Multiplexing Flashcards
When are signals multiplexed?
When multiple signals are carried through a single transmission medium at the same time
Once a multiplexed signal reaches its destination, it must be _______
demultiplexed
What are the 3 methods of multiplexing?
Frequency division multiplexing, time division multiplexing, and code division multiplexing
In FDM, a specific ______ is dedicated to a specific channel
frequency
In TDM, a specific _______ is dedicated to a specific channel
time interval
In FDM, what is the minimum amount the carrier frequencies must be separated by?
The bandwidth of the individual signals to be transmitted
What type of multiplexing should be used when the transmission media has a bandwidth many times larger than the signal to be transmitted?
FDM
What does ADSL stand for?
Asymmetric Digital Subscriber Line
ADSL used ___ and Cable uses ___
FDM, TDM
Wavelength Division multiplexing uses …
optical fibre
In WDM, each light in the fibre is a different _______, each carrying a signal that can be decoded.
wavelength
In _________ TDM, all time slots are predetermined and can have no data to transmit pretty often
synchronous
In statistical TDM, …
time slots are filled as data is available. Rather than transmitting an idle signal from source i, transmit data from source j
In statistical TDM, if there is more incoming data than outgoing data, the excess data is ______ in the multiplexer to be sent later
buffered
Since sources in statistical TDM is not in a predefined order, each channel must contain an _____ the indicates the source
address
