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

文章目录[隐藏]

1. Introduction to Wireless Communication quiz
【作业】1. Introduction to Wireless Communication homework
2. Radio Propagation quiz
【作业】2. Radio Propagation homework
【作业】1. Introduction to Wireless Communication homework (new)
【作业】3. Narrowband Channel homework
3. Narrowband Channel quiz
4. Broadband and Directional Channel quiz
【作业】4. Broadband and Directional Channel homework
5. Digital Modulation and Demodulation quiz
【作业】5. Digital Modulation and Demodulation homework
【作业】6. Channel Coding homework
6. Channel Coding quiz

本答案对应课程为:点我自动跳转查看
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
】