Tradeoff functions for constrained systems with unconstrained positions

  title={Tradeoff functions for constrained systems with unconstrained positions},
  author={Tze-Lei Poo and Panu Chaichanavong and Brian H. Marcus},
  journal={IEEE Transactions on Information Theory},
We introduce a new method for analyzing and constructing combined modulation and error-correcting codes (ECCs), in particular codes that utilize some form of reverse concatenation and whose ECC decoding scheme requires easy access to soft information. We expand the work of Immink and Wijngaarden and also of Campello, Marcus, New, and Wilson, in which certain bit positions in the modulation code are deliberately left unconstrained for the ECC parity bits, in the sense that such positions can… CONTINUE READING


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