Flashcards
Multiplexing and Demultiplexing
Cards in this deck (6)
- 1What are the basic types of multiplexing?- Frequency Division Multiplexing FDM
- Wavelength Division Multiplexing WDM
- Time division Multiplexing TDM
- Code division Multiplexing CDM - 2How does FDM use electromagnetic radiation?In FDM, a set of radio stations can transmit electromagnetic signals simultaneously without interference provided they each use a separate channel
- 3What is a guard band?a set of carrier frequencies with a gap between them is a guard band, this reduces the possible interference
- 4How can a range of frequencies be used to increase data rate?To increase the overall data rate, a sender divides the frequency range of the channel into K carriers, and sends 1/K of the data over each carrier
- 5what is the key mechanism used to combine or separate wavelengths of light in a WDM system?Prism, a multiplexor accepts beams of light of various wavelengths and uses a prism to combine them to a single beam; a demultiplexor uses a prism for the inverse
- 6In a hierarchical TDM system, how do you calculate the bit rate?bit rate = number of input lines x bit rate of individual line + framing bits
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- Bachelors Degree Computer Networking (Data Communications) Flashcards on Multiplexing and Demultiplexing, created by Charlie Tizzard Ó Kevlahan on 31/05/2016.
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- Charlie Tizzard Ó Kevlahan
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