Problems that OFDM faces over spread spectrum techniques

Q.  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

- Published on 18 Nov 15

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

ANSWER: 1, 2 and 4 are correct

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