"Radio and mobile communications faculty " from the subject "Radio frequency
transmission and reception devices".
FINAL REVIEW QUESTIONS
Theoretical questions
1. The function and principle of operation of amplifiers.
2. Classification of amplifiers
3. Connection schemes of transistors in amplifiers
4. The main technical indicators of amplifiers.
5. Operating modes of amplifiers.
6. Characteristics of class D amplifiers.
7. Electric signal concept. Types and parameters
8. Function and structure schemes of generators
9. Classification of generators
10. Generators in logical elements
11. The general principle of radio communication organization.
12. Laws of radio wave propagation
13. A simplified structure diagram of a single-channel radio line
14. Generalized structure diagram of the repeater
15. Classification of radio frequencies
16. diagram of a simple radio transmitter.
17. Function and principle of operation of radio transmission devices.
18. Classification of radio transmission devices.
19. Cascades and blocks of radio transmission devices.
20. Functions and types of radio receivers.
21. Classification of radio receiving devices.
22. Indicators of radio receiving devices.
23. The simplest structural scheme of a radio receiving device
24. Receiver with direct detection
25. Receivers with direct amplification
26. Superheterodyne receiver block diagram
27. The principle of converting and transmitting analog signals in digital
communication systems
28. Methods of digital manipulation of signals.
29. Amplitude manipulation of signals (ASK, QAM).
30. Signal phase manipulation (BPSK, QPSK).
31. Frequency manipulation of signals (FSK).
32. Multi-position manipulation methods i
33. Generalized construction diagram of an analog-to-digital converter.
34. Schematic diagram of a sequential approximation analog-to-digital
converter.
35. Structural diagram of a parallel analog-digital converter.
36. Digital signal processing in radio receivers
37. RF SRIB receiver structure
38. Receiver structure with SRIB on intermediate frequency
39. Generalized structural diagram of digital processing of analog signals
40. Classification of methods of organization of digital processing of signals
41. Software method of digital processing of signals
42. Digital signal processing hardware-software method
43. Features of the first generation radio receivers
44. Features of the second generation radio receivers
45. Features of the third generation radio receivers
46. Architectures for building digital signal processors
47. General structure of the input circuit of radio receivers
48. Schemes of input circuits of radio receivers
49. Input radio frequency (RCh) modules for multi-band subscriber devices.
50. Tri-band GSM ASM antenna switching module and FEM RCh tract access
module.
51. Options for using input RCh modules using switches and duplexers .
52. Using duplexers and diplexers in RCh modules .
53. RCh functional units and radio components. Combiners (Combiner).
54. RCh functional units and radio components. Distribution panels.
55. RCh functional units and radio components. Preselectors.
56. RCh functional units and radio components. Cable connections, jumpers
57. RCh functional units and radio components. Bandpass RCh filters.
58. RCh functional units and radio components. Intermediate frequency filters
59. General operating principles of sales communication systems
60. The structural scheme and main elements of the Sotali telephone
61. Basic units of the base station and their function
62. Content of Software Defined Radio technology.
63. Advantages of Software Defined Radio architecture.
64. A simplified architecture of Software Defined Radio.
65. Using Software Defined Radio architecture in mobile telephony.
66. The architecture of the mobile phone based on Software Defined Radio
technology.
67. General concepts of radio frequency amplifiers
68. The principle scheme of RChK with resonance contour
69. General concepts of frequency conversion
70. Signal mixers and converters for mobile communication devices .
71. Passive and active mixers.
72. Balanced mixers.
73. Diode mixers.
74. Schematic of an unbalanced diode mixer.
75. Scheme of a balanced mixer with a hybrid transformer.
76. Dual balanced mixer circuit.
77. double-balanced mixer .
78. Simplified basic assembly schemes of mixers in bipolar transistors .
79. Simplified basic assembly schemes of mixers in field-effect transistors
80. Detection methods and characteristics of detectors
81. Amplitude detector. Work modes
82. Detection of ChM signals. Balanced ChD scheme
83. FM signal detection. Balanced FD scheme
84. Detection of digitally manipulated signals
85. Classification and areas of application of digital RRLs.
86. The structure of the radio relay communication line.
87. Principles of satellite communication organization and YESY orbits.
88. Satellite navigation
89. Requirements for the television transmission system
90. Specific characteristics of image and sound radio signal transmission
91. Structure diagram of digital television system
92. Transmission part of digital TV communication system
93. Structure of a transmitter with analog quadrature signal processing
94. Generalized structural scheme of the optical transmission system of TV
signals
95. Features of television receivers
96. Schematic diagram of a color television receiver
97. Schematic diagram of SK TV
98. Generalized schematic diagram of subscriber digital receiver (STB).
99. Features of radio broadcasting receivers
100.
Stereophonic broadcasting