Documentation

ltePUCCH2Indices

PUCCH format 2 resource element indices

Syntax

  • ind = ltePUCCH2Indices(ue,chs)
    example
  • [ind,info] = ltePUCCH2Indices(ue,chs)
    example
  • [___] = ltePUCCH2Indices(ue,chs,opts)
    example

Description

example

ind = ltePUCCH2Indices(ue,chs) returns a matrix of resource element indices for the Physical Uplink Control Channel (PUCCH) Format 2 transmission given structures containing the UE-specific settings, and the channel transmission configuration.

example

[ind,info] = ltePUCCH2Indices(ue,chs) also returns a PUCCH information structure array info.

example

[___] = ltePUCCH2Indices(ue,chs,opts) formats the returned indices using option strings defined in the cell array, opts.

This syntax supports output options from prior syntaxes.

Examples

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Generate PUCCH Format 2 Indices

Generate PUCCH format 2 RE indices for a 1.4 MHz bandwidth and PUCCH resource index 0. Use default values for all other parameters.

Initialize UE-specific and channel configuration structures. Generate PUCCH format 2 indices.

ue.NULRB = 6;
ue.CyclicPrefixUL = 'Normal';

chs.ResourceIdx = 0;

ind = ltePUCCH2Indices(ue,chs);
ind(1:4)
ans =

           1
           2
           3
           4

Generate PUCCH Format 2 Indices for Three Antennas

Generate the physical uplink control channel (PUCCH) format 2 indices for three transmit antenna paths, and display the information structure output.

Initialize UE-specific and channel configuration structures. Generate PUCCH 2 indices and information outputs.

ue.NULRB = 6;
ue.CyclicPrefixUL = 'Normal';

chs.ResourceIdx = [0 129 2];

[ind,info] = ltePUCCH2Indices(ue,chs);

Because there are three antennas, the indices are output as a three column vector and the info output structure contains three elements. View ind and the size of info to confirm this.

ind(1:5,:)
size(info)
ans =

           1        1069        2017
           2        1070        2018
           3        1071        2019
           4        1072        2020
           5        1073        2021


ans =

     1     3

View the contents of one of the info structure elements.

info(1)
ans = 

    PRBSet: [0 5]
     RBIdx: 0

Generate PUCCH Format 2 Indices Varying Indexing Style

Generate the PUCCH format 2 indices for two transmit antenna paths, and output in subscript indexing form.

Initialize UE-specific and channel configuration structures, and the indexing option parameter. Generate PUCCH 2 indices and information outputs.

ue.NULRB = 6;
ue.CyclicPrefixUL = 'Normal';

chs.ResourceIdx = [0 4];

opts = {'sub'};

[ind,info] = ltePUCCH2Indices(ue,chs,opts);

Using 'sub' indexing style, the indices are output in [subcarrier, symbol, antenna] subscript form. View the midpoint of ind and observe the antenna index change.

size(ind)
ind(118:123,:)
ans =

   240     3


ans =

          70          14           1
          71          14           1
          72          14           1
           1           1           2
           2           1           2
           3           1           2

Because there are two antennas, the info output structure contains two elements. View the contents of one of the info structure elements.

size(info)
info(2)
ans =

     1     2


ans = 

    PRBSet: [0 5]
     RBIdx: 0

Input Arguments

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ue — UE-specific settingsstructure

UE-specific settings, specified as a structure containing these fields.

NULRB — Number of uplink resource blocksnonnegative integer

Number of uplink resource blocks, specified as a nonnegative integer.

CyclicPrefixUL — Cyclic prefix length for uplink channels'Normal' (default) | optional | 'Extended'

Cyclic prefix length for uplink channels, specified as 'Normal' or 'Extended'.

Data Types: char

chs — Channel transmission configurationstructure

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

ResourceIdx — PUCCH resource indices0 (default) | optional | 0,...,1185 | integer | vector of integers

PUCCH resource indices, specified as an integer or a vector of integers. Values range from 0 to 1185. There is one index for each transmission antenna. These indices determine the cyclic shift and orthogonal cover used for transmission. (nPUCCH(2))

opts — Output format options for element resource indices{'ind', '1based'} (default) | optional | string | cell array of strings

Output format options for element resource indices, specified as a string or a cell array of strings. 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 form.

'sub'

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

Index base

'1based' (default)

Indices returned are one-based.

'0based'

Indices returned are zero-based.

Example: {'sub','0based'} returns zero-based indices in subscript row form.

Output Arguments

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ind — PUCCH format 2resource element indicesinteger column vector | three-column integer matrix

PUCCH format 2 resource element indices, returned as an integer column vector or a three-column integer matrix. By default, the indices are returned in one-based linear indexing form that can directly index elements of a resource matrix. These indices are ordered according to PUCCH format 2 modulation symbol mapping as specified in TS 36.211 [1], Section 5.4. The opts input offers alternative indexing formats. The indices for each antenna are in the columns of ind, with the number of columns determined by the number of PUCCH resource indices specified in chs.ResourceIdx.

Example: [1,2,3,4...]

info — PUCCH format 2 informationstructure array

PUCCH format 2 information, returned as a structure array with elements corresponding to each transmit antenna and containing these fields.

PRBSet — Set of PRB indicescolumn vector | two-column matrix

Set of PRB indices, returned as a column vector or two-column matrix corresponding to the resource allocations.

  • When returned as a column vector, the resource allocation is the same in both slots of the subframe.

  • When returned as a two-column matrix, the resource allocations can vary for each slot in the subframe.

The PRB indices are zero-based.

Example: [0,5]

RBIdx — PUCCH logical resource block indexnonnegative integer

PUCCH logical resource block index, returned as a nonnegative integer. (m)

References

[1] 3GPP TS 36.211. "Physical Channels and Modulation." 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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