Mobile Communication Advanced Questions: MCQs Set

Mobile Communication Advanced Questions. This set has 18 Multiple Choice Questions related to Mobile Communication in Electronics Engineering.

 

Mobile Communication Advanced Questions

 

 

The advantages of FDMA over TDMA include ??

1. Division is simpler
2. Propagation delays are eliminated
3. Cheaper filters with less complicated logic functions
4. Linearity

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 4 are correct
d. All four are correct

 

Disadvantages of packet radio are ??

a. Induced delays
b. Low spectral efficiency
c. Large spectrum required
d. Both a and b
e. Both b and c

 

TDMA is a multiple-access technique that has ??

a. Different users in different time slots
b. Each user is assigned unique frequency slots
c. Each user is assigned a unique code sequence
d. Each signal is modulated with a frequency modulation technique

 

Packet radio refers to ??

a. Multiple users on single-channel
b. Single user on multiple channels as per demand
c. Multiple users on multiple channels at different time slots
d. Multiple users with coding techniques

 

Electronics MCQs

 

In TDMA, the user occupies the whole bandwidth during transmission ??

a. True
b. False

 

The guard interval is provided in OFDM ??

a. To eliminate the need for pulse shaping filter
b. To eliminate ISI
c. High symbol rate
d. Both a and b
e. Both b and c

 

TDMA allows the user to have ??

a. Use of same frequency channel for same time slot
b. Use of same frequency channel for different time slot
c. Use of same time slot for different frequency channel
d. Use of different time slot for different frequency channels

 

The troubles that OFDM faces over other spread spectrum techniques are ??

1. Sensitivity to Doppler shift
2. Frequency synchronization problems
3. Time synchronization problems
4. Low efficiency due to guard intervals

a. 1, 2, and 3 are correct
b. 2 and 3 are correct
c. 1, 2, and 4 are correct
d. All the four are correct

 

Mobile Communication Advanced Questions

 

GSM is an example of ??

a. TDMA cellular systems
b. FDMA cellular systems
c. CDMA cellular systems
d. SDMA cellular systems

 

Advantages of using OFDM include ??

1. Avoids complex equalizers
2. Low symbol rate and guard interval
3. Avoids ISI
4. Multiple users at the same frequency

a. 1, 2, and 3 are correct
b. 2 and 3 are correct
c. 1, 2, and 4 are correct
d. All four are correct

 

TDMA is employed with a TDMA frame that has a preamble. The preamble contains Address of the base station and subscribers ??

1. Synchronization information
2. Frequency allotted
3. Coded sequence

a. 1 and 2 are correct
b. 1, 2, and 3 are correct
c. 2 and 4 are correct
d. All four are correct

 

OFDM is a technique of ??

1. Encoding digital data
2. Multiple carrier frequencies
3. Wideband digital communication
4. 4G mobile communication

a. 1, 2, and 3 are correct
b. 2 and 3 are correct
c. 1, 2, and 4 are correct
d. All four are correct

 

Mobile Communication Advanced Questions

 

CDMA is ??

1. Spread spectrum technology
2. Using the same communication medium
3. Every user stays at a certain narrowband channel at a specific time period
4. Each user has a unique PN code

a. 1, 2, and 3 are correct
b. 2 and 3 are correct
c. 1, 2, and 4 are correct
d. All four are correct

 

FHMA is ??

1. Spread spectrum technology
2. Using the same communication medium
3. Every user has assigned a unique frequency slot
4. Each user has a unique PN code

a. 1 and 2 are correct
b. 1, 2, and 4 are correct
c. 2 and 4 are correct
d. All four are correct

 

Global Positioning System uses ??

a. CDMA
b. TDMA
c. SDMA
d. FDMA

 

Mobile Communication Advanced Questions

 

The advantages of using a CDMA technique over other spread spectrum techniques are ??

1. Increased capacity
2. Easier handoff
3. Better measure of security
4. Multiple users occupy different spectrum at a time

a. 1, 2, and 3 are correct
b. 2, 3, and 4 are correct
c. 1, 2, and 4 are correct
d. All the four are correct

 

CDMA is advantageous over other Spread Spectrum techniques for ??

1. The privacy due to unique codes 
2. It rejects narrowband interference
3. Resistance to multipath fading
4. Its ability to frequency reuse

a. 1, 2, and 3 are correct
b. 2 and 3 are correct
c. 1, 2, and 4 are correct
d. All four are correct

 

The wideband usage in CDMA helps in ??

1. Increased immunity to interference
2. Increased immunity to jamming
3. Multiple user access
4. Different spectrum allocation in different time slots

a. 1, 2, and 3 are correct
b. 2, 3, and 4 are correct
c. 1, 2, and 4 are correct
d. All the four are correct

 

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