Quiz on Wireless Cellular Systems

Which of the following is not a part of the characteristic of 4G network?

• a) Multirate management

• b) Fully converged services

• c) Software dependency

• d) Diverse user devices

2. 2.What does SGSN stands for?

• Serving GPRS Support Node

• Supporting GGSN Support Node

• Supporting GPRS Support Node

• Supporting Gateway Support Node

Hybrid ARQ is part of the ____________ layer.

• a) PDCP
  
  
  
  

• b) RLC

• c) MAC

• d) PHY

4. OFDMA stands for ________

• a) omnidirectional frequency division multiple access
  
  
  

• b) orthogonal frequency duplex multiple access

• c) orthogonal frequency divider multiple access

• d) orthogonal frequency division multiple access

5. 5.Why is a cyclic prefix required in an OFDMA?

• a) To ensure symbol time is an integer number
  
  
  

• b) To help overcome multipath and ISI

• c) To maintain orthogonality

• d) To make OFDMA scalable

6. 6. Which property of OFDMA system allows adjacent subcarriers to be used without interference?

• a) Orthogonality
  
  
  

• b) Orthodoxy

• c) Octagonality

• d) Originality

7.TDD is effective for _________

• a) Fixed wireless access and users are stationary
  
  
  

• b) Dynamic wireless access and users are stationary

• c) Fixed wireless access and users are moving

• d) Dynamic wireless access and users are moving

8.___________ is a digital multiple access system in which carrier frequencies are varied in pseudorandom order.

• a) CDMA
  
  
  
  

• b) FCDMA

• c) FHMA

• d) SDMA

9.____________ arises from the fact that the spreading sequences of different users are not orthogonal.

• a) Near-far problem
  
  
  

• b) Line of sight

• c) Windowing

• d) Self jamming

10. 10. Which is more simpler to implement?

• a) Direct sequence spread spectrum
  
  
  

• b) Frequency hopping spread spectrum

• c) Time hopping spread spectrum

• d) None of the mentioned