2021 Fundamentals of Wireless Communications(Beijing Jiaotong University) 最新满分章节测试答案

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本课程起止时间为:2021-04-19到2021-07-09
本篇答案更新状态:已完结

1. Introduction to Wireless Communication quiz

1、 问题:Wireless communication is a communication method that uses the characteristics of electromagnetic waves to propagate in space to exchange                       .
选项：
A:energy
B:information
C:matter
D:both matter and energy
答案: 【information】

2、 问题:Which one has the longest wavelength (i.e. the lowest frequency), among the following electromagnetic waves?
选项：
A:Microwave
B:Infrared ray
C:Visible light
D:Ultrashort wave
答案: 【Ultrashort wave】

3、 问题:Which description of the characteristics of millimeter wave communication is incorrect?
选项：
A:It has wide available spectrum.
B:It has large transmission loss and short transmission distance.
C:The RF devices are easy to be miniaturized.
D:The cost of RF devices is low.
答案: 【The cost of RF devices is low.】

4、 问题:The physicist who first confirmed that electromagnetic waves can propagate across space via experiments is                        
选项：
A:Michael Faraday
B:Isaac Newton
C:James Clerk Maxwell
D:Heinrich Rudolf Hertz
答案: 【Heinrich Rudolf Hertz】

5、 问题:Which is NOT the wireless communications systems?
选项：
A:Satellite communication system
B:Optical fiber communication system
C:Cellular mobile communication system
D:Bluetooth communication system
答案: 【Optical fiber communication system】

6、 问题:Which is NOT the feature of the first generation cellular mobile communications (1G)?
选项：
A:Analog communications
B:Only carry voice services
C:Low cost
D:Bulky terminals
答案: 【Low cost】

7、 问题:Which is NOT the standard of the third generation mobile communications (3G)?
选项：
A:GSM
B:WCDMA
C:TD-SCDMA
D:CDMA2000
答案: 【GSM】

8、 问题:Which one below does NOT belong to the millimeter wave band?
选项：
A:28 GHz
B:38 GHz
C:73 GHz
D:2.4 GHz
答案: 【2.4 GHz】

9、 问题:Who established information theory in 1948?
选项：
A:Martin Lawrence Cooper
B:Claude Elwood Shannon
C:Andrew J. Viterbi
D:Michael Faraday
答案: 【Claude Elwood Shannon】

10、 问题:Which is NOT the feature of broadcast/television communications system?
选项：
A:Unidirectional transmission
B:Wide coverage
C:Low cost
D:Able to call or be called
答案: 【Able to call or be called】

11、 问题:In 2019, _____ cellular mobile communications system is put into commercial use in China.
选项：
A:2G
B:3G
C:4G
D:5G
答案: 【5G】

12、 问题:5G system application scenarios include                       .
选项：
A:enhanced mobile broadband communications (eMBB)
B:massive machine-type communications (mMTC)
C:ultra-reliable low latency communications (uRLLC)
D:Wide area coverage communications
答案: 【enhanced mobile broadband communications (eMBB);
massive machine-type communications (mMTC);
ultra-reliable low latency communications (uRLLC)】

13、 问题:In wireless communications, which characteristics of electromagnetic waves can be used to carry information.
选项：
A:Amplitude
B:Frequency
C:Polarization mode
D:Polarization mode
答案: 【Amplitude;
Frequency;
Polarization mode;
Polarization mode】

14、 问题:Who are the inventors of the radiotelegraph?
选项：
A:James Clerk Maxwell
B:Heinrich Rudolf Hertz
C:Alexander Stepanovich Popov
D:Guglielmo Marconi
答案: 【Alexander Stepanovich Popov;
Guglielmo Marconi】

15、 问题:Which are the features of satellite communications?
选项：
A:Wide coverage
B:The cost of building is not related to the communication distance
C:Good resistance
D:Low transmission latency
答案: 【Wide coverage;
The cost of building is not related to the communication distance;
Good resistance】

16、 问题:Which are the features of wireless local area network (WLAN)?
选项：
A:High transmission rate
B:Mainly use licensed frequency bands
C:Good compatibility
D:Miniaturization and low cost
答案: 【High transmission rate;
Good compatibility;
Miniaturization and low cost】

17、 问题:Which are short-range wireless communication systems?
选项：
A:Bluetooth
B:RFID
C:UWB
D:NFC
答案: 【Bluetooth;
RFID;
UWB;
NFC】

18、 问题:Which statements about LTE are correct?
选项：
A:Including LTE FDD and TD-LTE two standards
B:High transmission rate
C:Flexible system deployment
D:Guaranteed quality of service
答案: 【Including LTE FDD and TD-LTE two standards;
High transmission rate;
Flexible system deployment;
Guaranteed quality of service】

19、 问题:The goals of wireless communication include_.
选项：
A:The goals of wireless communication include.
B:High transmission reliability
C:Low cost
D:Energy saving and environmental protection
答案: 【The goals of wireless communication include__.;
High transmission reliability;
Low cost;
Energy saving and environmental protection】

【作业】1. Introduction to Wireless Communication homework

小提示:本节包含奇怪的同名章节内容

1、 问题:Please briefly describe the current challenges of wireless communications.
评分规则: 【 TBD
】

2、 问题:Please briefly describe the three major application scenarios of the 5th generation wireless communications (5G) and the main services?
评分规则: 【 TBD
】