CS/B.TECH (CSE(IT)New)/SEM-4/CS-401/2012
2012
COMMUNICATION ENGINEERING AND CODING 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 the following: 10 x 1 = 10
i) Intermediate frequency of standard AM receiver system is
a) 500 kHz b) 555 kHz
c) 455 kHz d) 450 kHz
ii) An analog signal is quantized using L levels, the signal to quantization noise ratio varies
a) directly with L b) directly with L2
c) directly with L3 d) none of these.
iii) If a source produces five symbols with probabilities 1/2 , 1/4 , 1/8 , 1/16 and 1/16 , then the source entropy H(x) is
a) 3 b/symbols b) 5.5 b/symbols
c) 2.875 b/symbols d) 1.875 b/symbols.
