5G NR Status Interface Definition for LDPC Encode - 1.1 English

Soft-Decision FEC Integrated Block LogiCORE IP Product Guide (PG256)

Document ID
PG256
Release Date
2022-10-19
Version
1.1 English

When the supported standard is 5G NR the status data interface is 40 bits with the fields shown in the following table for LDPC encode.

Table 1. 5G NR Status Interface Definition for LDPC Encode
Field Bits Range Description
  39:38 - Reserved
mb 37:32 4 to 46 Number of parity bits as a multiple of Z (Z*mb), thereby controlling code rate
id 31:24 0 to 255 External block identifier supplied through input
  23:15 - Reserved
hard_op 14 1 Hard output (fixed value)
op 13 1 Encode operation (fixed value)
  12:9 - Reserved
bg 8:6 0 to 4 Base graph
z_set 5:3 0 to 7 Base graph cyclic shift set
z_j 2:0 0 to 7 Lifting factor (Z) j component 1
  1. The lifting factor is given by Z=a*2z_j where a is defined in Lifting Factor Component (a).