Probability density functions of soft information

  title={Probability density functions of soft information},
  author={Luca Reggiani and Guido Tartara},
  journal={IEEE Communications Letters},
It is well known that soft decoding algorithms are based on the use of reliability measures for binary and nonbinary symbols. We consider an analytical estimation of the distributions of reliability measures after soft decoding of block and convolutional codes or intersymbol interference (ISI) channels. This estimation, based on a simple geometric interpretation of reliability measures, allows the observation of different distributions for correct and incorrect symbols, and could be helpful for… CONTINUE READING

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A Viterbi algorithm with soft-decision outputs and its applications

J. Hagenauer, P. Hoeher
IEEE Globecom 1989 , Dallas, TX, pp. 1680–1686. • 1989
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