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Assignment No 3 Data communication (CS601) Solution and Discussion Spring 2014 Due Date: July 14, 2014

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Assignment

Question 1: (5 Marks)
When a signal travels from source to destination, it may b affected by different external factors that cause the loss of energy, due to which the signal may differs from its actual shape. In the given table you are required to identify the type of noise with respect to noise source.

Noise Source                                                             Noise Type

Telephone Wire
Water Pump
Earthquake
Extra Signal generated by Motion of Electron
Grinder

Question 2: (5 Marks)
Suppose a signal is generated from a source with initial power of 1000W but due to attenuation it is received at destination (80 Km away from source) with power of 100W. Find the total power loss in decibels by writing formula with all calculation steps.

Question 3: (5 Marks)
Suppose you need to have simultaneous transmission of signals through a single medium, then which technique will be used to fulfill this requirement? Also describe, how does that technique work at sender and receiver end?

NOTE: Do not put any query on MDB about this assignment, if you have any query then email at cs601@vu.edu.pk.

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ye kia?

ye to sirf atenuation ha

power loss kese nikalna ha

Q# 2 main p2 or p1 watt main han ...........kya in dono ko db main convert kerna hai?

Noise Source Noise Type
Telephone Wire Crosstalk
Water Pump Industrial Noise
Earthquake Seismic Noise
Extra Signal generated by Motion of Electron Thermal Noise
Grinder Industrial Noise

thanx

3rd question solution plz

frnds muja ya samj nai aa rha k first part ma ap logo na industrial noise or dusri type of noise ke bat ki ha aus ka book ma koi zikar nai ha........ to pher ya kha sa aa gai....

Multiplexing
Multiplexing is a set of techniques that allows the simultaneous transmission of multiple signals across a single data link”

When we are using multiplexing technique we need to have MUX at the sender side, which combine multiple TX streams into single stream and DEMUX at the receiver side, which separates stream back into its component transmissions and directs them into their intended devices.

make me currect if i wrong

question # 2 main p2 or p1 watt main han..... kya inko dbs main convert kerna hai???????????????????????????

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