Frequency Division Duplex

The duplex separation of downlink (DL) and uplink (UL) is typically done either by using FDD or by using TDD.

Air interface standards using FDD are, for example, LTE FDD or UMTS FDD. To specify the FDD configuration of various air interfaces, click Project > Edit Project Parameter.... Select the Air Interface tab and under Duplex Separation, click Settings.

Figure 1. The Duplex Properties FDD dialog.
Duplex Separation
Duplex separation between downlink and uplink channel in frequency duplex mode.