Explain: a)FDD b)TDD

Explain:

a.)FDD
b.)TDD

a) FDD

- Frequency Division Duplex is one of the techniques, in which one frequency band is utilized for transmitting and another used for receiving.
- To uplink the carrying data from mobile phones to the base station, one electromagnetic block spectrum is allocated
- Various blocks of spectrum is allocated to downlink carrying data from the base station to the mobile telephone hand sets

b) TDD

- Time Division Duplexing, a 3GPP standardized version of Universal Mobile Telecommunications System networks.
- The designated mobile sends the data in a stipulated time and receives data from the BTS in another time
- The time is divided into various time slots and user sends data in few time slots and receives the data in the rest of the time slots
- Alternative downlink and uplink directions are used.