CB-CRC

Segmentation of code blocks and attachment of CRC code blocks.

cb crc

Description

The CB-CRC block performs segmentation of the input data into code blocks for Low-Density Parity-Check (LDPC, Low-Density Parity-Check) coding and adds a Cyclic Redundancy Check (CRC, Cyclic Redundancy Check) checksum based on the BGN input base graph number in accordance with section 5.2.2 of TS 38.212.

Input

# CRCEn — input data block with CRC
vector

Details

Input data block with CRC.

Data types	`Int64`, `Bool`.
Complex numbers support	No

# BGN — LDPC base chart selection
scalar

Details

Selects the LDPC base graph as a constant that can take the value 1 or 2.

Data types	`Int64`.
Complex numbers support	No

Output

# SEG — code block segments with added bits
matrix

Details

Matrix of code block segments with added bits.

Data types	`Int64`.
Complex numbers support	No

# GI — LDPC base chart index
scalar

Details

Selects the index of the LDPC base graph as a constant that can take the value 1 or 2.

Data types	`Int64`.
Complex numbers support	No

Parameters

PDSCH

# TargetCodeRate — code frequency
Real number

Details

The code frequency as a scalar.

Values must be in the range from 0 to 1024.

Default value	`120`
Program usage name	`targetcoderate`
Tunable	No
Evaluatable	Yes

References

3GPP TS 38.212. "NR; Multiplexing and channel coding." 3rd Generation Partnership Project; Technical Specification Group Radio Access Network.
Glossary: Standard 5G