Fundamentals of Communication Engg - Dec 2013
Electronics Engineering (Semester 4)
TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Compare TDM and FDM.(5 marks) 1 (b) State and explain sampling theorem.(5 marks) 1 (c) Explain companding.(5 marks) 1 (d) What is the need of modulation?(5 marks) 2 (a) Explain ISB technique of transmission.(10 marks) 2 (b) What is the need of SSB generation, explain phase shifting methos of SSB generation.(10 marks) 3 (a) Explain indirect FM generation method.(10 marks) 3 (b) Explain sources of noise.(10 marks) 4 (a) Explain superheterodyne radio reciever, what are the advantages over TRF.(10 marks) 4 (b) Explain balaced modulator.(10 marks) 5 (a) Explain adaptive delta modulation.(10 marks) 5 (b) Explain pulse code modulation system.(10 marks) 6 (a) The bit sequence 11010010 is to be transmitted using following formats:
(ii) Bipolar NRZ
(iv) Polar RZ
(v) Polar NRZ
Draw all the waveforms.(10 marks) 6 (b) Explain generation and detection of PPM, PWM.(10 marks)
Write short notes on:-
7 (a) Quantization process.(5 marks) 7 (b) Practical diode detector.(5 marks) 7 (c) Image frequency.(5 marks) 7 (d) Fidelity and double spotting of radio reciever.(5 marks)