lteULDeprecode

SC-FDMA deprecoding

Syntax

out = lteULDeprecode(in,nrb)

out = lteULDeprecode(in,n,resourcetype)

Description

out = lteULDeprecode(in,nrb) performs SC-FDMA deprecoding of the complex modulation symbols in for PUSCH or NPUSCH configuration with a bandwidth of nrb resource blocks.

out = lteULDeprecode(in,n,resourcetype) performs SC-FDMA deprecoding of the complex modulation symbols in for PUSCH or NPUSCH configuration with a bandwidth of n resource blocks or subcarriers.

Examples

Deprecode Symbols After SC-FDMA Demodulation

Deprecode symbols after SC-FDMA demodulation and symbol extraction from the received resource grid.

Create an UL RMC configuration structure, resource grid, and bit stream.

rmc = lteRMCUL('A3-2');
[puschInd, info] = ltePUSCHIndices(rmc,rmc.PUSCH);
ueDim = lteULResourceGridSize(rmc);
bits = randi([0,1],info.G,rmc.PUSCH.NLayers);

Scramble bits, create modulated symbols, and perform UL precoding and resource mapping.

scrBits = lteULScramble(rmc,bits);
symbols = lteSymbolModulate(scrBits,rmc.PUSCH.Modulation);
precodedSymbols = lteULPrecode(symbols,rmc.NULRB);
grid = lteULResourceGrid(rmc);
grid(puschInd) = precodedSymbols;

Perform SC-FDMA modulation and demodulation.

[timeDomainSig,infoScfdma] = lteSCFDMAModulate(rmc,grid);
rxGrid = lteSCFDMADemodulate(rmc,timeDomainSig);

Extract PUSCH from grid and perform UL deprecoding.

rxPrecoded = rxGrid(puschInd);
dePrecodedSymbols = lteULDeprecode(rxPrecoded,rmc.NULRB);

Input Arguments

in — Complex modulation symbols

numeric matrix

Complex modulation symbols, specified as an N_Sym-by-N_L matrix of complex symbols. N_Sym is the number of symbols and N_L is the number of layers.

Data Types: double
Complex Number Support: Yes

nrb — Number of resource blocks

nonnegative integer

Number of resource blocks, specified as a nonnegative integer.

Data Types: double

n — Number of resource blocks or subcarriers

nonnegative integer

Number of resource blocks or subcarriers, specified as a nonnegative integer.

Dependencies

If the resourcetype is 'PRB', then n is the number of resource blocks. If the resourcetype is 'Subcarrier', then n is the number of subcarriers.

Data Types: double

resourcetype — Resource type

'PRB' | 'Subcarrier'

Resource type, specified as 'PRB' or 'Subcarrier'.

Data Types: char | string

Output Arguments

out — Deprecoded PUSCH output symbols

numeric matrix

Deprecoded PUSCH output symbols, returned as an N_Sym-by-N_L matrix of complex symbols. N_Sym is the number of symbols, and N_L is the number of layers.

The dimension and size of the input and output symbol matrices are the same.

Version History

Introduced in R2014a