20EC2E17 CMC QUIZ 1 RETEST

What is the reason for keeping the size of the cell small in a cellular network?

• Reduce energy consumption

• Increase data transfer speed

• Efficient frequency reuse

• Improve screen resolution

Identify the shape of the cell which is universally adopted.

• Hexagon

• Square

• Circle

• Triangle

Recognize which of the following is not a result of multipath propagation in a radio channel.

• Rapid changes in signal strength

• Random frequency modulation

• Power of base station

• Time dispersion

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

• Cross talk

• Missed calls

• Blocked calls

• Near-far effect

Name the resource that is allocated to each cell in the fixed channel assignment strategy.

• Voice channels

• Control channels

• Frequency

• Base stations

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

• 150 channels

• 600 channels

• 500 channels

• 85 channels

For a cellular system, if there are N cells and each cell is allocated k channel. What is the total number of available radio channels, S?

• S=k*N

• S=k/N

• S=N/k

• S=kN

Tell the Co-channel reuse ratio expression.

• Q = D/R

• Q = D*R

• Q = R/D

• Q = R2 D

Relate gain and effective aperture.

• G=(4π λ2/Ae

• G=4πAe

• G=Ae/��2

• G=(4πAe)/λ2

Select the minimum data speed offered by 3G mobile technology for a Stationary user.

• 128 Kbps

• 2 Mbps

• 8 Mbps

• 144 Mbps