Duplex Mode (LTE)

Default: FDD Frequency Division Duplex: A duplex scheme in which uplink and downlink transmissions use different frequencies but are typically simultaneous.

Range: FDD, TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the remainder of the frame period.

Duplex Mode configures the demodulator to demodulate either FDD (frame type 1) or TDD (frame type 2) signals.

The FDD selection is enabled by Opt. BHD, and the TDD selection is enabled by Opt. BHE. Duplex modes that are not licensed will be grayed out and not selectable.

There are some differences in the LTE Demod Properties dialog when TDD is selected. See the following topics for more information:

The Format tab will show two parameters specific to TDD mode: Dw/GP/Up Len and UL/DL Config.
The Advanced tab contains several TDD-only parameters.
Downlink Control Channel Properties (PDCCH Allocations, Mi Definition)
LTE Allocation Editor (TDD-only parameters: Multi-Frame Analysis, Show Mapping, Frame Index, SRSMaxUpPTS, SRS NraS1, SRS NraS6, PRACH Physical Random Access Channel Sync Resource)