The box-minus operator and its application to low-complexity belief propagation decoding

@article{Clevorn2005TheBO,
  title={The box-minus operator and its application to low-complexity belief propagation decoding},
  author={Thorsten Clevorn and Peter Vary},
  journal={2005 IEEE 61st Vehicular Technology Conference},
  year={2005},
  volume={1},
  pages={687-691 Vol. 1}
}
For iterative decoding of turbo codes and low-density parity check (LDPC) codes quite often log-likelihood ratios called L-values are used. A major role in the decoding algorithms is played by extrinsic information which is obtained as L-value of a modulo 2 combination of several bits. This leads in the L-domain to the so-called box-plus operation. In this paper we introduce a complementary box-minus operation. Based on it a low-complexity but powerful belief propagation algorithm for decoding… CONTINUE READING

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