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Resource elements extraction

```
[re,reind]
= lteExtractResources(ind,grid)
```

```
[re1, re2,...,reN,reind1, reind2,
...,reindN]= lteExtractResources(ind,grid1,grid2,
....,gridN)
```

`re = lteExtractResources(....,opts)`

`[`

returns
resource elements `re`

,`reind`

]
= lteExtractResources(`ind`

,`grid`

)`re`

and indices of the extracted
resource elements `reind`

from a resource array, `grid`

,
using resource elements indices `ind`

. You can extract
resource elements from a resource grid with different dimensionality
than the resource grid addressed by the indices. The indices specified
and returned are in 1–based linear indexing form. Other indexing
options are available. The resource extraction process is further
explained in Algorithms.

In LTE System Toolbox™, indices are generated for mapping
sequences of physical channel and signal symbols to a resource grid.
These indices are generated using channel-or signal-specific functions
and address resource elements in an array sized, *M*-by-*N*-by-*P*. *M* is
the number of subcarriers, *N* is the number of OFDM
or SC-FDMA symbols and *P* is the number of planes.
The diagram highlights the resource elements of a resource grid addressed
by indices, `ind`

. The indices are in a 1–based
linear indexing form. *P = 2* is the number of antenna
ports.

Typically the resource array extracts resource elements from one of the following:

A 3-D received grid, sized

*M*-by-*N*-by-*NRxAnts*.*NRxAnts*is the number of receive antennas. This grid is created after OFDM or SC-FDMA demodulation.A 4-D channel estimation grid, sized

*M*-by-*N*-by-*NRxAnts*-by-*P*. This grid is created by channel estimation functions (refer Channel Estimation).

You can describe the size of the 3D received grid as a 4D grid that has a trailing singleton dimension.

`[`

extracts resource elements
from multiple resource arrays using the indices `re1`

, `re2`

,...,`reN`

,`reind1`

, `reind2`

,
...,`reindN`

]= lteExtractResources(`ind`

,`grid1`

,`grid2`

,
....,`gridN`

)`ind`

.

`lteCellRSIndices`

| `lteDLChannelEstimate`

| `lteDLResourceGrid`

| `lteOFDMDemodulate`

| `ltePBCHDecode`

| `ltePBCHIndices`

| `ltePCFICHDecode`

| `ltePCFICHIndices`

| `ltePDCCHDecode`

| `ltePDCCHDecode`

| `ltePDCCHIndices`

| `ltePDCCHIndices`

| `ltePDSCHDecode`

| `ltePDSCHIndices`

| `ltePHICHDecode`

| `ltePHICHIndices`

| `ltePUCCH1Decode`

| `ltePUCCH1Indices`

| `ltePUCCH2Decode`

| `ltePUCCH2Indices`

| `ltePUCCH3Decode`

| `ltePUCCH3Indices`

| `ltePUSCHDecode`

| `ltePUSCHIndices`

| `lteSCFDMADemodulate`

| `lteULChannelEstimate`

| `lteULChannelEstimatePUCCH1`

| `lteULChannelEstimatePUCCH2`

| `lteULChannelEstimatePUCCH3`

| `lteULResourceGrid`

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