Iterative reduced-search decoding for coded partial-response channels

Energy-efficient soft-output trellis decoder design using trellis quasi-reduction and importance-aware clock skew scheduling

“…At the algorithm level, energy reduction may be realized through reduced-state trellis decoding [3], [4] by merging a certain number of states in the original trellis into one super state. Decision feedback is typically used to partially compensate the performance degradation incurred by trellis reduction.…”