主要内容

ltepdsch

Physical downlink shared channel

描述

example

sym= ltePDSCH(enb,chs,cws)返回一个包含物理下行链路共享通道(PDSCH)复杂符号的矩阵,用于细胞范围的设置,enb,通道传输配置,chs, 和the codeword or codewords contained incws。通道处理包括争夺,符号调制,层映射和预编码的阶段。

例子

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Generate the configuration structure for Test Model E-TM1.1 10 MHz, as specified in TS36.141

Initialize the test model usingltetestmodel。生成与PDSCH索引相关的信息并使用info.gd输出以确定所需的运输块。执行Letterlsch要创建代码字,然后生成PDSCH符号。

tm = lteTestModel('1.1','10MHz'); tm.PDSCH.RNTI = 0; tm.PDSCH.RV = 0; prbset = (0:tm.NDLRB-1)'; [ind,info] = ltePDSCHIndices(tm,tm.PDSCH,prbset); trBlk = randi([0,1],info.Gd,1); cw = lteDLSCH(tm,tm.PDSCH,info.G,trBlk); pdschSym = ltePDSCH(tm,tm.PDSCH,cw);

Input Arguments

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EnodeB范围内的设置, specified as a structure containing these parameter fields.

Parameter Field 必需的或者Optional Values 描述
ncellid 必需的

Integer from 0 to 503

Physical layer cell identity

NSubframe 必需的

0(默认),非负标量整数

Subframe number

CellRefp 必需的

1、2、4

Number of cell-specific reference signal (CRS) antenna ports

DuplexMode Optional

'FDD'(默认),'TDD'

Duplexing mode, specified as:

  • 'FDD'for Frequency Division Duplex or

  • 'TDD'用于时间分段的双工

The following parameters are dependent upon the condition thatDuplexMode被设定为'TDD'

TDDConfig Optional

0, 1 (default), 2, 3, 4, 5, 6

上行链路 - 下链接配置

SSC Optional

0 (default), 1, 2, 3, 4, 5, 6, 7, 8, 9

Special subframe configuration (SSC)

The following parameter fields are dependent upon the condition thatchsTxScheme被设定为'SpatialMux'或者'MultiUser'

CFI 必需的

1、2或3
Scalar or if the CFI varies per subframe, a vector of length 10 (corresponding to a frame).

Control format indicator (CFI) 价值。在TDD模式下,CFIRMCS的每个子框架有所不同('R.0', 'R.5', 'R.6', 'R.6-27RB', 'R.12-9RB')

NDLRB 必需的

Scalar integer from 6 to 110

Number of downlink resource blocks. ( N RB DL )

CyclicPrefix Optional

'Normal'(默认),“扩展”

Cyclic prefix length

通道特定的传输配置,指定为可以包含以下参数字段的结构。

Parameter Field 必需的或者Optional Values 描述
调制 必需的 'qpsk','16Qam','64QAM','256Qam','1024QAM'

调制类型,指定为字符向量,字符矢量的单元格数组或字符串数​​组。如果块,每个单元格与传输块关联。

rnti 必需的

0 (default), scalar integer

Radio network temporary identifier (RNTI) value (16 bits)

TxScheme Optional

'Port0'(默认),“ txdiversity”,'CDD','SpatialMux','MultiUser','Port5','Port7-8','port8','port7-14'

PDSCH transmission scheme, specified as one of the following options.

Transmission scheme 描述
'Port0' 单天线端口,端口0
“ txdiversity” Transmit diversity
'CDD' 大延迟循环延迟多样性方案
'SpatialMux' Closed loop spatial multiplexing
'MultiUser' 多用户mimo
'Port5' Single-antenna port, port 5
'Port7-8' 单天线端口,端口7,whenNLayers= 1。Dual layer transmission, ports 7 and 8, whenNLayers= 2
'port8' Single-antenna port, port 8
'port7-14' Up to eight layer transmission, ports 7–14

The following parameters are dependent upon the condition thatTxScheme被设定为'CDD','SpatialMux','MultiUser','Port7-8'或者'port7-14'
NLayers 必需的

整数从1到8

Number of transmission layers.

The number of layers is dependent onTxScheme

PMISet 必需的

整数矢量为0到15。

预编码器矩阵指示(PMI)集。它可以包含一个对应于单个PMI模式的单个值,也可以包含对应于多个或子带PMI模式的多个值。值的数量取决于CellReFP,传输层和TXSCHEME。有关设置PMI参数的更多信息,请参阅ltepmiinfo

PRBSet 必需的

Integer column vector or two-column matrix

基于零的物理资源块(PRB)索引与该PDSCH的插槽明智资源分配相对应。PRBSet可以分配为:

  • a column vector, the resource allocation is the same in both slots of the subframe,

  • a two-column matrix, this parameter specifies different PRBs for each slot in a subframe,

  • a cell array of length 10 (corresponding to a frame, if the allocated physical resource blocks vary across subframes).

PRBSet varies per subframe for the RMCs'r.25'(TDD),'R.26'(TDD),'R.27'(TDD),'R.43'(fdd),'r.44','r.45','r.48','R.50', 和'R.51'

The following parameters are dependent upon the condition thatTxScheme被设定为'Port5','Port7-8','port8', or'port7-14'
W Optional

Numeric matrix,[](默认)

NLayers-经过-PPDSCH符号的宽带UE特异性光束的预编码矩阵。P是发射天线的数量。什么时候Wis not specified, no precoding is applied.

代码字或代码字, specified as a vector of bit values for one codeword to be modulated, or a cell array containing one or two vectors of bit values corresponding to the one or two codewords to be modulated.

Output Arguments

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PDSCH symbols, returned as a complex numeric matrix. It has sizeN-经过-P, whereNis the number of modulation symbols for one antenna port andP是传输天线的数量。复杂的符号是使用单元格设置生成的,enb,通道传输配置,chs, 和the codeword or codewords contained incws

Data Types:double
Complex Number Support:Yes

参考

[1] 3GPP TS 36.101. “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) Radio Transmission and Reception.”3rd Generation Partnership Project; Technical Specification Group Radio Access Network

[2] 3GPP TS 36.141。“进化的通用地面无线电通道(E-UTRA);基站(BS)一致性测试。”3rd Generation Partnership Project; Technical Specification Group Radio Access Network

Version History

在R2014A中引入