In this letter, it is shown that after a proper simple modification, the soft-output Viterbi algorithm (SOVA) proposed by Hagenauer and Hoeher becomes equivalent to the Max-Log-maximum a posteriori ( MAP) decoding alg...
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In this letter, it is shown that after a proper simple modification, the soft-output Viterbi algorithm (SOVA) proposed by Hagenauer and Hoeher becomes equivalent to the Max-Log-maximum a posteriori ( MAP) decoding algorithm. Consequently, this modified SOVA allows to implement the Max-Log-MAP decoding algorithm by simply adjusting the conventional Viterbi algorithm. Hence, it provides an attractive solution to achieve low-complexity near-optimum soft-input soft-output decoding.
For binary codes, Fossorier et al. (1998), have shown that the soft-output Viterbi algorithm (SOVA) becomes equivalent to the max-log-maximum a posteriori (MAP) algorithm after a modification. In this letter, such mod...
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