Low density parity check layer decoder for codes with overlapped circulants

摘要

The present inventions are related to systems and methods for decoding data in an LDPC layer decoder for LDPC codes with overlapped circulants.

主权项

1. An apparatus for low density parity check decoding comprising:
a variable node processor operable to generate variable node to check node messages and to calculate perceived values based on check node to variable node messages; a check node processor operable to generate the check node to variable node messages and to calculate checksums based on variable node to check node messages; and a scheduler operable to select older variable node to check node messages for overlapped circulants for the check node processor to use when generating the check node to variable node messages, wherein the decoding comprises layer decoding, and wherein the selection of older variable node to check node messages for overlapped circulants comprises selecting variable node to check node messages prepared earlier than a previous decoding iteration.