大学MOOC Fundamentals of Wireless Communications(Beijing Jiaotong University)1461319172 最新慕课完整章节测试答案
1. Introduction to Wireless Communication
文章目录
quiz
1、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、单选题：
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、多选题：
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、多选题：
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、多选题：
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、多选题：
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、多选题：
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、多选题：
Which are short-range wireless communication systems?
选项：
A: Bluetooth
B: RFID
C: UWB
D: NFC
答案: 【 Bluetooth;
RFID;
UWB;
NFC】
18、多选题：
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、多选题：
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】
2. Radio Propagation
quiz
1、单选题：
Which is used to describe the relationship between transmitted power and received power in free-space propagation?
选项：
A: Friis’ Law
B: Huygens principle
C: Snell’s Law
D: Shannon Theory
答案: 【 Friis’ Law】
2、单选题：
For direct propagation, where the transceiver is at a certain distance, the relationship between path loss and carrier frequency is_____.
选项：
A: As the frequency increases, the path loss becomes larger.
B: As the frequency increases, the path loss becomes smaller.
C: Path loss is independent of f