Real Time

Transport Channel (Basic LTE-A FDD Downlink)

The type of transport channel selected determines the displayed parameters. In the example shown, the DL-SCH channel is selected, so only DL-SCH parameters are displayed. Parameters for all transport channel types are described below the graphic.

Click Transport Channel in the tree view to open the Transport Channel node.

For a general description of downlink signal generation on a transport channel, see Downlink Transport Channels.

Transport Channel

Transport Channel Number

Name

State

Power

Physical Channels

Coding State

Data

RNTI

UE-Specific Reference Signals

DM-RS State

DM-RS Power

DM-RS Antenna Configuration

DM-RS Antenna Port

Scramble ID  

Transport Channel Number

Displays the number of the selected transport channel.

Before adding a transport channel as described below, delete any existing transport channel, physical channel, or resource block collection that occupies the resource blocks that your new transport channel will occupy. If you add a new transport channel without first deleting a conflicting channel or resource block collection, a "code conflicted" error occurs when you generate the waveform.

To add a new transport channel, click the Add Channel button and select the transport channel type (DL-SCH or BCH) to add. The software adds the new channel above the currently selected channel in the list. The software assigns a channel identifying number to the new channel that corresponds to its position in the list and increments the identifying numbers of subsequent channels in the list. Similarly, if you delete the selected channel using the Delete Channel(s) button , the software adjusts the identifying numbers of the subsequent channels according to their new positions in the list.

If you select DL-SCH as the type of transport channel to add, the Configure DL-SCH window opens that enables you to configure the downlink shared channel. You can make changes to an already configured DL-SCH channel by selecting the channel and clicking the Edit DL-SCH Configuration button . This button opens the Configure DL-SCH window for the selected channel.

Name

Displays the name of the selected transport channel.

BCH = Broadcast Channel

DL-SCH = Downlink Shared Channel

State

Choice: Off | On

Default: On

Double-click or use the drop-down menu to turn the channel On or Off.

Power

Range: -60 to 20 dB 

Default: 0.000 dB

Enter a power level in dB for the selected channel. See Power Settings (Downlink) for a description of how the software applies your power setting.

Physical Channels

Displays the number(s) of the physical channel(s) occupied by the selected transport channel.

Coding State

Displays the coding state (Off) for the selected channel. Transport channel coding is not available in the Basic LTE Downlink carrier. Use the Advanced LTE Downlink carrier to configure a signal with transport channel coding.

Data

Use the Data Source Selection dialog box to select PN9, PN15,or User Defined Bits to use for the data.

RNTI

Range: 0 to 65535 (=0xFFFF)

Default: 0

Enter a decimal value for the Radio Network Temporary Identifier (RNTI).

See 3GPP TS 36.211.

UE Specific Reference Signals (DM-RS)

UE specific reference signals are intended for a specific user and are used for channel estimation and demodulation.

DM-RS State

Choice: On | Off

Default: Off

Double-click or use the drop-down menu to turn the channel state on or off.

DM-RS State is coupled to the DL-SCH State. When DL-SCH is On, DM-RS State is active and is settable.

DM-RS Power

Range: -60 to 20 dB

Default: 0 dB

Enter a power level in dB for the selected channel. See Power Settings (Downlink) for a description of how the software applies your power setting.

DM-RS Antenna Configuration

Choice: Auto | Manual

Default: Auto

Double-click or use the drop-down menu to select the DM-RS Antenna Configuration.

This parameter indicates the setting of the DM-RS Antenna Port  setting. The possible settings are either Auto (automatically set by the software) or Manual (you can set them).

DM-RS Antenna Port

Choice: Port 5 | Port 7 | Port 8 | Port 9 | Port 10 | Port 11 | Port 12 | Port 13 | Port 14

Default: Port 5

Double-click or use the drop-down menu to select the virtual antenna port for UE-Specific Reference Signal (DM-RS) transmission.

For extended cyclic prefix, UE-specific reference signals are not supported on antenna ports 9 to 14.

 

Total Number of Antennas

DM-RS Antenna Configuration

DM-RS Antenna Port

 

1

Manual

Port 5, 7, 8

 

2

Manual

Port 7, 8

 

4

Manual

Port 7, 8, 9, 10

 

8

Manual

Port 7, 8, 9, 10, 11,12,13, 14

 

 

Auto

(Antenna Port) + 7

Scramble ID

Range: 0 to 1

Default: 0

Enter a value of the Scramble ID for UE-specific Reference Signals. This parameter indicates the Scramble ID for UE-specific RS.

This is only available when DM-RS Antenna Port = Port 7 or Port 8 and Total Number of Antennas = 2 Antennas, 4 Antennas, or 8 Antennas.

For more detail, refer to 3GPP TS 36.211.