Systems and methods for augmenting the performance of iterative soft decision-in soft decision-out decoding of block codes with extrinsic information based on multiple parity equations inherent to the block codes. Cyclic shifting of codewords may be applied in the context of iterative soft decision-in...http://www.google.com/patents/US6499128?utm_source=gb-gplus-sharePatent US6499128 - Iterated soft-decision decoding of block codes
