAY 2010 QUESTION PAPER,ANNA UNIVERSITY QUESTION PAPER,ANNA UNIVERSITY,ANNA UNIVERSITY CHENNAI,ANNA UNIVERSITY COIMBATORE,ANNA UNIVERSITY TRICHY,ANNA UNIVERSITY TIRUNELVELI,ANNA UNIVERSITY MADURAI,ANNA UNIVERSITY SYLLABUS,ANNA-UNIVERSITY RESULTS,ANNA UNIVERSITY DISTANCE EDUCATION,ANNA UNIVERSITY MBA-CENTRE FOR DISTANCE EDUCATION,ANNA UNIVERSITY SCHEDULE OF EXAMINATIONS,ANNA UNIVERSITY ADMISSION,ANNA UNIVERSITY COURSES,ANNA UNIVERSITY ACADEMIC,ANNA UNIVERSITY DEPARTMENTS,ANNA UNIVERSITY RESEARCH,ANNA UNIVERSITY MAIL,ANNA UNIVERSITY QUESTION PAPERS,ANNA UNIVERSITY COUNSELLING DATES,ANNA UNIVERSITY RE-EVALUATION RESULTS
Fourth/Third Semester
EC1207 Principles of Communication Engineering(common to cse,it,eee,eie and ice)
part-a (10 * 2 = 20 marks)
answer all the questions
1.define amplitude modulation.
2.state the disadvantages of TRF receiver
3.define modulation index in FM system
4.what is the need for limiter in FM receiver
5.Distinguish between Binary and M-ary Signalling Scheme.
6.What do you mean by Duobinary encoding?
7.State sampling theorem for law pass signals.
8.define Inter Symbol Interference.
9.define TDMA
10.Mention any two applicatons of Spread Spectrum Modulation.
part-b (5 * 16 = 80 marks)
11.explain in detail the method of producing amplitude modulated signal and derive the frequency spectrum of an AM signal [16 marks]
Or
12.Draw the block diagram of Superheterodyne receiver and explain the function of each block in detail.[16 marks]
13.Derive the expression for frequency modulated wave and hence explain the generation of FM wave.
or
14.(a)Discuss on transmission bandwidth of FM.[6 marks]
(b) Draw the block diagram of FM receiver and explain its operation.[10 marks]
15.With necessary equations and signal space diagram,explain in detail about Binary FSK system.[16 marks]
or
16.Draw the signal space diagram of QPSK signal. Explain the QPSK modulation process and its performance.[16 marks]
17 (a)State and prove Sampling theorem [8 marks]
(b)Discuss on Quadruture sampling of band pass signals [8 marks]
or
18.Explain in detail the principle of baseband binary transmission system and derive the Nyquist criterion for distortion less transmission [16 marks]
19. Explain the direct sequence spread spectrum modulation with coherent binary PSK and discuss on processing gain. [16 marks]
or
20.Describe the different types of multiple access techniques with neat sketches (16 marks).
KEYWORDS:2010 ANNA UNIVERSITY CHENNAI B.E EC1207 PRINCIPLES OF COMMUNICATION ENGINEERING, APRIL/MAY 2010 QUESTION PAPER,ANNA UNIVERSITY QUESTION PAPER,ANNA UNIVERSITY,ANNA UNIVERSITY CHENNAI,ANNA UNIVERSITY COIMBATORE,ANNA UNIVERSITY TRICHY,ANNA UNIVERSITY TIRUNELVELI,ANNA UNIVERSITY MADURAI,ANNA UNIVERSITY SYLLABUS,ANNA-UNIVERSITY RESULTS,ANNA UNIVERSITY DISTANCE EDUCATION,ANNA UNIVERSITY MBA-CENTRE FOR DISTANCE EDUCATION,ANNA UNIVERSITY SCHEDULE OF EXAMINATIONS,ANNA UNIVERSITY ADMISSION,ANNA UNIVERSITY COURSES,ANNA UNIVERSITY ACADEMIC,ANNA UNIVERSITY DEPARTMENTS,ANNA UNIVERSITY RESEARCH,ANNA UNIVERSITY MAIL,ANNA UNIVERSITY QUESTION PAPERS,ANNA UNIVERSITY COUNSELLING DATES,ANNA UNIVERSITY RE-EVALUATION RESULTS