Time Division Duplexing (TDD) is a wireless system architecture that uses the same carrier frequency for transmitting as well as receiving. This means that the TX (RF-DAC) and RX (RF-ADC) are not required to be active at the same time. The Zynq UltraScale+ RFSoC supports the following two modes to benefit from TDD applications:
- TDD power saving mode
- The RFSoC allows independent RF-ADC or RF-DAC channels to be powered down and wake up at any given moment, resulting in considerable system power savings.
- TDD RX/Obs sharing mode
- The RFSoC allows a sub-set of the RF-ADCs to be shared between the RX and Observation (Obs) modes in different time slots, two RF-ADC decimation states (data rates) are maintained with dynamic switching between them.
The following diagram shows how the RFSoC works in the TDD application.
Figure 1. RFSoC in TDD Mode