Question

Consider the following statements regarding the cellular system/network:

1. Cellular systems use open-loop power control and closed-loop power control.

2. For FDMA system, the capacity of a cable is more as compared to the number of frequency channels allocated to it.

3. A cell has L potential subscribers and is able to handle N simultaneous users. If L > N, then the system is referred to a nonblocking.

Which of the above statements are not correct?

1. 1 and 2 only
2. 1 and 3 only
3. 1, 2 and 3
4. 2 and 3 only
5.

Answer 1

Correct Answer - Option 2 : 1 and 3 only

The correct answer is option 2.

Statement 1: Cellular systems use open-loop power control and closed-loop power control.

False, Cellular systems use only open-loop power control. In closed-loop power control feedback going to get so it is not used for cellular systems.

Statement 2: For the FDMA system, the capacity of a cable is more as compared to the number of frequency channels allocated to it.

True,  FDMA system, the capacity of a cell is more compared to the number of frequency channels.

Statement 3: A cell has L potential subscribers and is able to handle N simultaneous users. If L > N, then the system is referred to as non-blocking.

False,  A cell has L potential subscribers and is able to handle N simultaneous users. if L>N, then the system is blocking.

• Open-Loop Power Control, there is no feedback either from mobile to BS or from BS to mobile.
• Closed-Loop Power Control, feedback is used for adjusting the transmit power level.