TDD and FDD comparison

TDD, downlink and uplink traffic use the same channel and separated by time space

• Suitable for unclassified rical services, such as Internet Data Services
• Lower Speed support, e.g. up to 120 km/h, because TDD chip processing speed cannot keep up
• TDD base stations have lower costs than FDD. One of the important reasons is that in TDD, upstream and downstream data share the same frequency, which is more suitable for smart antennas, reduced loss, and increased efficiency.

FDD, downlink and uplink traffic use separate channels

• It is suitable for wide rical services, but for unclassified rical services, the spectrum utilization is greatly reduced.
• Higher speed support, e.g. up to 500 km/h
• Anti-interference performance is better than TDD