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1. How is the antenna gain obtained? A. Using power amplifier in an antenna system B. Make the antenna radiation more concentrated C. Use high efficiency antenna feeders D. Equipment using low standing wave ratio Answer: B
2. If DTX technology is used, the phone does not need to transmit anything during the interval of voice. A. True B. False Answer: A
3. Which of the following radio wave bands does the frequency band currently used by the GSM system belong to? A. Super high frequency (SHF) B. Very high frequency (VHF) C. Ultra High Frequency (UHF) D. Extremely high frequency (EHF) Answer: C
4. In the mobile communication system, the diffraction capability and penetration capability of the 900M signal are better than the 1800M signal. A. True B. False Answer: B
5. A 10W power signal, after an attenuator (the loss is 6dB), the power is? A. 10W B. 1W C. 5W D. 2.5W Answer: D
6. The location area is a subset of the routing area, and one or more location areas form a routing area. A. True B. False
Answer: B
7. E-GSM frequency band means: A. 890-915MHz, 935-960MHz B. 876-915MHz, 921-960MHz C. 880-915MHz, 925-960MHz D. 824-849MHz, 869-894MHz Answer: C
8. According to the GSM specification, if the receiving sensitivity of the base station is -110 dBm, then in order to ensure normal operation, the maximum value of the first adjacent interference level of the carrier frequency is? A. 9dB B. -9dB C. -101dBm D. -119dBm Answer: C
9. Slow fading rate is mainly determined by? A. Frequency B. Phase C. Amplitude D. Communication environment Answer: D
10. GSM frequency hopping mode can be divided into frame hopping and slot hopping according to time domain. Frame hopping means that each hopping frequency point is changed once every TDMA frame period, and slot hopping refers to the frequency change of each slot of TDMA frame once. A. True B. False Answer: A
11. GSM uses which multiple access multiplexing? A. Time division multiplexing and frequency division multiplexing B. Frequency division multiplexing and code division multiplexing C. Code division multiplexing and space division multiplexing D. Space division multiplexing and time division multiplexing
Answer: A
12. GSM 2.5 generation communication system is? A. GPRS B. AMPS C. TACS D. GPS Answer: A
13. The 1800M GSM bandwidth allocated by the country to China Unicom is? A. 5MHz B. 10MHz C. 8MHz D. 6MHz Answer: B
14. GSM base station subsystem includes? A. Base station controller and base station B. Switches and base stations C. Home location register D. Mobile phones and base stations Answer: A
15. The bandwidth of a frequency point of GSM is? A. 200KHz B. 30KHz C. 3.75MHz D. 1.25MHz Answer: A
16. Mobile phone first access to mobile communication network through which device? A. Base station B. Base station controller C. Switch D. Location register Answer: A
17. What kind of channel is the BCCH abbreviation? A. Broadcast channel B. Traffic channel C. Dedicated control channel D. Access channel Answer: A
18. CDMA and GSM communication systems belong to cellular mobile communication systems, and which one belongs to cellular mobile communication systems? A. CDMA B. GSM C. Both are D. neither is Answer: C
19. How does the signal travel between the phone and the antenna? A. Through telephone line B. Through the fiber C. Through radio waves D. Through the cable Answer: C
20. China's independent research and development of 3G standards is: A. WCDMA B. CDMA 1X EvDO C. GPRS D. TD-SCDMA Answer: D
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