Modeling Basics

Resource grids, resource extraction, FDD and TDD duplexing modes, parameter structures

LTE Toolbox™ functions create valid 3GPP parameter sets and model LTE physical layer processing. The parameter configuration functions create and initialize parameter structures that align with specified 3GPP reference measurement channel (RMC), fixed reference channel (FRC), or E-UTRA test model (E-TM) settings. Use the parameter structures as inputs to waveform generation functions to create waveforms compliant with 3GPP LTE and UMTS standards.

Functions

`lteResourceGrid`	Subframe resource array
`lteResourceGridSize`	Size of subframe resource array
`lteDLResourceGrid`	Downlink subframe resource array
`lteDLResourceGridSize`	Size of downlink subframe resource array
`lteULResourceGrid`	Uplink subframe resource array
`lteULResourceGridSize`	Uplink subframe resource array size
`lteSLResourceGrid`	Sidelink subframe resource array
`lteSLResourceGridSize`	Sidelink subframe resource array size
`lteNBResourceGrid`	Narrowband resource array (Since R2021a)
`lteDuplexingInfo`	Duplexing information
`lteExtractResources`	Extract resource elements

Topics

Reference Guides

Downlink Physical Signals Grid
Grid view of the downlink physical signals and associated LTE Toolbox functions.
Downlink Physical Channels Grid
Grid view of the downlink physical channels and associated functions in the LTE Toolbox.
Uplink Physical Channels and Signals Grid
Grid view of the uplink physical channels and physical signals and associated functions in the LTE Toolbox.

Resource Grids

Create an Empty Resource Grid
This example shows how to create an empty resource grid of the right dimensions for the cell-wide settings specified in structure enb.
Map Reference Signal to Resource Grid
This example shows how to map the cell specific reference signals to the resource grid for a subframe in the two antenna case.
Resource Grid Indexing
LTE Toolbox provides facilities to generate sequences of symbols corresponding to the physical channels and signals.

Duplexing

FDD and TDD Duplexing
Describes frequency and time division duplexing (LTE frame structure type 1 and 2) and representation in the LTE Toolbox product.

Parameter Structures

Parameterization
Describes the function parameter style, the way parameters are passed to the toolbox functions. Some of the functions in the LTE Toolbox require a large number of parameters. To simplify this process and to group together relevant parameters, structures are used.
LTE Parameterization for Waveform Generation and Simulation
This example shows how to parameterize end-to-end simulations and generate static waveforms by using LTE Toolbox™ software.
UL-SCH Parameterization
Describes parameterization forms for the UL-SCH and PUSCH related functions.

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.

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LTE Waveform Modeling Using Downlink Transport and Physical Channels

Generate a time domain waveform containing a Physical Downlink Shared Channel (PDSCH), corresponding Physical Downlink Control Channel (PDCCH) transmission and the Physical Control Format Indicator Channel (PCFICH), for one subframe.

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PDSCH Transmit Diversity Throughput Simulation

Demonstrates how to measure the Physical Downlink Shared Channel (PDSCH) throughput of a transmit/receive chain using the LTE Toolbox™.

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PDSCH Port 5 UE-Specific Beamforming

Demonstrates release 8 port 5 UE-specific beamforming with the LTE Toolbox™.

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Release 10 PDSCH Enhanced UE-Specific Beamforming

Demonstrates the Release 10 UE-specific beamforming capability of the LTE Toolbox™ and shows how an appropriate choice of beamforming matrix leads to better performance.

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LTE DL-SCH and PDSCH Processing Chain

In LTE the Downlink Shared Channel (DL-SCH) is a transport channel used for the transmission of user data, dedicated control and user-specific higher layer information and downlink system information. The Physical Downlink Shared Channel (PDSCH) is the physical channel that carries the DL-SCH coded data. This example shows the different stages involved in the Downlink Shared Channel (DL-SCH) and Physical Downlink Shared Channel (PDSCH) processing and provides access to the data from these intermediate stages.

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Modeling and Testing an LTE RF Receiver

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

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LTE Downlink Channel Estimation and Equalization

Use the LTE Toolbox™ to create a frame worth of data, pass it through a fading channel and perform channel estimation and equalization. Two figures are created illustrating the received and equalized frame.

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