OFDMA Interview Questions

Q: OFDMA stands for ________

The correct answer is orthogonal frequency division multiple access

Q: Why is a cyclic prefix required in an OFDMA?

The correct answer is To help overcome multipath and ISI

Q: What does the DC subcarrier indicate?

The correct answer is Center of OFDM channel

Q: Which property of OFDMA system allows adjacent subcarriers to be used without interference?

The correct answer is Orthogonality

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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

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

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

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

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

Correct Answer is : Orthogonality

OFDMA interview questions