[데이터 통신]DataCommunication and Networking (forouzan)

소개

DataCommunication and Networking (forouzan)
chapter 6.
review questions

목차

1. what are the three major multiplexing techniques?
2. how does FDM combine multiple signals into one?
3. what is the purpose of a guard band?
4. how is one FDM signal separated into its original components?
6. how is WDM similar to FDM? how are they different?
7. how does TDM combine multiple signals into one?
8. how is one TDM signal separated into its original components?
11. how are T line related to DS service?
12. how can T line be used for analog transmission?
13. what is the relationship between the number of slots in a frame and the number of input lines for TDM?
14. is bit padding a technique for FDM or TDM? is the framing bit used in FDM or TDM?
15. what is inverse multiplexing?

본문내용

1. what are the three major multiplexing techniques?
FDM, WDM, TDM

2. how does FDM combine multiple signals into one?
각 송신장치로부터 생성된 신호를 각기 다른 반송 주파수로 변조한다.
이 변조신호들은 링크를 통해 이동할 수 있는 하나의 복합 신호로 합쳐지게 된다.

3. what is the purpose of a guard band?
신호가 겹치지 않게 하기 위해서

4. how is one FDM signal separated into its original components?
Demultiplexer에 의해서 원래 신호로 분리 된다.

5, describe the analog hierarchy in which groups of signals are successively multilpexed onto higher-bandwidth lines.


6. how is WDM similar to FDM? how are they different?
WDM은 다중화와 다중화 풀기가 광섬유 채널을 통해 전송된 빛 신호와 관련된다는 점을 제외하고는 FDM과 개념적으로 같다. 아이디어는 다른 주파수의 다른 신호를 결합하되 주파수가 매우 높다는데 있다

7. how does TDM combine multiple signals into one?
프레임을 사용한다.

8. how is one TDM signal separated into its original components?
interleaving과 synchronizing을 이용한다.

참고자료

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