WBUT 2013 Communication Theory Question paper (Paper Code EI-704A)

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CS/B.TECH/EIE-New/SEM-7/EI-704A/2013-14

2013

COMMUNICATION THEORY

Time Allotted : 3 Hours                                              Full Marks : 70

The figures in the margin indicate full marks.

Candidates are required to give their answers in their own words

as far as practicable.

GROUP – A

(Multiple Choice Type Question)

1.       Choose the correct alternatives for any ten of the following:                                                                                            10 x 1 = 10

          i)       The positive RF peaks of an AM voltage rise to a maximum value of 12V and drop to a minimum value of 4V. The modulation index assuming single tone modulation is

                   a)      3                                    b)      13

                   c)      14                                     d)      12  .

          ii)      PCM generation requires a LPF at the beginning

                   a)      to eliminate aliasing effect

                   b)      to eliminate quantization noise

                   c)      to eliminate decoding noise

                   d)      to eliminate white noise.

 

 

 

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