Wireless & Mobile Communications MCQ

Test your knowledge with important Wireless & Mobile Communications MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Wireless & Mobile Communications MCQs at Bissoy

• _______ is an additional open-loop MIMO technique considered by the WiMAX vendors.
  ক

  STTD

  খ

  SM

  গ

  Collaborative Uplink MIMO

  ঘ

  MU-MIMO
• _______ is a technique of transmit diversity used in UMTSS third-generation cellular systems.
  ক

  STTD

  খ

  SM

  গ

  Collaborative Uplink MIMO

  ঘ

  MU-MIMO
• MIMO means both transmitter and receiver have multiple antennas.
  ক

  True

  খ

  False
• Which of the following technology does not use MIMO?
  ক

  4G

  খ

  Wifi

  গ

  WiMax

  ঘ

  AMPS
• MIMO technology makes advantage of a natural radio wave phenomenon called _________
  ক

  Reflection

  খ

  Multipath

  গ

  Refraction

  ঘ

  Diffraction
• In MIMO, which factor has the greatest influence on data rates?
  ক

  The size of antenna

  খ

  The height of the antenna

  গ

  The number of transmit antennas

  ঘ

  The area of receive antennas
• MIMO stands for _______
  ক

  Many input many output

  খ

  Multiple input multiple output

  গ

  Major input minor output

  ঘ

  Minor input minor output
• Common data rates of IEEE 802.11 OFDM are ____________
  ক

  18 Mbps

  খ

  200 Mbps

  গ

  50 Mbps

  ঘ

  54 Mbps
• When we divide band of Orthogonal Frequency Division Multiplexing (OFDM) into sub bands, it diminishes effects of __________
  ক

  noise

  খ

  collision

  গ

  interference

  ঘ

  signals absence
• OFDM uses complex equalizers.
  ক

  True

  খ

  False
• OFDM is a technique for 3G mobile communication.
  ক

  True

  খ

  False
• In OFDMA, what is the relationship between the subcarrier spacing f and symbol time t?
  ক

  f=t

  খ

  f=1/2t

  গ

  f=1/t

  ঘ

  no relation
• Which property of OFDMA system allows adjacent subcarriers to be used without interference?
  ক

  Orthogonality

  খ

  Orthodoxy

  গ

  Octagonality

  ঘ

  Originality
• What processing step combines multiple OFDM subcarriers into a single signal for transmission?
  ক

  FFT

  খ

  IFFT

  গ

  RF combining

  ঘ

  Channel mapping
• What does the DC subcarrier indicate?
  ক

  Identity of the cell

  খ

  Antenna configuration

  গ

  Center of OFDM channel

  ঘ

  Format of data channel
• Why is a cyclic prefix required in an OFDMA?
  ক

  To ensure symbol time is an integer number

  খ

  To help overcome multipath and ISI

  গ

  To maintain orthogonality

  ঘ

  To make OFDMA scalable
• OFDMA stands for ________
  ক

  omnidirectional frequency division multiple access

  খ

  orthogonal frequency duplex multiple access

  গ

  orthogonal frequency divider multiple access

  ঘ

  orthogonal frequency division multiple access
• How much bandwidth is required to transmit the primary and secondary synchronization signals?
  ক

  1.08 MHz

  খ

  1.4 MHz

  গ

  930 kHz

  ঘ

  20 MHz
• Which RLC mode adds the least amount of delay to user traffic?
  ক

  Unacknowledged mode (UM)

  খ

  Acknowledged mode (AM)

  গ

  Low latency mode (LM)

  ঘ

  Transparent mode (TM)
• In LTE, what is the benefit of PAPR reduction in the uplink?
  ক

  Improved uplink coverage

  খ

  Lower UE power consumption

  গ

  Reduced equalizer complexity

  ঘ

  Improved uplink coverage, lower UE power consumption and reduced equalizer
• What is the largest channel bandwidth a UE is required to support in LTE?
  ক

  10 MHz

  খ

  20 MHz

  গ

  1.4 MHz

  ঘ

  5 MHz
• How often can resources be allocated to the UE?
  ক

  Every symbol

  খ

  Every slot

  গ

  Every subframe

  ঘ

  Every frame
• Which channel indicates the number of symbols used by the PDCCH?
  ক

  PHICH

  খ

  PDCCH

  গ

  PBCH

  ঘ

  PCFICH
• Which organization is responsible for developing LTE standards?
  ক

  UMTS

  খ

  3GPP

  গ

  3GPP2

  ঘ

  ISO
• What is the minimum amount of RF spectrum needed for an FDD LTE radio channel?
  ক

  1.4 MHz

  খ

  2.8 MHz

  গ

  5 MHz

  ঘ

  20 MHz
• What type of handovers is supported by LTE?
  ক

  Hard handover only

  খ

  Soft handover only

  গ

  Hard and soft handover

  ঘ

  Hard, soft and softest handover
• Which UE category supports 64 QAM on the uplink?
  ক

  Only category 5

  খ

  Only category 4

  গ

  Only category 3

  ঘ

  Category 3,4 and 5
• ____________ relies on IGMP.
  ক

  MMP

  খ

  RMDP

  গ

  RM2

  ঘ

  Mobicast
• __________ is a reliable multicast protocol and is used for both wired and wireless environments.
  ক

  MMP

  খ

  RMDP

  গ

  RM2

  ঘ

  Mobicast
• _______ is meant to be implemented for use on the MBONE.
  ক

  MMP

  খ

  RMDP

  গ

  RM2

  ঘ

  Mobicast