3.2.4.3.3. LDPC Puncturer parameters¶
3.2.4.3.3.1. --pct-fra-size, -N 
¶
Type: integer Examples: --pct-fra-size 912
Set the frame size \(N\). This is not necessarily the codeword size if a puncturing pattern is used.
3.2.4.3.3.2. --pct-type¶
Type: text Allowed values: LDPCNODefault: LDPCExamples: --pct-type LDPC
Select the puncturer type.
Description of the allowed values:
| Value | Description |
|---|---|
NO |
Disable the puncturer. |
LDPC |
Puncture the LDPC codeword. |
3.2.4.3.3.3. --pct-pattern¶
Type: binary vector Examples: --pct-pattern "1,1,1,0"
Give the puncturing pattern following the LDPC code. The number \(P\) of values given in this pattern must be as \(N_{cw} = P \times Z\) where \(Z\) is the number of bits represented by a single value in the pattern.
This LDPC puncturer behavior is such as, for the above example, the first three quarter bits are kept and the last quarter is removed from the frame.