Quiz 3: Wcdma For Umts Hspa Evolution And Lte: Chapter 3 Introduction To Wcdma

19 Questions | Total Attempts: 238

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Quiz 3: Wcdma For Umts Hspa Evolution And Lte: Chapter 3 Introduction To Wcdma

By Dr. Munther Gdeisat For more WCDMA/HSPA quizzes, follow the link https://sites. Google. Com/site/4gacademy1/courses/course-b


Questions and Answers
  • 1. 
    • A. 

      For this DS-CDMA, the spreading factor is 1

    • B. 

      For this DS-CDMA, the spreading factor is 2

    • C. 

      For this DS-CDMA, the spreading factor is 4

    • D. 

      For this DS-CDMA, the spreading factor is 8

  • 2. 
    The duration for WCDMA frame is
    • A. 

      10 ms

    • B. 

      20 ms

    • C. 

      100 ms

    • D. 

      200 ms

  • 3. 
    • A. 

      The multiplexing mode shown in the figure is TDD

    • B. 

      The multiplexing mode shown in the figure is FDD

  • 4. 
    • A. 

      The multiplexing mode shown in the figure is TDD

    • B. 

      The multiplexing mode shown in the figure is FDD

  • 5. 
    The processing gain is equal to the spreading factor
    • A. 

      True

    • B. 

      False

  • 6. 
    WCDMA has a frequency reuse of 1 between different cells. This means that the same frequencies can be reused in neighboring cells.
    • A. 

      True

    • B. 

      False

  • 7. 
    Multipath diversity could be useful in 3G wireless mobile communications.
    • A. 

      True

    • B. 

      False

  • 8. 
    Fast fading could be useful in 3G wireless mobile communications.
    • A. 

      True

    • B. 

      False

  • 9. 
    Multipath diversity occurs when the time difference between different paths is larger than the duration of a chip (0.26 micro seconds = 1/3.84 MHz).
    • A. 

      True

    • B. 

      False

  • 10. 
    Fast fading occurs when the path difference between two received signals is half wavelength approximately (7 cm at 2 GHz).
    • A. 

      True

    • B. 

      False

  • 11. 
    Fast fading can be removed with the aid of
    • A. 

      Strong coding

    • B. 

      Pilot symbols

    • C. 

      Retransmission protocols

    • D. 

      Time diversity

  • 12. 
    Tight and fast power control is very important for WCDMA, especially in the
    • A. 

      Uplink

    • B. 

      Downlink

  • 13. 
    A base station mainly uses --------------------- to control the output power of mobiles.
    • A. 

      Open loop power control

    • B. 

      Closed loop power control

  • 14. 
    In an uplink fading channel, the mobile output power propotions --------------------- to the base station received power (SIR).
    • A. 

      Directly

    • B. 

      Inversely

  • 15. 
    The target Signal to Interference Ratio (SIR) is determined in the
    • A. 

      Base station

    • B. 

      Radio network controller

  • 16. 
    • A. 

      This image refers to soft handover

    • B. 

      This image refers to softer handover

  • 17. 
    • A. 

      This image refers to soft handover

    • B. 

      This image refers to softer handover

  • 18. 
    During softer handover only one power control loop per connection is active.
    • A. 

      True

    • B. 

      False

  • 19. 
    During soft handover two power control loops per connection are active
    • A. 

      True

    • B. 

      False

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