Wireless Communication MCQs | Wireless Communication Multiple Choice Questions and Answers

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Questions
1 The modulation technique used for mobile communication systems during world war II was
A Amplitude modulation
B Frequency modulation
C ASK
D All of these

Answer: Frequency modulation
2 The early FM push-to-talk telephone systems were used in
A Simplex mode
B Half duplex mode
C Full duplex mode
D None of the above

Answer: Half duplex mode
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3 Paging systems could be used to
A Send numeric messages
B Send alphanumeric messages
C Voice message
D All of the above

Answer: All of the above
4 Half duplex system for communication has
A Communication in single direction
B Communication in both directions at the same time
C Communication in single direction at a time
D All of the above

Answer: Communication in single direction at a time
5 The process of transferring a mobile station from one base station to another is
A MSC
B Roamer
C Hand off
D All of these

Answer: Hand off
6 IMT-2000 is a digital mobile system that functions as
A Pager
B Cordless
C Low earth orbit satellites
D All of the above

Answer: All of the above
7 IMT-2000 is a digital mobile system that functions as
A Pager
B Cordless
C Low earth orbit satellites
D All of the above

Answer: All of the above
8 The 2G cellular network uses
A TDMA/FDD
B CDMA/FDD
C Digital modulation formats
D All of the above

Answer: All of the above
9 2G standards support
A Limited internet browsing
B Short Messaging Service
C Both a & b
D None of the above

Answer: Both a & b
10 Commonly used mode for 3G networks is
A TDMA
B FDMA
C TDD
D FDD

Answer: FDD
11 CDMA2000 1xEV provides high speed data access with channel allocation of
A 5 MHz
B 50 MHz
C 1.25 MHz
D 4 MHz

Answer: 1.25 MHz
12 The interference between the neighboring base stations is avoided by
A Assigning different group of channels
B Using transmitters with different power level
C Using different antennas
D All of these

Answer: Assigning different group of channels
13 Centre excited hexagonal cells use
A Sectored directional antennas
B Omni directional antennas
C Yagi uda antennas
D None of the above

Answer: Omni directional antennas
14 The advantage of using frequency reuse is
A Increased capacity
B Limited spectrum is required
C Same spectrum may be allocated to other network
D All of the above

Answer: All of the above
15 In a fixed channel assignment strategy
A Each cell is assigned a predetermined set of frequencies
B The call is served by unused channels of the cell
C The call gets blocked if all the channels of the cell are occupied
D All of the above

Answer: All of the above
16 The power delay profile helps in determining
A Excess delay
B rms delay spread
C Excess delay spread
D All of the above

Answer: All of the above
17 Coherence bandwidth is
A Channel that passes all spectral components with equal gain
B The bandwidth of modulated signal
C Channel that passes all spectral components with linear phase
D Both a and c

Answer: Both a and c
18 Impulse response of a multipath channel is determined by the fact that
A Mobile radio channel may be modeled as linear filter
B Impulse response is time varying
C Both a & b
D None of the above

Answer: Both a & b
19 The received signal from a multipath channel is expressed as
A Convolution of transmitted signal and impulse response
B Addition of transmitted signal and impulse response
C Subtraction of transmitted signal and impulse response
D All of the above

Answer: Convolution of transmitted signal and impulse response
20 Direct RF pulse system helps in calculating
A Impulse response in frequency domain
B Impulse response in phase domain
C Power delay of the channel
D All of the above

Answer: Power delay of the channel

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