Diversity Techniques MCQ

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• In maximal ratio combining, the output SNR is equal to __________
  ক

  Mean of all individual SNRs

  খ

  Maximum of all SNRs

  গ

  Sum of individual SNR

  ঘ

  Minimum of all SNRs
• Time diversity repeatedly transmits information at time spacings that exceed ___________
  ক

  Coherence bandwidth

  খ

  Dwell time

  গ

  Run time

  ঘ

  Coherence time
• Frequency diversity is good for low traffic conditions.
  ক

  True

  খ

  False
• Frequency diversity uses ________ as a diversity element.
  ক

  Correlation coefficient

  খ

  Coherence time

  গ

  Coherence bandwidth

  ঘ

  SNR
• Frequency diversity is implemented by transmitting information on more than one ___________
  ক

  Carrier frequency

  খ

  Amplitude

  গ

  Phase

  ঘ

  Modulation scheme
• Which of the factor does not determine the correlation coefficient?
  ক

  Polarization angle

  খ

  Cross polarization discrimination

  গ

  Offset angle from the main beam direction

  ঘ

  Coherence time
• Polarization diversity uses the ________ as the diversity element.
  ক

  Modulation index

  খ

  Carrier frequency

  গ

  Reflection coefficient

  ঘ

  Coherence time
• In selection diversity, the gain of each diversity branch provides different SNR.
  ক

  True

  খ

  False
• Large scale fading can be mitigated with the help of _________
  ক

  Modulation

  খ

  Demodulation

  গ

  Macroscopic diversity technique

  ঘ

  Microscopic diversity technique
• ____________ is used to prevent deep fade for rapidly varying channel.
  ক

  Modulation

  খ

  Demodulation

  গ

  Macroscopic diversity technique

  ঘ

  Microscopic diversity technique
• Small scale fades are characterized by ____________ amplitude fluctuations.
  ক

  Large

  খ

  Small

  গ

  Rapid

  ঘ

  Slow
• Diversity decisions are made by ____________
  ক

  Receiver

  খ

  Transmitter

  গ

  Channel

  ঘ

  Adaptive algorithms
• Diversity requires a training sequence.
  ক

  True

  খ

  False