Interference and System Capacity – Multiple Choice Questions and Answers (MCQs)

Wireless & Mobile Communications

Set of MCQs (Multiple Choice Questions & Answers) with Answers on Interference and System Capacity of Wireless & Mobile Communications in ECE (Electronics & Communication Eng.).

1. Which of the following is not a source of interference?
a) Base station in a different cluster
b) Another mobile in same cell
c) A call in progress in neighbouring cell
d) Any BS operating on same frequency

2. Interference on voice channels causes _______
a) Blocked calls
b) Cross talk
c) Queuing
d) Missed calls

3. Interference in control channel leads to ________
a) Cross talk
b) Queuing
c) Blocked calls
d) Voice traffic

4. Interference is more severe in rural areas.
a) True
b) False

5. What are co-channel cells?
a) Cells having different base stations
b) Cells using different frequency
c) Cells using adjacent frequency
d) Cells using same frequency

6. Co-channel interference is a function of _________
a) Radius of cell
b) Transmitted power
c) Received power
d) Frequency of mobile user

7. Co-channel reuse ratio is define by _________
a) Q=D*R
b) Q=D/R
c) Q=D^R
d) Q=1/R

8. Co-channel ratio in terms of cluster size is defined as _________
a) (3N)−−−−√
b) N
c) 3N
d) √N

9. What is the cluster size for CDMA?
a) N=10
b) N=100
c) N=1
d) N=50

10. What is breathing cell effect?
a) Fixed coverage region
b) Dynamic and time varying coverage region
c) Large coverage region
d) Very small coverage region

11. Adjacent channel interference occurs due to _______
a) Power transmitted by Base station
b) MSCs
c) Same frequency of mobile users
d) Imperfect receiver filters
.

12. Which of the following problem occur due to adjacent channel interference?
a) Blocked calls
b) Cross talk
c) Near-far effect
d) Missed calls

13. In near-far effect, a nearby transmitter captures the __________
a) Receiver of the subscriber
b) Transmitter of the subscriber
c) Nearby MSC
d) Neighbouring base station

14. Adjacent channel interference can be minimized through _______
a) Changing frequency of base stations
b) Careful filtering and channel assignments
c) Increasing number of base stations
d) Increasing number of control channels

15. In dynamic channel assignment, any channel which is being used in one cell can be reassigned simultaneously to another cell in the system at a reasonable distance.
a) True
b) False

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