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Academic-Wireless FAQ section(Wireless Interview Questions and Answers)

This page covers very useful Wireless, signal processing FAQs for those appearing for interview. These are also useful as viva questions.

Following is a list of wireless FAQs:

1. What is OFDM?

2. Explain advantages and disadvantages of OFDM over single career system.

3. What is OFDMA?

4. What is the difference between OFDM and OFDMA?

5. What is the gain of an antenna?

6. What is the beam width of antenna?

7. What is G/T of an antenna?

8. What is the Friis path loss formula?

9. What is the function of satellite transponder?

10. How are the basic parameters do you test to validate Wireless Transmitter?

11. How are the basic parameters do you test to validate Wireless Receiver?

12. What is the difference between harmonics and spurious?

13. What are the basic building blocks in a typical wireless system?

14. What all impairments get incorporated from transmitter section of data to be transmitted till the receiver section in common wireless system?

15. What is Rayleigh Fading?

16. What is BER?

17. What is EVM?

18. Explain various types of Antenna Diversity?

19. Explain techniques of MIMO?

20. What is SIMO?

21. Why Forward Error Correction is required in wireless system?

22. How is the data rate calculated for broadband technologies viz, WLAN and WiMAX based on OFDM?

23. Why BPSK is preferable for critical part of the frame to be transmitted in communication system?

24. What is the difference between BPSK and QPSK modulation schemes?

25. What is the difference between QPSK and OQPSK?

26. Why scrambler is used in wireless system?

27. Can you explain function of AGC in the wireless system?

28. Can you explain effect of I-Q DC offset in the transmitter?

29. Explain Dynamic range of ADC.

30. Explain OSI layer and function of each layer in brief.

31. What is the basic function of Physical (PHY) layer in wireless system?

32. What is the basic function of MAC layer in wireless system?

33. What is DAMA?

34. What is the difference between FDMA and TDMA?

35. What is the function of OMT in VSAT?

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