Friday 20 September 2013

Simplex And Dupex in Telecommunication

In telecommunication Simplex in term used for one way communication i.e the device can either transmit only or receive only means it has the ability to either transmit only or receive only.

Half duplex is the term used for two way communication i.e the device can transmit as well as receive but only one task can be done at a time i.e it has has the ability to transmit and receive but only one task can be done at a time.

Full duplex is a term used for two way communication where the device can transmit as well as receive at time simultaneously.


Now a days two types of duplex techniques are most prevailing in telecommunication. These are FDD and TDD.

In FDD the device can transmit as well as receive simultaneously at a time over different frequencies , In FDD the frequency used for receiving is different for frequency used in transmitting the data.

In TDD the device receive for a particular period of time and transmit for another period of time at same frequency, and this process continues to form a complete duplex.

NOTE :  In FDD  frequency for transmitting and receiving the data is different and  In TDD frequency for transmitting and receiving the data is same.

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