Cochin University of Science and Techology (CUST) 2006 B.Tech Computer Science and Engineering I VSemester , CS/IT 405 Communication Engineering - Question Paper
- IV-(S)-06-Olt (A)
Tech Degree IVSemester (Supplementary) Examination May 2006
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IT/CS 405 COMMUNICATION ENGINEERING
(1998 Admissions)
: 3 Hours Maximum Marks : 100
(a) Explain the need for modulation. (5)
(b) Define AM, derive the equation for AM wave, draw the wave and spectrum. (8)
(c) Draw the circuit diagram of a AM modulator. (7)
OR
(a) Compare AM and FM. (5)
(b) Explain the block diagram of FM modulator. (7)
(c) Explain phase shifter method for the generation of SSB. (8)
(a) C.tptam High level and low level modulator, give one example each. (12)
(b) Di aw the block diagram of FM receiver. (8)
OR
(a) Explain the working of a SSB Transmitter, compare its performance with DSB
Tf nnsmission. (10)
(b) Explain the block diagram of (SB Transmitter. (10)
(a) Explain various types of FM waves also mention their applications. (12)
(b) Define - (i) radiation resistance (ii) directivity. (8)
OR
(a) W hat is meant by radiation pattern of an antenna, discuss various types? (10)
(b) (i i Differentiate between Half wave dipole and Quarter wave monopole.
(ii) Define beam width and impedance of an antenna. (10)
(a) Explain PAM with neat sketches. (8)
(b) Whai is meant by Shannons theorem. (5)
(c) Explain TDM. (7)
OR
(a) Explain the block diagram of PCM. (10)
(b) Write short notes on error correction and detection codes, (10)
(a) List the advantages and disadvantages of fiber optic communication. (8)
(b) Explain the general block diagram of satellite communication. Briefly explain each individual blocks. (12)
OR
(a) E: plain various types of fiber structures with neat sketch. (10)
(b) E 'plain various types of satellites used for communication. (10)
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