Wireless Communication MCQs and Answers with FREE PDF

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1. 2G standards support

a. Limited internet browsing
b. Short Messaging Service
c. Both a & b
None of the above

2. The 2G GSM technology uses a carrier separation of

a. 1.25 MHz
b. 200 KHz
30 KHz
d. 300 KHz

3. 3G W-CDMA is also known as

c. DCS-1800

4. Commonly used mode for 3G networks is

c. TDD
d. FDD

5. The minimum spectrum allocation required for W-CDMA is

a. 5MHz
c. 500KHz
d. 100KHz

6. CDMA2000 1xEV provides high speed data access with channel allocation of

a. 5 MHz
b. 50 MHz
c. 1.25 MHz
d. 4 MHz

7. Radio capacity may be increased in cellular concept by

a. Increase in radio spectrum        
b. Increasing the number of base stations & reusing the channels
Both a & b
d. None of the above

8. Hexagon shape is used for radio coverage for a cell because

a. It uses the maximum area for coverage
b. Fewer number of cells are required
c. It approximates circular radiation pattern
d. All of the above

9. Centre excited hexagonal cells use

a. Sectored directional antennas
b. Omni directional antennas
Yagi uda antennas
d. None of the above

10. Interference in frequency bands may lead to

a. Cross talk
b. Missed calls
c. Blocked calls
d. All of the above

11. Co-channel reuse ratio depends upon

a. Radius of the cell
b. Distance between the centers of the co channel cells
c. Frequency allocation of nearest cells
d. Both a and b

12. Traffic intensity is expressed in

a. Erlangs /MHz /km2
b. Erlangs
c. λ/ sec
d. dB/sec

13. Coherence time refers to

a. Time required to attain a call with the busy base station
b. Time required for synchronization between the transmitter and the receiver
c. Minimum time for change in magnitude and phase of the channel
d. None of the above

14. In spread spectrum technique, the multiple users are assigned with

a. Same spectrum and same PN code
b. Same spectrum and different PN code
Different spectrum and different PN code
d. Different spectrum and same PN code

15. Probability of outage refers to

a. Noise developed at the receiver
b. Number of bit errors during transmission
c. Signal to noise ratio
d. All of the above

16. The Linear Equalizer may be implemented as

a. FIR filter
b. Lattice filter
c. Low pass filter
d. Both a and b

17. Computational complexity of an algorithm refers to the

a. Number of operations for one iteration of algorithm
b. Inaccuracies in the mathematical analysis
c. Noise produced during one complete iteration of algorithm
d. All of the above

18. In time diversity

a. Multiple versions of signals are transmitted at different time instants
b. The signal is transmitted using multiple channels
c. Signal is transmitted with different polarization
d. All of the above

19. The speech coding technique that is dependent on the prior knowledge of the signal is

a. Waveform coders
b. Vocoders
c. Sub band coding
d. Block transform coding

20.  Vocal tract cepstral coefficients and excitation coefficients are separated by

a. Samplers
b. Linear filters
c. Encoders
d. Multiplexers

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