20-02-2017, 04:08 PM
Hi am kavitha i would like to get details on ppt for mobile train radio communication
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ppt for mobile train radio communication
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Hi am kavitha i would like to get details on ppt for mobile train radio communication
30-03-2017, 12:35 PM
Communication between mobile units can be half-duplex or full-duplex. In the case of half-duplex, the transmission and reception communications between the mobile units are not at the same time, ie talking and listening can not be done at the same time. In case of full-duplex communication, the transmission and reception communication is at the same time, that is, you can speak and listen at the same time. When the communications between mobile units are inside a cell, and if it is half-duplex, then it will require only one frequency pair. If it is full-duplex, then the frequency pair requirement will be two.
When a mobile unit communicates with a mobile unit outside the cell, then the frequency pair requirement will be one per cell for both half-duplex communication and full-duplex communication. Therefore, system resources are used more if mobile units communicate with each other in full duplex mode.
RADIO SYSTEMS FOR MOBILE TRAINS
Current scenario
A choice of the mobile system for an assembly is governed mainly by the following facts.
Ø Coverage area
Ø Number of subscribers to be served
Ø Frequency spectrum available
Ø Nature of the terrain
Ø Type of application, ie data voice or both
Ø Integration with other systems
Ø Future technological migration capacity
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