Soft Value Representation for DIN and DOUT - 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

For both turbo and LDPC decode, the soft value log-likelihood ratio is defined as:

As a consequence, negative LLR values are interpreted as hard binary value 0. Positive values (and 0) are interpreted as hard binary value 1.