lteULSCHDeinterleave

UL-SCH deinterleaving

Syntax

[cdata,ccqi,cri,cack]
= lteULSCHDeinterleave(ue,chs,in)

Description

[cdata,ccqi,cri,cack] = lteULSCHDeinterleave(ue,chs,in) returns the deinterleaved data vector cdata, encoded UCI vectors, ccqi,cri, and cack, or cell array of vectors, after performing the demultiplexing and UL-SCH channel deinterleaving to undo the processing described in TS 36.212, Sections 5.2.2.7 and 5.2.2.8 [1] for UE-specific settings, ue, and UL-SCH channel specific configuration, chs.

The function expects the input in to be multiplexed and interleaved as per defined in TS 36.212, Sections 5.2.2.7 and 5.2.2.8 [1]. This input can be a vector or a cell array of vectors, deinterleaved and demultiplexed separately, and the outputs are of the same form. The size of the coded CQI symbols and codeword number with it is multiplexed, to correctly perform the demultiplexing, are deduced using the channel specific structure chs via the Modulation and QdCQI parameters. The presence or absence of ccqi in the transmission is signaled via QdCQI parameter with nonzero (number of coded CQI symbols) or zero value, respectively.

Multiple codewords can be parameterized by two different forms of the chs structure. Each codeword can be defined by separate elements of a 1-by-2 structure array, or the codeword parameters can be combined together in the fields of a single scalar, or 1-by-1, structure. Any scalar field values apply to both codewords and a scalar NLayers is the total number. See UL-SCH Parameterization for more details.

example

Examples

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Interleave and Deinterleave UL-SCH

Open Live Script

Perform back-to-back interleaving and deinterleaving of a vector of interleaver input bit indices.

Create UE-specific and propagation channel configuration structures.

ue.CyclicPrefixUL = 'Normal';
ue.Shortened = 0;
chs.Modulation = 'QPSK';
chs.NLayers = 1;
chs.QdCQI = 0;
chs.QdRI = 0;
chs.QdACK = 0;

There are 288 PUSCH QPSK symbols in two RBs and two bits per symbol for QPSK.

cdata = randi([0 1],2*288,1);
size(cdata)

ans = 1×2

   576     1

interleaved = lteULSCHInterleave(ue,chs,cdata);
deinterleaved = lteULSCHDeinterleave(ue,chs,interleaved);
size(deinterleaved)

ans = 1×2

   576     1

The deinterleaved output is the same size as the data prior to interleaving.

Input Arguments

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`ue` — UE-specific settings
structure

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

`CyclicPrefixUL` — Cyclic prefix length
`'Normal'` (default) | optional | `'Extended'`

Cyclic prefix length, specified as 'Normal' or 'Extended'.

Data Types: char | string

`Shortened` — Shorten subframe flag
0 (default) | optional | 1

Shorten subframe flag, specified as 0 or 1. Optional. If 1, the last symbol of the subframe is not used. It should be set if the current subframe contains a possible SRS transmission.

Data Types: logical | double

Data Types: struct

`chs` — UL-SCH related parameters
structure

UL-SCH related parameters, specified as a structure with the following fields.

`Modulation` — Modulation format
`'QPSK'` | `'16QAM'` | `'64QAM'` | `'256QAM'` | cell array of character vectors | string array

Modulation format, specified as 'QPSK', '16QAM', '64QAM', or '256QAM'. Use double quotes for string. It there are two blocks, use a cell array of character vectors or a string array.

Data Types: char | string

`NLayers` — Number of transmission layers
1 (default) | optional | 2 | 3 | 4

Number of transmission layers, total or per codeword, specified as a positive scalar integer. Optional.

Data Types: double

`QdCQI` — Number of coded symbols for CQI
0 (default) | optional | nonnegative scalar integer

Number of coded symbols for CQI, specified as a nonnegative scalar integer. Optional. (Q'_CQI)

Data Types: double

`QdRI` — Number of coded symbols for RI
0 (default) | optional | nonnegative scalar integer

Number of coded symbols for RI, specified as a nonnegative scalar integer. Optional. (Q'_RI)

Data Types: double

`QdACK` — Number of coded symbols for ACK/NACK
0 (default) | optional | nonnegative scalar integer

Number of coded symbols for ACK/NACK, specified as a nonnegative scalar integer. Optional. (Q'_ACK)

Data Types: double

Data Types: struct