sns college of engineering, coimbatore … · unscramble the tiles to reveal a message....

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SNS COLLEGE OF ENGINEERING,

COIMBATORE

DEPARTMENT OF ECE

EC 6801 – WIRELESS

COMMUNICATION

STUDENTS WORKBOOK

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UNIT – 2

CELLULAR

ARCHITECTURE

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TOPIC – 1 MULTIPLE ACCESS TECHNIQUES

1. RECOGNIZE THE CHANNEL (Remember)

2. Fill the missing slots. (Understand)

3. Search the words related to CDMA

4. Compare CDMA, FDMA & TDMA (Analyze & Evaluate)

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Techniques

Parameters

TDMA FDMA CDMA

Channel usage

Narrowband system????

Synchronization bits???

Interference

Simplex / Duplex???

Power consumption

Noise

Modulation

Forward Error Correction

Bandwidth Efficiency

Source coding

Diversity

complexity

Handover

Fading

Voice and data integration

Evolution

5. What is Non Orthogonal Multiple Access (NOMA) for wireless communications?

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Write a report on NOMA and its potential use in 5G networks. (Apply & Evaluate)

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TOPIC – 2 CELLULAR CONCEPT, CHANNEL ASSIGNMENT AND HANDOFF

1. (Understand) Fill the frequency reuse channels with

any alphabets without interference

2. (Understand)

WHY?

3. Name the type of Problem______________________ (Analyze)

JUSTIFY

JUSTIFY

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4. (Analyze)

WHY?

5. (Understand)

Find the interference….

6. Unscramble the channel assignment methods (Understand)

JUSTIFY

JUSTIFY

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7. Unscramble the tiles to reveal a message. (Understand)

8. Fill the co-channel reuse ratio and N(cluster size)

CLUSTER SIZE (N) Co-CHANNEL REUSAE RATIO (Q)

i = 1, j = 1

i =1, j=2

i=2, j=2

i=1, j=3

9. Name the type of interference.

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10. See the picture and write a report on the study. (Analyze)

Hint: 1/3 frequency reuse network.

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11. From the picture given below, find the Cluster size, N and the integers i and j

Hint: Co-channel reuse ratio

12. Study on the data and write the pros and cons of fixed and dynamic channel assignment strategies. (Analyze and Evaluate)

Answer

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FIXED CHANNEL ASSIGNMENT DYNAMIC CHANNEL ASSIGNMENT PROS:

FIXED CHANNEL ASSIGNMENT DYNAMIC CHANNEL ASSIGNMENT CONS:

PROS:

DYNAMIC CHANNEL ASSIGNMENT CONS:

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TOPIC – 3 INTERFERENCE, TRUNKING & GOS, COVERAGE AND CAPACITY IMPROVEMENT

1. Find the terms related to trunking. (Remember)

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2. Match the following (Understand)

3. The co-channel interference can be reduced by the following methods. Explain the

same with justification. (Analyze and Apply)

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4.

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(Analyze and Apply)

STEPS FORMULA WORKING AREA

1.

2.

3.

4.

5.

6.

7.

Work sheet MEMORY TREE

Write the key points on each branch.

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