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LTE Test Model Generator

Generate LTE downlink test model (E-TM) waveforms

Description

The LTE Test Model Generator app generates preset E-UTRA test model (E-TM) waveforms. TS 36.141 [1], Section 6.1, specifies E-TMs for UE performance testing.

User Interface Settings

In the LTE Downlink E-TM Generator user interface, you can set these parameters:

Parameter (Equivalent Field)ValuesDescription
Test model (TMN)

'1.1', '1.2', '2', '2a', '3.1', '3.1a', '3.2', '3.3'

Test model number, as specified in TS 36.141, identifying the test model to use when generating the waveform

Bandwidth (BW)

'1.4MHz', '3MHz', '5MHz', '10MHz', '15MHz', '20MHz', '9RB', '11RB', '27RB', '45RB', '64RB', '91RB',

Channel bandwidth to use when generating test model waveforms

Cell identity (NCellID)

Integer from 0 to 503

Physical layer cell identity

Duplex mode (DuplexMode)

'FDD' (default), 'TDD'

Duplexing mode, specified as:

  • 'FDD' for Frequency Division Duplex or

  • 'TDD' for Time Division Duplex

Number of subframes (TotSubframes)

Nonnegative scalar integer

Total number of subframes to generate

Windowing (samples) (Windowing)

Nonnegative scalar integer

Number of time-domain samples over which windowing and overlapping of OFDM symbols is applied

Waveform output variable

Variable name, beginning with an alphabetical character and containing alphanumeric characters

Waveform output variable name. When you click Generate waveform, a new variable with this name is created in the MATLAB® workspace.

Resource grid output variable

Variable name, beginning with an alphabetical character and containing alphanumeric characters

Resource grid output variable name. When you click Generate waveform, a new variable with this name is created in the MATLAB workspace.

E-TM configuration output variable

Variable name, beginning with an alphabetical character and containing alphanumeric characters

E-TM configuration output parameter structure name. When you click Generate waveform, a new variable with this name is created in the MATLAB workspace.

The fields of this output configuration structure are initialized in accordance with the test models defined in TS 36.141 [1], Section 6.1.

Open the LTE Test Model Generator App

  • MATLAB Toolstrip: On the Apps tab, under Signal Processing and Communications, click the LTE Test Model Generator app icon.

  • MATLAB command prompt: Enter lteTestModelGenerator or lteTestModelTool.

Examples

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Use the LTE Test Model Generator app to generate a time-domain signal and a 3-D array of the resource elements for the E-TM 3.2, as specified in TS 36.141.

Open the LTE Test Model Generator app.

Adjust default runtime parameter settings:

  • Set Test model to 3.2.

  • Set Bandwidth to 15MHz.

Specify output variable names:

  • For Waveform output variable, enter waveform.

  • For Resource grid output variable, enter grid.

  • For E-TM configuration output variable, enter tmCfg.

The user interface entries should now match these:

Click Generate waveform and waveform, grid, and tmCfg variables now appear in the MATLAB Workspace browser.

Programmatic Use

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See the lteTestModelTool function reference page for a description of the programmatic syntaxes supported.

References

[1] 3GPP TS 36.141. “Base Station (BS) conformance testing.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA). URL: http://www.3gpp.org.

Introduced in R2014a

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