# Documentation

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# ltePUSCHIndices

PUSCH resource element indices

## Syntax

• ``````[ind,info] = ltePUSCHIndices(ue,chs)``````
• ``````[ind,info] = ltePUSCHIndices(ue,chs,opts)``````
example

## Description

``````[ind,info] = ltePUSCHIndices(ue,chs)``` returns a column vector of resource element indices given the UE-specific settings structure, `ue`, and channel transmission configuration, `chs`. It returns a column vector of Physical Uplink Shared Channel (PUSCH) resource element (RE) indices and a structure, `info`, containing information related to the PUSCH indices. By default, the indices are returned in 1-based linear indexing form that can directly index elements of a resource matrix. These indices are ordered as the PUSCH modulation symbols should be mapped. Alternative indexing formats can also be generated. Support of PUSCH frequency hopping is provided by the function `lteDCIResourceAllocation`, which creates `PRBSet` from a DCI Format 0 message. ```

example

``````[ind,info] = ltePUSCHIndices(ue,chs,opts)``` formats the returned indices using options defined in `opts`.```

## Examples

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Generate 0-based PUSCH resource element (RE) indices in linear form.

```frc = lteRMCUL('A1-1'); puschIndices = ltePUSCHIndices(frc,frc.PUSCH,{'0based','ind'}); puschIndices(1:4) ```
```ans = 4×1 uint32 column vector 0 1 2 3 ```

## Input Arguments

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UE-specific settings, specified as a structure having the following fields.

Parameter FieldRequired or OptionalValuesDescription
`NULRB`Required

Scalar integer from 6 to 110

Number of uplink resource blocks. (${N}_{\text{RB}}^{\text{UL}}$)

`CyclicPrefixUL`Optional

`'Normal'` (default), `'Extended'`

Cyclic prefix length.

`NTxAnts`Optional

1 (default), 2, 4

Number of transmission antennas.

`Shortened`Optional

0 (default), 1

Option to shorten the subframe by omitting the last symbol, specified as 0 or 1. If `1`, the last symbol of the subframe is not used. For subframes with possible SRS transmission, set `Shortened` to 1 to maintain a standard compliant configuration.

Data Types: `struct`

Channel transmission configuration, specified as a structure. It contains the following fields.

Parameter FieldRequired or OptionalValuesDescription
`PRBSet`Required

Integer column vector or two-column matrix

PRB indices, specified as a column vector or a 2-column matrix, containing the Physical Resource Block indices (PRBs) corresponding to the resource allocations for this PUSCH.

`Modulation`Optional

`'QPSK'`, `'16QAM'`, `'64QAM'`, or a cell array of these character vectors

Modulation format, specified as a character vector for one codeword or a cell array of one or more vectors for one or two codewords.

`NLayers`Optional

1 (default), 2, 3, 4

Number of transmission layers.

Data Types: `struct`

Output format options for resource element indices, specified as `'ind'` or `'sub'`, and `'1based'` or `'0based'`. You can specify a format for the indexing style and index base.

Category Options Description

Indexing style

`'ind'` (default)

The returned indices are in linear index style.

`'sub'`

The returned indices are in `[subcarrier,symbol,port]` subscript row style.

Index base

`'1based'` (default)

The returned indices are one-based.

`'0based'`

The returned indices are zero-based.

Example: `'sub'` returns indices in subscript row style using the default one-based indexing style.

Data Types: `char` | `cell`

## Output Arguments

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PUSCH resource element (RE) indices, returned as column vector of integers.

Data Types: `uint32`

Information related to the PUSCH indices, returned as a structure having the following fields.

Parameter FieldValuesDescription
`G`

1- or 2-element vector of integers

A one- or two-element vector, specifying the number of coded and rate matched UL-SCH data bits for each codeword

`Gd`Integer

Number of coded and rate matched UL-SCH data symbols, equal to the number of rows in the PUSCH indices

Data Types: `struct`