nrPUSCH

Generate PUSCH modulation symbols

Description

example

sym = nrPUSCH(cw,mod,nLayers,nid,rnti) returns physical uplink shared channel (PUSCH) modulation symbols, as defined in TS 38.211 Sections 6.3.1.1 to 6.3.1.5 [1]. The process consists of scrambling with scrambling identity nid, performing symbol modulation with modulation scheme mod, and layer mapping. cw specifies an uplink shared channel (UL-SCH) codeword, as described in TS 38.212 Section 6.2.7 [2]. nLayers specifies the number of transmission layers. rnti is the radio network temporary identifier (RNTI) of the user equipment (UE).

sym = nrPUSCH(___,transformPrecode,mrb) specifies transform precoding as a logical value in addition to the input arguments in the first syntax. When transformPrecode is set to true, the function applies the transform precoding defined in TS 38.211 Section 6.3.1.4. mrb specifies the allocated number of PUSCH resource blocks.

example

sym = nrPUSCH(___,txScheme,nPorts,tpmi) specifies the transmission scheme in addition to the input arguments in the second syntax. When txScheme is set to 'codebook', the function performs multi-input multi-output (MIMO) precoding based on the specified number of layers nLayers, number of antenna ports nPorts, and the transmitted precoding matrix indicator (TPMI) tpmi.

sym = nrPUSCH(___,'OutputDataType',datatype) specifies the PUSCH symbol data type in addition to the input arguments in any of the previous syntaxes.

Examples

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Specify a random sequence of binary values corresponding to a codeword of 8064 bits.

cw = randi([0 1],8064,1);

Using 16-QAM modulation, generate PUSCH modulation symbols for the specified physical layer cell identity number, RNTI, and two transmission layers. By default, the function disables transform precoding and noncodebook-based transmission.

modulation = '16QAM';
nlayers = 2;
ncellid = 17;
rnti = 111;
sym = nrPUSCH(cw,modulation,nlayers,ncellid,rnti)
sym = 1008×2 complex

  -0.9487 - 0.9487i  -0.3162 + 0.3162i
   0.3162 + 0.3162i  -0.9487 - 0.3162i
   0.3162 + 0.3162i   0.3162 - 0.3162i
   0.9487 - 0.3162i  -0.3162 + 0.9487i
  -0.3162 - 0.9487i   0.3162 - 0.9487i
  -0.3162 + 0.9487i   0.3162 - 0.3162i
   0.3162 + 0.3162i   0.9487 - 0.9487i
  -0.9487 + 0.9487i  -0.3162 + 0.3162i
   0.9487 - 0.9487i  -0.9487 - 0.3162i
  -0.9487 - 0.9487i   0.3162 + 0.9487i
      ⋮

Specify a random sequence of binary values corresponding to a codeword of 8064 bits.

cw = randi([0 1],8064,1);

Using 256-QAM modulation, generate PUSCH modulation symbols for the specified physical layer cell identity number, RNTI, bandwidth, and one transmission layer. Enable transform precoding and codebook-based transmission based on the specified TPMI and four antennas.

modulation = '256QAM';
ncellid = 17;
rnti = 111;
mrb = 6;
nlayers = 1;
transformPrecode = true;
txScheme = 'codebook';
tpmi = 1;
nports = 4;
sym = nrPUSCH(cw,modulation,nlayers,ncellid,rnti,transformPrecode,mrb,txScheme,nports,tpmi)
sym = 1008×4 complex

   0.0000 + 0.0000i   0.2169 + 0.2350i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i   0.2296 + 0.3713i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i  -0.0797 - 0.9008i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i  -0.4767 - 0.0143i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i   0.4124 + 0.2638i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i  -0.1433 - 0.2366i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i   0.0885 - 0.1080i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i   0.5507 - 0.1894i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i  -0.3039 - 0.9165i   0.0000 + 0.0000i   0.0000 + 0.0000i
   0.0000 + 0.0000i  -0.1498 + 0.3356i   0.0000 + 0.0000i   0.0000 + 0.0000i
      ⋮

Input Arguments

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UL-SCH codeword from TS 38.212 Section 6.2.7, specified as a column vector of integers from –2 to 1.

  • 0 and 1 represent false and true bit values, respectively.

  • –1 and –2 represent x and y placeholders in the uplink control information (UCI), respectively. For more details, see TS 38.212 Sections 5.3.3.1 and 5.3.3.2.

Data Types: double | int8

Modulation scheme, specified as 'pi/2-BPSK', 'QPSK', '16QAM', '64QAM', or '256QAM'. This modulation scheme determines the modulation type and number of bits used per modulation symbol.

Modulation SchemeNumber of Bits Per Symbol
'pi/2-BPSK'1
'QPSK'2
'16QAM'4
'64QAM'6
'256QAM'8

Data Types: char | string

Number of transmission layers, specified as an integer from 1 to 4. For more information, see TS 38.211 Section 6.3.1.3.

Data Types: double

Scrambling identity, specified as an integer from 0 to 1023. nid is higher layer parameter dataScramblingIdentityPUSCH, ranging from 0 to 1023, if the higher layer parameter is configured. Otherwise, nid is physical layer cell identity number NCellID, ranging from 0 to 1007. For more information, see TS 38.211 Section 6.3.1.1.

Data Types: double

RNTI of the UE, specified as an integer from 0 to 65,535.

Data Types: double

Transform precoding, specified as false or true. For more information, see TS 38.211 Section 6.3.1.4.

Data Types: double | logical

Number of allocated PUSCH resource blocks, specified as an integer from 1 to 275. For more information, see TS 38.214 Section 6.1.2.

Data Types: double

Transmission scheme, specified as one of these values:

  • 'nonCodebook' — Use this option to disable MIMO precoding.

  • 'codebook' — Use this option for codebook-based transmission using MIMO precoding.

For more information, see TS 38.211 Section 6.3.1.4.

Data Types: char | string

Transmitted precoding matrix indicator, specified as an integer from 0 to 27. The valid range of tpmi depends on the specified number of transmission layers, nLayers, and number of antenna ports, nPorts. For more information, see TS 38.211 Tables 6.3.1.5-1 to 6.3.1.5-7.

Data Types: double

Number of antenna ports, specified as 1 , 2, or 4. For more information, see TS 38.211 Section 6.3.1.5.

Data Types: double

Data type of the output symbols, specified as 'double' or 'single'.

Data Types: char | string

Output Arguments

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PUSCH modulation symbols, returned as a complex matrix. If txScheme is set to 'codebook', the number of matrix columns is nPorts. If txScheme is set to 'nonCodebook', the number of matrix columns is nLayers.

Data Types: single | double
Complex Number Support: Yes

References

[1] 3GPP TS 38.211. “NR; Physical channels and modulation.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network.

[2] 3GPP TS 38.212. “NR; Multiplexing and channel coding.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network.

Extended Capabilities

Introduced in R2019a