Quiz 3: Wcdma For Umts Hspa Evolution And Lte: Chapter 3 Introduction To Wcdma
.jpg "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
- 1.
![- ProProfs]()
- 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.
![- ProProfs]()
- A.
The multiplexing mode shown in the figure is TDD
- B.
The multiplexing mode shown in the figure is FDD
- 4.
![- ProProfs]()
- 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.
![- ProProfs]()
- A.
This image refers to soft handover
- B.
This image refers to softer handover
- 17.
![- ProProfs]()
- 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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