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Orthogonal Frequency Division Multiplexing interview questions
Orthogonal Frequency Division Multiplexing interview questions
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Total Questions: 5
1. OFDMA stands for ________
A. omnidirectional frequency division multiple access
B. orthogonal frequency duplex multiple access
C. orthogonal frequency divider multiple access
D. orthogonal frequency division multiple access
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Correct Answer is :
orthogonal frequency division multiple access
2. Why is a cyclic prefix required in an OFDMA?
A. To ensure symbol time is an integer number
B. To help overcome multipath and ISI
C. To maintain orthogonality
D. To make OFDMA scalable
Show Correct Answer
Correct Answer is :
To help overcome multipath and ISI
3. What does the DC subcarrier indicate?
A. Identity of the cell
B. Antenna configuration
C. Center of OFDM channel
D. Format of data channel
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Correct Answer is :
Center of OFDM channel
4. What processing step combines multiple OFDM subcarriers into a single signal for transmission?
A. FFT
B. IFFT
C. RF combining
D. Channel mapping
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Correct Answer is :
IFFT
5. Which property of OFDMA system allows adjacent subcarriers to be used without interference?
A. Orthogonality
B. Orthodoxy
C. Octagonality
D. Originality
Show Correct Answer
Correct Answer is :
Orthogonality
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