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CMC Quiz

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

A spectrum of 30 MHz is allocated to a cellular system which uses two 25 KHz simplex channels to provide full duplex voice channels. What is the number of channels available per cell for 4 cell reuse factor?

a)

150 channels

b)

600 channels

c)

50 channels

d)

85 channels

2.

Which type of antenna is used for edge excited cells?

a)

Omnidirectional antenna

b)

Grid antenna

c)

Sectored directional antenna

d)

Dipole antenna

3.

Capacity of a cellular system is directly proportional to __________

a)

Number of cells

b)

Number of times a cluster is replicated

c)

Number of Base stations

d)

Number of users

4.

What happen to a call in fixed channel strategy, if all the channels in a cell are occupied?

a)

Queued

b)

Cross talk

c)

Blocked

d)

Delayed

5.

In fixed channel assignment strategy, each cell is allocated a predetermined set of _______

a)

Voice channels

b)

Control channels

c)


Frequency

d)


base stations

6.

In dynamic channel assignment strategy, base station requests channel from ____________

a)

Neighbouring cell

b)

MSC

c)

Neighbouring cluster

d)

Neighbouring base station

7.

Paging system uses which mode of transmission?

a)

Full duplex

b)

Simplex

c)

Half Duplex

d)

Duplex

8.

The time over which a call can be maintained within a cell without handoff is called _________

a)

Run time

b)

Peak time

c)

Dwell time

d)

Cell time

9.

Umbrella cell approach is possible by using _________

a)

Antenna of same heights

b)

Antenna of different heights

c)

Different voice channels

d)

Different control channels

10.

Which of the following problem occur due to adjacent channel interference?

a)

Blocked calls

b)

Cross talk

c)

Near-far effect

d)

Missed calls

11.

What is the unit for the measure of traffic intensity?

a)

Meters

b)

Henry

c)

Ohm

d)

Erlang

12.

Path loss in free space model is defined as difference of ________

a)

Effective transmitted power and gain

b)

Effective received power and distance between T-R

c)

Gain and received power

d)

Effective transmitter power and receiver power

13.

GOS is typically given as a likelihood that a ________

a)

Call is in progress

b)

Channels are busy

c)

Call is blocked

d)

Channels are free

14.

The angle at which no reflection occurs in the medium of origin is called _________

a)

Azimuth angle

b)

Elevation angle

c)

Brewster angle

d)

Inclination angle

15.

The phase difference between a direct line of sight path and diffracted path is function of _______

a)

Height and position of obstruction

b)

Only height

c)

Operating frequency

d)

Polarization

16.

The actual received signal is ______ than what is predicted by reflection and diffraction model.

a)

Weaker

b)

Equal

c)

Stronger

d)

Very weak

17.

Flat fading channel is also known as _______________

a)

Amplitude varying channel

b)

Wideband channel

c)

Phase varying channel

d)

Frequency varying channel

18.

For fast fading channel, the coherence time of the channel is smaller than _______ of transmitted signal.

a)

doppler spread

b)

bandwidth

c)

Symbol period

d)

Coherence bandwidth

19.

Space diversity s also known as ________

a)

Antenna diversity

b)

Time diversity

c)

Frequency diversity

d)

Polarization diversity

20.

In maximal ratio combining, the output SNR is equal to __________

a)

Mean of all individual SNRs

b)

Maximum of all SNRs

c)

Sum of individual SNRs

d)

Minimum of all SNRs