Documentation

ltePUCCH1DRSIndices

PUCCH format 1 DRS resource element indices

Syntax

  • ind = ltePUCCH1DRSIndices(ue,chs)
    example
  • [ind,info] = ltePUCCH1DRSIndices(ue,chs)
    example
  • [___] = ltePUCCH1DRSIndices(ue,chs,opts)
    example

Description

example

ind = ltePUCCH1DRSIndices(ue,chs) returns a matrix of resource element indices for the demodulation reference signal (DRS) associated with PUCCH format 1 transmission given structures containing the UE-specific settings, and the channel transmission configuration settings.

example

[ind,info] = ltePUCCH1DRSIndices(ue,chs) also returns a PUCCH information structure array, info.

example

[___] = ltePUCCH1DRSIndices(ue,chs,opts) formats the returned indices using the option strings defined in a cell array, opts.

This syntax supports output options from prior syntaxes.

Examples

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Generate PUCCH Format 1 DM-RS Indices

Generate PUCCH format 1 DM-RS 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 1 DM-RS indices.

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

chs.ResourceIdx = 0;
chs.DeltaShift = 1;
chs.CyclicShifts = 0;
chs.ResourceSize = 0;

ind = ltePUCCH1DRSIndices(ue,chs);
ind(1:4)
ans =

         145
         146
         147
         148

Generate PUCCH Format 1 DM-RS Indices for Two Antennas

Generate the PUCCH format 1 DM-RS indices for two transmit antenna paths.

Initialize UE-specific and channel configuration structures. Generate PUCCH1 DRS indices and information outputs.

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

chs.ResourceIdx = [0 4];
chs.ResourceSize = 0;
chs.DeltaShift = 1;
chs.CyclicShifts = 0;

[ind,info] = ltePUCCH1DRSIndices(ue,chs);

Becasue there are two antennas, the DM-RS indices are output as a two-column vector, and the info output structure contains two elements. View ind and the size of info to confirm this.

ind(1:6,:)
size(info)
ans =

         145        1153
         146        1154
         147        1155
         148        1156
         149        1157
         150        1158


ans =

     1     2

View the contents of the two info structure elements.

info(1)
info(2)
ans = 

    PRBSet: [0 5]
     RBIdx: 0


ans = 

    PRBSet: [0 5]
     RBIdx: 0

Generate PUCCH Format 1 DM-RS Indices for Two Antennas Varying Indexing Style

Generate the PUCCH format 1 DM-RS 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 PUCCH1 DM-RS indices and information outputs.

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

chs.ResourceIdx = [0 4];
chs.ResourceSize = 0;
chs.DeltaShift = 1;
chs.CyclicShifts = 0;

opts = {'sub'};

[ind,info] = ltePUCCH1DRSIndices(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(70:74,:)
size(info)
ans =

   144     3


ans =

          70          12           1
          71          12           1
          72          12           1
           1           3           2
           2           3           2


ans =

     1     2

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

info(1)
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 these fields.

ResourceIdx — PUCCH resource indices0 (default) | optional | 0,...,2047 | integer | vector of integers

PUCCH resource indices, specified as an integer or a vector of integers. Values range from 0 to 2047. These indices determine the physical resource blocks, cyclic shift and orthogonal cover used for transmission. (nPUCCH(1)). Define one index for each transmission antenna.

ResourceSize — Size of resources allocated to PUCCH format 20 (default) | optional | 0,...,98 | integer

Size of resources allocated to PUCCH format 2, specified as an integer from 0 to 98. This parameter affects the location of this transmission. (NRB(2))

DeltaShift — Delta shift1 (default) | optional | 2 | 3

Delta shift, specified as 1, 2, or 3. (Δshift)

CyclicShifts — Number of cyclic shifts used for format 10 (default) | optional | 0,...,7 | integer

Number of cyclic shifts used for format 1 in resource blocks (RBs) with a mixture of format 1 and format 2 PUCCH, specified as an integer from 0 to 7. (Ncs(1))

Data Types: struct

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 — Resource element indicesinteger column vector | three-column integer matrix

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 1 DRS modulation symbol mapping. 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: [145,146,147,...]

info — PUCCH format 1 DRS informationstructure array

PUCCH format 1 DRS information, returned as a structure array with elements corresponding to each transmit antenna and containing these fields.

PRBSet — Indices occupied by PRB in each slot of subframenonnegative integer vector

Indices occupied by PRB in each slot of the subframe, returned as a nonnegative integer vector. The 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)

Data Types: struct

Introduced in R2014a

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