OFDM - MCQs with answers

OFDM - MCQs with answers

Q1. OFDM is a technique of

1. encoding digital data
2. multiple carrier frequencies
3. wide band digital communication
4. 4G mobile communication

a. 1,2 and 3 are correct
b. 2 and 3 are correct
c. 1, 2 and 4 are correct
d. All the four correct

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Q2. Advantages of using OFDM include

1. Avoids complex equalizers
2. Low symbol rate and guard interval
3. Avoids ISI
4. Multiple users at same frequency

a. 1,2 and 3 are correct
b. 2 and 3 are correct
c. 1, 2 and 4 are correct
d. All the four correct

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Q3. The troubles that OFDM faces over other spread spectrum techniques are

1. Sensitivity to Doppler shift
2. Frequency synchronization problems
3. Time synchronization problems
4. Low efficiency due to guard intervals

a. 1,2 and 3 are correct
b. 2 and 3 are correct
c. 1, 2 and 4 are correct
d. All the four correct

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Q4. The guard interval is provided in OFDM

a. To eliminate the need of pulse shaping filter
b. To eliminate ISI
c. High symbol rate
d. Both a) and b)
e. Both b) and c)

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