[1] What is the main advantage of OFDMA technology in wireless communication systems?
a) Increased channel capacity
b) Improved signal quality
c) Reduced interference
d) All of the above
[2] Which of the following is not a characteristic of OFDMA technology?
a) Orthogonality of subcarriers
b) Frequency reuse
c) Time division multiplexing
d) None of the above
[3] How many subcarriers are typically used in an OFDMA system?
a) 32
b) 64
c) 128
d) 256
[4] Which of the following is not a requirement for an OFDMA system to operate effectively?
a) High quality channel estimation
b) Low power transmission
c) High data rate
d) None of the above
[5] What is the main purpose of using subcarriers in OFDMA technology?
a) To increase the data rate
b) To reduce interference
c) To improve signal quality
d) All of the above
[6] What is the main difference between OFDMA and CDMA technology?
a) OFDMA uses orthogonal subcarriers while CDMA uses spreading codes
b) OFDMA is a multiple access technique while CDMA is a spread spectrum technique
c) OFDMA is used in wireless communication while CDMA is used in wired communication
d) None of the above
[7] Which of the following is not a benefit of using OFDMA technology?
a) Increased capacity
b) Improved spectral efficiency
c) Reduced delay
d) None of the above
[8] In OFDMA, how are subcarriers allocated to different users?
a) On a first come, first serve basis
b) Based on the user's transmission power
c) Based on the user's channel condition
d) All of the above
[9] In an OFDMA system, what is the main function of the scheduler?
a) To allocate subcarriers to different users
b) To manage interference
c) To control the transmission power
d) All of the above
[10] What is the main advantage of using OFDMA in 4G and 5G wireless communication systems?
a) Increased capacity
b) Improved spectral efficiency
c) Reduced delay
d) All of the above
Answers:
- d) All of the above
- c) Time division multiplexing
- d) 256
- b) Low power transmission
- d) All of the above
- a) OFDMA uses orthogonal subcarriers while CDMA uses spreading codes
- d) None of the above
- d) All of the above
- d) All of the above
- d) All of the above