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CS601 Assignment No 03 Solution & Discussion Due Date: 10-02-2015

Assignment No. 3

Semester: Fall 2014

Data Communication - CS601

 

Total Marks: 10

 

Due Date: 10/02/2015

 

Objective:

 

To have the understanding of Transmission Impairments and Multiplexing.

 

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                                                                                                       Assignment

 

Question. 1

 

Six channels, each with a 75-kHz bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10 kHz between the channels to prevent interference? Give your answer in following table with correct values.

 

 

Calculations

Bandwidth with proper Unit

 

 

 

 

Question. 2

 

A signal travels through an amplifier and its power is increased 100 times. Calculate the amplification of the signal. Give your answer in following table with correct values and proper unit.

 

 

Calculation

Amplification with proper unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wish You All The Best

J

 

Views: 12421

Replies to This Discussion

Please Discuss here about this assignment.Thanks

Our main purpose here discussion not just Solution

We are here with you hands in hands to facilitate your learning and do not appreciate the idea of copying or replicating solutions.

Any body please tell me that these answer are right or wrong.......

Question. No. 1

Six channels, each with a 75-kHz bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10 kHz between the channels to prevent interference? Give your answer in following table with correct values.

 

Answer.

Calculations

Bandwidth with proper Unit

?

?

For Six channels, we need at least five guard bands (Channels must be separated by strips of unused BW (guard bands) to prevent signals from Overlapping). This means that the required bandwidth is at least given as:

 

Total Channels = 6

Total Frequency of one channel = 75 KHz

Guard Band frequency b/w channels = 10 KHz

Bandwidth = Freq. of one channel × Total Channels + Guard band freq. × Total guard bands

Bandwidth = 75 × 6 + 5 × 10

Bandwidth = 450 + 50

Bandwidth = 500 KHz           Ans.

 

Calculations

Bandwidth with proper Unit

Minimum Bandwidth

500 KHz

 

Question. No. 2

A signal travels through an amplifier and its power is increased 100 times. Calculate the amplification of the signal. Give your answer in following table with correct values and proper unit.

 

?

 

Calculation

Amplification with proper unit

?

? 

 

 

Answer.

A signal travels through an amplifier and its power is increased 100 times. This means that the amplification (gain of power) can be calculated as

10 log10 (P2/P1) = 10 log 10 (100P1/P1)

                              =10 log10 (100)  

                              = 10 (2)

                              = 20dB   Ans.

Calculation

Amplification with proper unit

Power Gain

20db

in the first question we use the shannon farmoula but this formoula i not understand plz give some understandable point to clear my concept...

Attachments:

Q.no.2

kindly explain how you solve?

What is guard band?

Data Communication - CS601 solution related example ap in ko samj k solution easily bna skty hain.

Attachments:

Yh kis chptr mn h ??

excellent work

Dear Zain,
Can you share from where did you get this information about guard bands?

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