What is the key difference between FDD and TDD networks?

Question

Accepted Answer

FDD and TDD are two different duplexing techniques used in wireless communication networks.

FDD stands for Frequency Division Duplexing while TDD stands for Time Division Duplexing.
In FDD, separate frequency bands are used for uplink and downlink communication while in TDD, the same frequency band is used for both uplink and downlink communication.
FDD is commonly used in 3G and 4G networks while TDD is commonly used in 5G networks.
FDD provides better voice quality and is more suitable for applications that require constant data transfer while TDD is more suitable for applications that require bursty data transfer.
FDD requires more spectrum while TDD requires less spectrum.
FDD is more expensive to implement than TDD.
Examples of FDD networks include GSM, UMTS, and LTE while examples of TDD networks include WiMAX and TD-SCDMA.

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