Updated WIRELESS COMMUNICATION LAB VIVA INTERVIEW SHORT Questions And Answers PDF Free Download

Updated WIRELESS COMMUNICATION LAB VIVA INTERVIEW SHORT Questions And Answers PDF Free Download:-

 

Updated WIRELESS COMMUNICATION LAB VIVA INTERVIEW SHORT Questions And Answers PDF Free Download

1. What is meant by frequency reuse?
2. What are the trends in cellular radio systems?
3. What do you mean by forward and reverse channel?
4. What is the function of control channel? What are the types?
5. What is channel assignment? What are the types?
6. What is fixed channel assignment?
7. What is dynamic channel assignment?
8. Define MS, BS and MSC.
9. Define hand off and mode of hand off.
10. Write the types of hand off.
11. Define Cell, Cluster.
12. What do you mean by foot print and dwell time?
13. What are the major types of cellular interference?
14. What are the techniques used to expand the capacity of cellular system?
15. What is frequency reuse ratio?
16. Define FDMA, TDMA and CDMA.
17. Define Grade of service.
18. What is blocked call clear system (BCC)?
19. What is blocked call delay system?
20. Define cell splitting.
21. What is sectoring?
22. What are the features of TDMA?
23. What are the features of FDMA?
24. What are the propagation mechanisms of EM waves?
25. What is the significance of propagation model?
26. What do you mean by small scale fading?
27. What are the factors influencing small scale fading?
28. When does large scale propagation occur?
29. Differentiate the propagation effects with mobile radio.
30. Define Doppler shift.
31. Differentiate time selective and frequency selective channel.
32. Define coherence time and coherence bandwidth.
33. What do you mean by WSSUS channels?
34. What is free space propagation model?
35. Define EIRP.
36. Explain path loss.
37. What is intrinsic impedance and Brewster angle?
38. What is scattering?
39. Define radar cross section.
40. Name some of the outdoor propagation models?
41. Define indoor propagation models.
42. Mention some indoor propagation models?
43. What are merits and demerits of Okumara’s model?
44. List the advantages and disadvantages of Hata model?
45. What is the necessity of link budget?
46. List the advantages of digital modulation techniques.
47. What are the factors that influence the choice of digital modulation?
48. Define power efficiency and bandwidth efficiency.
49. What is QPSK?
50. Define offset QPSK and π/4 differential QPSK.
51. What is meant by MSK?
52. List the salient features of MSK scheme.
53. Why GMSK is preferred for multiuser, cellular communication?
54. How can we improve the performance of digital modulation under fading channels?
55. Write the advantages of MSK over QPSK.
56. Define M-ary transmission system?
57. What is quadrature modulation?
58. What is QAM?
59. Define QPSK
60. What is linear modulation?
61. Define non linear modulation.
62. What is the need of Gaussian filter?
63. Mention some merits of MSK.
64. Give some examples of linear modulation.
65. What are the techniques used to improve the received signal quality?
66. What is the need of equalization?
67. What is diversity?
68. Define spatial diversity.
69. Define STCM.
70. Define adaptive equalization?
71. Define training mode in an adaptive equalizer?
72. What is tracking mode in an adaptive equalizer?
73. Write a short note on linear equalizers and non linear equalizers?
74. Why non linear equalizers are preferred?
75. What are the nonlinear equalization methods used?
76. What are the factors used in adaptive algorithms?
77. Define diversity concept.
78. How the link performance can be improved?
79. Why diversity and equalization techniques are used?
80. Differentiate selection diversity and combining diversity.
81. Define Switched Diversity
82. Define feedback or scanning diversity.
83. Define temporal diversity.
84. What is meant by frequency diversity?
85. Differentiate micro and macro diversity.
86. What is transmit diversity?
87. What is an equalizer?
88. What is linear and non-linear equalizer?
89. Write the two types of spread spectrum?
90. What do you mean by spread spectrum?
91. What is PN sequence?
92. When is the PN sequence called as maximal length sequence?
93. Write the properties which a PN sequence should have.
94. Define chip duration and chip rate.
95. What do you mean by processing gain of a spread spectrum?
96. List the advantages and disadvantages of DS-SS.
97. Define jamming and jamming margin.
98. What is meant by anti-jamming?
99. List the advantages and disadvantages of FH-SS.
100. List the types of FH-SS.
101. Compare slow and fast FH-SS.
102. Compare DS-SS and FH-SS.
103. State the principles of CDMA.
104. How the capacity can be increased in CDMA?
105. Write short notes on OFDM.
106. Why cyclic prefix?
107. Write the goals of GSM standard.
108. What is W-CDMA?
109. What are the services offered by GSM?