CS601 Data Communication Assignment No. 03 Solution 23rd January 2016

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Question: Marks 15
Question. 1 (5 Marks)
Consider an extremely noisy channel in which the value of the signal-to-noise ratio is 2000 and bandwidth is equal to 6000 Hz. Calculate channel capacity, according to Shannon Capacity formula. Provide your answer with full calculation, correct formula and correct units.

Formula
Calculation
Unit




Question. 2 (5 Marks)
Suppose a signal travels through a transmission medium with initial power 1000dB but due to some impairments it is received at the destination (about 100 Km away from the source) with power 10dB. You are required to calculate the total power loss, by following all steps in the formula with the correct unit.
Formula
Calculation
Unit



Question. 3 (5 Marks)
Assume a well reputable company that manufactures the electronic equipments, wants to establish a small and reliable network of 40 computers for communication with each other. According to you, which transmission medium between STP and UTP will be preferred and why? Justify your answer with solid reason.

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Q1
Formula
Calculation
Unit


C = B log2 (1 + S/N)


Bandwidth is 3 KHz

S/N ratio is 3162

C = B log2 (1 + S/N)

C = 6000 log2 (1 + 2000)

C = 65.799


bps
Q2
Formula
Calculation
Unit


dB = 10 log10 (P2/P1)


P1 is Intial Power

P2 is Final Power

dB = 10 log10 (P2/P1)

dB = 10 log10 (100/1000)

dB= -10