nrDLSCHInfo

Get downlink shared channel (DL-SCH) information

Syntax

info = nrDLSCHInfo(tBlkLen,targetCodeRate)

Description

info = nrDLSCHInfo(tBlkLen,targetCodeRate) returns a structure containing DL-SCH information for an input transport block size tBlkLen and target code rate targetCodeRate. The DL-SCH information includes the cyclic redundancy check (CRC) attachment, code block segmentation (CBS), and channel coding.

Examples

Get DL-SCH Information

Show DL-SCH information before rate matching for an input transport block of length 8456 and target code rate 517/1024. The displayed DL-SCH information shows:

• The transport block has 312 <NULL> filler bits per code block.

• The number of bits per code block, after CBS, is 4576.

• The number of bits per code block, after low-density parity-check (LDPC) coding, is 13,728.

tBlkLen = 8456;
targetCodeRate = 517/1024;
nrDLSCHInfo(tBlkLen,targetCodeRate)

ans = struct with fields:
    CRC: '24A'
      L: 24
    BGN: 1
      C: 2
    Lcb: 24
      F: 312
     Zc: 208
      K: 4576
      N: 13728

Input Arguments

tBlkLen — Transport block size

nonnegative integer

Transport block size, specified as a nonnegative integer.

Data Types: double

targetCodeRate — Target code rate

real number

Target code rate, specified as a real number in the range (0, 1).

Data Types: double

Output Arguments

info — DL-SCH information

structure

DL-SCH information, returned as a structure containing these fields.

Fields	Values	Description
CRC	'16', '24A'	CRC polynomial selection
L	0, 16, 24	Number of CRC bits
BGN	1, 2	LDPC base graph selection
C	Positive integer	Number of code blocks
Lcb	0, 24	Number of parity bits per code block
F	Nonnegative integer	Number of <NULL> filler bits per code block
Zc	Positive integer	Lifting size selection
K	Nonnegative integer	Number of bits per code block after CBS
N	Nonnegative integer	Number of bits per code block after LDPC coding

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2018b