Test and Measurement

Describes waveform generation, visualization, and transmitter performance analysis

LTE Toolbox™ provides functions that let you measure transmitter performance characteristics. The examples featured here demonstrate transmitter modeling and performance analysis. Communications Toolbox™ and DSP System Toolbox™ System objects provide additional quantitative tools for measuring system performance, and graphical utilities for visualizing waveforms.

Apps

LTE Waveform Generator	Create, impair, visualize, and export LTE waveforms
LTE Throughput Analyzer	Generate throughput curves for physical downlink shared channel (PDSCH) conformance test analysis

Blocks

Waveform From Wireless Waveform Generator App

Wireless waveform source exported to Simulink (Since R2021b)

Functions

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Measurement Channel Configuration

`lteRMCDL`	Downlink reference measurement channel configuration
`lteRMCUL`	Uplink reference measurement channel or FRC configuration
`lteTestModel`	Downlink test model configuration structure

Waveform Generation

`lteRMCDLTool`	Generate downlink RMC waveform
`lteRMCULTool`	Uplink RMC or FRC waveform generation
`lteTestModelTool`	Generate downlink test model waveform

Measurements

lteEVM Error vector magnitude calculation

Objects

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Visualization

`comm.ConstellationDiagram`	Display and analyze input signals in IQ-plane
`spectrumAnalyzer`	Display frequency spectrum of time-domain signals (Since R2022a)
`timescope`	Display time-domain signals (Since R2020a)
`dsp.ArrayPlot`	Display vectors or arrays

Measurements

`comm.ErrorRate`	Compute bit or symbol error rate of input data
`comm.EVM`	Measure error vector magnitude (EVM) of received signal

Topics

Generate a Test Model
The LTE specifications define conformance test models for transmitter tests.
Generate Wireless Waveform in Simulink Using App-Generated Block
This example shows how to configure and use the block that is generated using the Export to Simulink capability that is available in the Wireless Waveform Generator app.

Featured Examples

LTE Parameterization for Waveform Generation and Simulation

Parameterize end-to-end simulations and generate static waveforms by using LTE Toolbox™ software. This example focuses on downlink transmissions, but the concepts discussed also apply to uplink transmissions.

Open Script

LTE Downlink Test Model (E-TM) Waveform Generation

Generate a test model using LTE Toolbox™.

Open Script

LTE Uplink EVM and In-Band Emissions Measurements

How the LTE Toolbox™ can be used to perform Error Vector Magnitude (EVM) and in-band emissions measurements on an uplink signal as per TS 36.101 Annex F [ 1 ].

Open Script

LTE Downlink Adjacent Channel Leakage Power Ratio (ACLR) Measurement

How the Adjacent Channel Leakage Power Ratio (ACLR) can be measured within a downlink Reference Measurement Channel (RMC) signal using the LTE Toolbox™.

Open Script

PDSCH Error Vector Magnitude (EVM) Measurement

Measures the EVM within a downlink reference measurement channel (RMC) signal and a downlink test model (E-TM) signal, according to the EVM measurement requirements specified in TS 36.104, Annex E [ 1 ].

Open Script

Waveform Acquisition and Analysis using LTE Toolbox with Test and Measurement Equipment

How an over-the-air LTE waveform can be captured and analyzed using the LTE Toolbox™, the Instrument Control Toolbox™ and RF signal analyzer hardware.

Open Script

LTE Uplink EVM and In-Band Emissions Measurements

How the LTE Toolbox™ can be used to perform Error Vector Magnitude (EVM) and in-band emissions measurements on an uplink signal as per TS 36.101 Annex F [ 1 ].

Open Script

Modeling and Testing an LTE RF Transmitter

Characterize the impact of radio frequency (RF) impairments, such as in-phase and quadrature (IQ) imbalance, phase noise, and power amplifier (PA) nonlinearities, on the performance of an LTE transmitter. The example generates the baseband LTE waveform, which consists of an E-UTRA test model (E-TM), by using LTE Toolbox™ software and models the RF transmitter by using RF Blockset™ software.

Open Model

Modeling and Testing an LTE RF Receiver

Demonstrates how to model and test an LTE RF receiver using LTE Toolbox™ and RF Blockset™.

Open Script

LTE Sidelink Resource Pools and PSCCH Period

How sidelink direct communication resource pools and PSCCH periods are defined and parameterized. It shows the relationship between the semi-static RRC pool parameters and the PSCCH period structure. It also shows how the dynamic scheduling parameters (DCI and SCI) for transmission mode 1 and mode 2 affect the final transmission resource selection.

Open Script

NB-IoT Downlink Waveform Generation

Generate LTE-Advanced Pro Release 13 narrowband IoT (NB-IoT) waveforms for test and measurement applications using LTE Toolbox™ software.

Open Script

NB-IoT Uplink Waveform Generation

Generate LTE-Advanced Pro Release 13 Narrowband IoT (NB-IoT) uplink waveforms consisting of the Narrowband Physical Uplink Shared Channel (NPUSCH) and the associated demodulation reference signals for test and measurement applications using the LTE Toolbox™.

Open Script

NB-IoT Downlink In-Band and Guardband Waveform Generation and Analysis

Generate a narrowband internet of things (NB-IoT) downlink waveform for in-band and guardband operation modes on an LTE carrier by using the LTE Toolbox™. The example also shows an analysis of the quality of the recovered NB-IoT physical downlink shared channel (NPDSCH) through error vector magnitude (EVM) measurements.

Open Live Script

Release 12 Downlink Carrier Aggregation Waveform Generation, Demodulation and Analysis

How multiple downlink carriers can be generated, aggregated and further demodulated using the LTE Toolbox™.

Open Script

Uplink Carrier Aggregation Waveform Generation, Demodulation, and Analysis

How multiple uplink carriers can be generated, aggregated, and demodulated using LTE Toolbox™. Error Vector Magnitude (EVM) and in-band emissions are measured for the demodulated carrier as per TS 36.101 Annex F [ 1 ].

Open Script

Dynamic Spectrum Sharing for 5G NR and LTE Coexistence

Generate coexisting LTE and 5G NR waveforms for dynamic spectrum sharing.

Open Live Script

Waveform Generation and Transmission Using LTE Toolbox with Test and Measurement Equipment

Generate and analyze an over-the-air LTE waveform by using the LTE Toolbox™, the Instrument Control Toolbox™ and a Keysight Technologies® RF signal generator and analyzer.

Open Script

Reference Signal Measurements (RSRP, RSSI, RSRQ) for Cell Reselection

In the LTE system, a UE must detect and monitor the presence of multiple cells and perform cell reselection to ensure that it is "camped" on the most suitable cell. A UE "camped" on a particular cell will monitor the System Information and Paging of that cell, but it must continue to monitor the quality and strength of other cells to determine if cell reselection is required.

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